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d = dbm.open(file, 'w', 0o666)
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type of database being opened (determined by the whichdb function) in the case
of an existing dbm. If the dbm does not exist and the create or new flag ('c'
or 'n') was specified, the dbm type will be determined by the availability of
the modules (tested in the above order).
It has the following interface (key and data are strings):
d[key] = data # store data at key (may override data at
# existing key)
data = d[key] # retrieve data at key (raise KeyError if no
# such key)
del d[key] # delete data stored at key (raises KeyError
# if no such key)
flag = key in d # true if the key exists
list = d.keys() # return a list of all existing keys (slow!)
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XXX TO DO:
- seems to contain a bug when updating...
- reclaim free space (currently, space once occupied by deleted or expanded
items is never reused)
- support concurrent access (currently, if two processes take turns making
updates, they can mess up the index)
- support efficient access to large databases (currently, the whole index
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XXX TO DO:
- seems to contain a bug when updating...
- reclaim free space (currently, space once occupied by deleted or expanded
items is never reused)
- support concurrent access (currently, if two processes take turns making
updates, they can mess up the index)
- support efficient access to large databases (currently, the whole index
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- support opening for read-only (flag = 'm')
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Object for wrapping/filling text. The public interface consists of
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Several instance attributes control various aspects of wrapping:
width (default: 70)
the maximum width of wrapped lines (unless break_long_words
is false)
initial_indent (default: "")
string that will be prepended to the first line of wrapped
output. Counts towards the line's width.
subsequent_indent (default: "")
string that will be prepended to all lines save the first
of wrapped output; also counts towards each line's width.
expand_tabs (default: true)
Expand tabs in input text to spaces before further processing.
Each tab will become 0 .. 'tabsize' spaces, depending on its position
in its line. If false, each tab is treated as a single character.
tabsize (default: 8)
Expand tabs in input text to 0 .. 'tabsize' spaces, unless
'expand_tabs' is false.
replace_whitespace (default: true)
Replace all whitespace characters in the input text by spaces
after tab expansion. Note that if expand_tabs is false and
replace_whitespace is true, every tab will be converted to a
single space!
fix_sentence_endings (default: false)
Ensure that sentence-ending punctuation is always followed
by two spaces. Off by default because the algorithm is
(unavoidably) imperfect.
break_long_words (default: true)
Break words longer than 'width'. If false, those words will not
be broken, and some lines might be longer than 'width'.
break_on_hyphens (default: true)
Allow breaking hyphenated words. If true, wrapping will occur
preferably on whitespaces and right after hyphens part of
compound words.
drop_whitespace (default: true)
Drop leading and trailing whitespace from lines.
max_lines (default: None)
Truncate wrapped lines.
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Append to the last line of truncated text.
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Look, goof-ball -- use the -b option!
breaks into the following chunks:
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Correct for sentence endings buried in 'chunks'. Eg. when the
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Wrap a sequence of text chunks and return a list of lines of
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to words and the whitespace between them: each chunk is
indivisible (modulo 'break_long_words'), but a line break can
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Module difflib -- helpers for computing deltas between objects.
Function get_close_matches(word, possibilities, n=3, cutoff=0.6):
Use SequenceMatcher to return list of the best "good enough" matches.
Function context_diff(a, b):
For two lists of strings, return a delta in context diff format.
Function ndiff(a, b):
Return a delta: the difference between `a` and `b` (lists of strings).
Function restore(delta, which):
Return one of the two sequences that generated an ndiff delta.
Function unified_diff(a, b):
For two lists of strings, return a delta in unified diff format.
Class SequenceMatcher:
A flexible class for comparing pairs of sequences of any type.
Class Differ:
For producing human-readable deltas from sequences of lines of text.
Class HtmlDiff:
For producing HTML side by side comparison with change highlights.
�get_close_matches�ndiff�restore�SequenceMatcher�Differ�IS_CHARACTER_JUNK� IS_LINE_JUNK� context_diff� unified_diff�
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namedtupleza b sizec C s |rd| | S dS )Ng @g �?� )�matches�lengthr r � /usr/lib64/python3.6/difflib.py�_calculate_ratio& s r c @ st e Zd ZdZd dd�Zdd� Zd d
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SequenceMatcher is a flexible class for comparing pairs of sequences of
any type, so long as the sequence elements are hashable. The basic
algorithm predates, and is a little fancier than, an algorithm
published in the late 1980's by Ratcliff and Obershelp under the
hyperbolic name "gestalt pattern matching". The basic idea is to find
the longest contiguous matching subsequence that contains no "junk"
elements (R-O doesn't address junk). The same idea is then applied
recursively to the pieces of the sequences to the left and to the right
of the matching subsequence. This does not yield minimal edit
sequences, but does tend to yield matches that "look right" to people.
SequenceMatcher tries to compute a "human-friendly diff" between two
sequences. Unlike e.g. UNIX(tm) diff, the fundamental notion is the
longest *contiguous* & junk-free matching subsequence. That's what
catches peoples' eyes. The Windows(tm) windiff has another interesting
notion, pairing up elements that appear uniquely in each sequence.
That, and the method here, appear to yield more intuitive difference
reports than does diff. This method appears to be the least vulnerable
to synching up on blocks of "junk lines", though (like blank lines in
ordinary text files, or maybe "<P>" lines in HTML files). That may be
because this is the only method of the 3 that has a *concept* of
"junk" <wink>.
Example, comparing two strings, and considering blanks to be "junk":
>>> s = SequenceMatcher(lambda x: x == " ",
... "private Thread currentThread;",
... "private volatile Thread currentThread;")
>>>
.ratio() returns a float in [0, 1], measuring the "similarity" of the
sequences. As a rule of thumb, a .ratio() value over 0.6 means the
sequences are close matches:
>>> print(round(s.ratio(), 3))
0.866
>>>
If you're only interested in where the sequences match,
.get_matching_blocks() is handy:
>>> for block in s.get_matching_blocks():
... print("a[%d] and b[%d] match for %d elements" % block)
a[0] and b[0] match for 8 elements
a[8] and b[17] match for 21 elements
a[29] and b[38] match for 0 elements
Note that the last tuple returned by .get_matching_blocks() is always a
dummy, (len(a), len(b), 0), and this is the only case in which the last
tuple element (number of elements matched) is 0.
If you want to know how to change the first sequence into the second,
use .get_opcodes():
>>> for opcode in s.get_opcodes():
... print("%6s a[%d:%d] b[%d:%d]" % opcode)
equal a[0:8] b[0:8]
insert a[8:8] b[8:17]
equal a[8:29] b[17:38]
See the Differ class for a fancy human-friendly file differencer, which
uses SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
See also function get_close_matches() in this module, which shows how
simple code building on SequenceMatcher can be used to do useful work.
Timing: Basic R-O is cubic time worst case and quadratic time expected
case. SequenceMatcher is quadratic time for the worst case and has
expected-case behavior dependent in a complicated way on how many
elements the sequences have in common; best case time is linear.
Methods:
__init__(isjunk=None, a='', b='')
Construct a SequenceMatcher.
set_seqs(a, b)
Set the two sequences to be compared.
set_seq1(a)
Set the first sequence to be compared.
set_seq2(b)
Set the second sequence to be compared.
find_longest_match(alo, ahi, blo, bhi)
Find longest matching block in a[alo:ahi] and b[blo:bhi].
get_matching_blocks()
Return list of triples describing matching subsequences.
get_opcodes()
Return list of 5-tuples describing how to turn a into b.
ratio()
Return a measure of the sequences' similarity (float in [0,1]).
quick_ratio()
Return an upper bound on .ratio() relatively quickly.
real_quick_ratio()
Return an upper bound on ratio() very quickly.
N� Tc C s( || _ d | _| _|| _| j||� dS )a! Construct a SequenceMatcher.
Optional arg isjunk is None (the default), or a one-argument
function that takes a sequence element and returns true iff the
element is junk. None is equivalent to passing "lambda x: 0", i.e.
no elements are considered to be junk. For example, pass
lambda x: x in " \t"
if you're comparing lines as sequences of characters, and don't
want to synch up on blanks or hard tabs.
Optional arg a is the first of two sequences to be compared. By
default, an empty string. The elements of a must be hashable. See
also .set_seqs() and .set_seq1().
Optional arg b is the second of two sequences to be compared. By
default, an empty string. The elements of b must be hashable. See
also .set_seqs() and .set_seq2().
Optional arg autojunk should be set to False to disable the
"automatic junk heuristic" that treats popular elements as junk
(see module documentation for more information).
N)�isjunk�a�b�autojunk�set_seqs)�selfr r r r r r r �__init__� s ; zSequenceMatcher.__init__c C s | j |� | j|� dS )z�Set the two sequences to be compared.
>>> s = SequenceMatcher()
>>> s.set_seqs("abcd", "bcde")
>>> s.ratio()
0.75
N)�set_seq1�set_seq2)r r r r r r r � s
zSequenceMatcher.set_seqsc C s$ || j krdS || _ d | _| _dS )aM Set the first sequence to be compared.
The second sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq1("bcde")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq2().
N)r �matching_blocks�opcodes)r r r r r r � s
zSequenceMatcher.set_seq1c C s2 || j krdS || _ d | _| _d| _| j� dS )aM Set the second sequence to be compared.
The first sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq2("abcd")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq1().
N)r r r �
fullbcount�_SequenceMatcher__chain_b)r r r r r r � s
zSequenceMatcher.set_seq2c C s� | j }i | _}x*t|�D ] \}}|j|g �}|j|� qW t� | _}| j}|r�x"|j� D ]}||�r\|j |� q\W x|D ]
}||= q|W t� | _
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}||= q�W d S )N�� �d � )r �b2j� enumerate�
setdefault�append�set�bjunkr �keys�addZbpopular�lenr �items) r r r& �i�elt�indicesZjunkr Zpopular�nZntestZidxsr r r Z __chain_b) s,
zSequenceMatcher.__chain_bc C sN | j | j| j| jjf\}}}}||d } }
} i } g }
x�t||�D ]�}| j}i }xn|j|| |
�D ]Z}||k rpqb||krzP ||d d�d }||< || krb|| d || d | } }
} qbW |} qBW xb| |k�r*|
|k�r*|||
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} q�W xX| | |k �r�|
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| k�r@| d } �q�W t| |
| �S )a� Find longest matching block in a[alo:ahi] and b[blo:bhi].
If isjunk is not defined:
Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
alo <= i <= i+k <= ahi
blo <= j <= j+k <= bhi
and for all (i',j',k') meeting those conditions,
k >= k'
i <= i'
and if i == i', j <= j'
In other words, of all maximal matching blocks, return one that
starts earliest in a, and of all those maximal matching blocks that
start earliest in a, return the one that starts earliest in b.
>>> s = SequenceMatcher(None, " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=0, b=4, size=5)
If isjunk is defined, first the longest matching block is
determined as above, but with the additional restriction that no
junk element appears in the block. Then that block is extended as
far as possible by matching (only) junk elements on both sides. So
the resulting block never matches on junk except as identical junk
happens to be adjacent to an "interesting" match.
Here's the same example as before, but considering blanks to be
junk. That prevents " abcd" from matching the " abcd" at the tail
end of the second sequence directly. Instead only the "abcd" can
match, and matches the leftmost "abcd" in the second sequence:
>>> s = SequenceMatcher(lambda x: x==" ", " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=1, b=0, size=4)
If no blocks match, return (alo, blo, 0).
>>> s = SequenceMatcher(None, "ab", "c")
>>> s.find_longest_match(0, 2, 0, 1)
Match(a=0, b=0, size=0)
r
r% )r r r& r+ � __contains__�range�getr )r �alo�ahi�blo�bhir r r& ZisbjunkZbestiZbestjZbestsizeZj2lenZnothingr0 Zj2lengetZnewj2len�j�kr r r �find_longest_matchP sB 8 $ " z"SequenceMatcher.find_longest_matchc C s� | j dk r| j S t| j�t| j� }}d|d|fg}g }x�|r�|j� \}}}}| j||||� \} }
} } | r:|j| � || k r�||
k r�|j|| ||
f� | | |k r:|
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}}g }x^|D ]V\}}}|
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||f� ||| }
}}q�W |�r\|j|
||f� |j||df� tt t
j |��| _ | j S )a Return list of triples describing matching subsequences.
Each triple is of the form (i, j, n), and means that
a[i:i+n] == b[j:j+n]. The triples are monotonically increasing in
i and in j. New in Python 2.5, it's also guaranteed that if
(i, j, n) and (i', j', n') are adjacent triples in the list, and
the second is not the last triple in the list, then i+n != i' or
j+n != j'. IOW, adjacent triples never describe adjacent equal
blocks.
The last triple is a dummy, (len(a), len(b), 0), and is the only
triple with n==0.
>>> s = SequenceMatcher(None, "abxcd", "abcd")
>>> list(s.get_matching_blocks())
[Match(a=0, b=0, size=2), Match(a=3, b=2, size=2), Match(a=5, b=4, size=0)]
Nr
) r r. r r �popr= r) �sort�list�mapr �_make)r �la�lbZqueuer r7 r8 r9 r: r0 r; r< �x�i1�j1Zk1Z non_adjacent�i2�j2Zk2r r r �get_matching_blocks� s8
z#SequenceMatcher.get_matching_blocksc C s� | j dk r| j S d }}g | _ }x�| j� D ]�\}}}d}||k rP||k rPd}n||k r^d}n ||k rjd}|r�|j|||||f� || || }}|r,|jd||||f� q,W |S )a[ Return list of 5-tuples describing how to turn a into b.
Each tuple is of the form (tag, i1, i2, j1, j2). The first tuple
has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
tuple preceding it, and likewise for j1 == the previous j2.
The tags are strings, with these meanings:
'replace': a[i1:i2] should be replaced by b[j1:j2]
'delete': a[i1:i2] should be deleted.
Note that j1==j2 in this case.
'insert': b[j1:j2] should be inserted at a[i1:i1].
Note that i1==i2 in this case.
'equal': a[i1:i2] == b[j1:j2]
>>> a = "qabxcd"
>>> b = "abycdf"
>>> s = SequenceMatcher(None, a, b)
>>> for tag, i1, i2, j1, j2 in s.get_opcodes():
... print(("%7s a[%d:%d] (%s) b[%d:%d] (%s)" %
... (tag, i1, i2, a[i1:i2], j1, j2, b[j1:j2])))
delete a[0:1] (q) b[0:0] ()
equal a[1:3] (ab) b[0:2] (ab)
replace a[3:4] (x) b[2:3] (y)
equal a[4:6] (cd) b[3:5] (cd)
insert a[6:6] () b[5:6] (f)
Nr
r �replace�delete�insert�equal)r rJ r) )r r0 r; Zanswer�ai�bj�size�tagr r r � get_opcodes s$
zSequenceMatcher.get_opcodes� c
c sr | j � }|sdg}|d d dkrZ|d \}}}}}|t||| �|t||| �|f|d< |d d dkr�|d \}}}}}||t||| �|t||| �f|d< || }g } x�|D ]�\}}}}}|dko�|| |k�r(| j||t||| �|t||| �f� | V g } t||| �t||| � }}| j|||||f� q�W | �rnt| �dk�ob| d d dk �rn| V dS ) a� Isolate change clusters by eliminating ranges with no changes.
Return a generator of groups with up to n lines of context.
Each group is in the same format as returned by get_opcodes().
>>> from pprint import pprint
>>> a = list(map(str, range(1,40)))
>>> b = a[:]
>>> b[8:8] = ['i'] # Make an insertion
>>> b[20] += 'x' # Make a replacement
>>> b[23:28] = [] # Make a deletion
>>> b[30] += 'y' # Make another replacement
>>> pprint(list(SequenceMatcher(None,a,b).get_grouped_opcodes()))
[[('equal', 5, 8, 5, 8), ('insert', 8, 8, 8, 9), ('equal', 8, 11, 9, 12)],
[('equal', 16, 19, 17, 20),
('replace', 19, 20, 20, 21),
('equal', 20, 22, 21, 23),
('delete', 22, 27, 23, 23),
('equal', 27, 30, 23, 26)],
[('equal', 31, 34, 27, 30),
('replace', 34, 35, 30, 31),
('equal', 35, 38, 31, 34)]]
rN r
r% N)rN r
r% r
r% ���rU rU )rS �max�minr) r. )
r r3 ZcodesrR rF rH rG rI Znn�groupr r r �get_grouped_opcodes< s( &&( (z#SequenceMatcher.get_grouped_opcodesc C s0 t dd� | j� D ��}t|t| j�t| j� �S )a� Return a measure of the sequences' similarity (float in [0,1]).
Where T is the total number of elements in both sequences, and
M is the number of matches, this is 2.0*M / T.
Note that this is 1 if the sequences are identical, and 0 if
they have nothing in common.
.ratio() is expensive to compute if you haven't already computed
.get_matching_blocks() or .get_opcodes(), in which case you may
want to try .quick_ratio() or .real_quick_ratio() first to get an
upper bound.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.quick_ratio()
0.75
>>> s.real_quick_ratio()
1.0
c s s | ]}|d V qdS )r% NrU r )�.0Ztripler r r � <genexpr>� s z(SequenceMatcher.ratio.<locals>.<genexpr>)�sumrJ r r. r r )r r r r r �ration s zSequenceMatcher.ratioc C s� | j dkr8i | _ }x"| jD ]}|j|d�d ||< q W | j }i }|jd }}xH| jD ]>}||�rl|| }n |j|d�}|d ||< |dkrV|d }qVW t|t| j�t| j� �S )z�Return an upper bound on ratio() relatively quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute.
Nr
r% )r! r r6 r4 r r r. )r r! r1 ZavailZavailhasr Znumbr r r � quick_ratio� s
zSequenceMatcher.quick_ratioc C s* t | j�t | j� }}tt||�|| �S )z�Return an upper bound on ratio() very quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute than either .ratio() or .quick_ratio().
)r. r r r rW )r rC rD r r r �real_quick_ratio� s z SequenceMatcher.real_quick_ratio)Nr r T)rT )�__name__�
__module__� __qualname__�__doc__r r r r r" r= rJ rS rY r] r^ r_ r r r r r + s j
@ ,'nG7
2 rT �333333�?c C s� |dkst d|f ��d| ko(dkn s<t d|f ��g }t� }|j| � xL|D ]D}|j|� |j� |krV|j� |krV|j� |krV|j|j� |f� qVW t||�}dd� |D �S )a� Use SequenceMatcher to return list of the best "good enough" matches.
word is a sequence for which close matches are desired (typically a
string).
possibilities is a list of sequences against which to match word
(typically a list of strings).
Optional arg n (default 3) is the maximum number of close matches to
return. n must be > 0.
Optional arg cutoff (default 0.6) is a float in [0, 1]. Possibilities
that don't score at least that similar to word are ignored.
The best (no more than n) matches among the possibilities are returned
in a list, sorted by similarity score, most similar first.
>>> get_close_matches("appel", ["ape", "apple", "peach", "puppy"])
['apple', 'ape']
>>> import keyword as _keyword
>>> get_close_matches("wheel", _keyword.kwlist)
['while']
>>> get_close_matches("Apple", _keyword.kwlist)
[]
>>> get_close_matches("accept", _keyword.kwlist)
['except']
r
zn must be > 0: %rg g �?z cutoff must be in [0.0, 1.0]: %rc S s g | ] \}}|�qS r r )rZ ZscorerE r r r �
<listcomp>� s z%get_close_matches.<locals>.<listcomp>) �
ValueErrorr r r r_ r^ r] r) � _nlargest)ZwordZ
possibilitiesr3 �cutoff�result�srE r r r r � s
c C s4 dt | � }}x ||k r.| | |kr.|d7 }qW |S )z}
Return number of `ch` characters at the start of `line`.
Example:
>>> _count_leading(' abc', ' ')
3
r
r% )r. )�line�chr0 r3 r r r �_count_leading� s
rm c @ sJ e Zd ZdZddd�Zdd� Zdd� Zd d
� Zd d � Zd
d� Z dd� Z
dS )r a�
Differ is a class for comparing sequences of lines of text, and
producing human-readable differences or deltas. Differ uses
SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
Each line of a Differ delta begins with a two-letter code:
'- ' line unique to sequence 1
'+ ' line unique to sequence 2
' ' line common to both sequences
'? ' line not present in either input sequence
Lines beginning with '? ' attempt to guide the eye to intraline
differences, and were not present in either input sequence. These lines
can be confusing if the sequences contain tab characters.
Note that Differ makes no claim to produce a *minimal* diff. To the
contrary, minimal diffs are often counter-intuitive, because they synch
up anywhere possible, sometimes accidental matches 100 pages apart.
Restricting synch points to contiguous matches preserves some notion of
locality, at the occasional cost of producing a longer diff.
Example: Comparing two texts.
First we set up the texts, sequences of individual single-line strings
ending with newlines (such sequences can also be obtained from the
`readlines()` method of file-like objects):
>>> text1 = ''' 1. Beautiful is better than ugly.
... 2. Explicit is better than implicit.
... 3. Simple is better than complex.
... 4. Complex is better than complicated.
... '''.splitlines(keepends=True)
>>> len(text1)
4
>>> text1[0][-1]
'\n'
>>> text2 = ''' 1. Beautiful is better than ugly.
... 3. Simple is better than complex.
... 4. Complicated is better than complex.
... 5. Flat is better than nested.
... '''.splitlines(keepends=True)
Next we instantiate a Differ object:
>>> d = Differ()
Note that when instantiating a Differ object we may pass functions to
filter out line and character 'junk'. See Differ.__init__ for details.
Finally, we compare the two:
>>> result = list(d.compare(text1, text2))
'result' is a list of strings, so let's pretty-print it:
>>> from pprint import pprint as _pprint
>>> _pprint(result)
[' 1. Beautiful is better than ugly.\n',
'- 2. Explicit is better than implicit.\n',
'- 3. Simple is better than complex.\n',
'+ 3. Simple is better than complex.\n',
'? ++\n',
'- 4. Complex is better than complicated.\n',
'? ^ ---- ^\n',
'+ 4. Complicated is better than complex.\n',
'? ++++ ^ ^\n',
'+ 5. Flat is better than nested.\n']
As a single multi-line string it looks like this:
>>> print(''.join(result), end="")
1. Beautiful is better than ugly.
- 2. Explicit is better than implicit.
- 3. Simple is better than complex.
+ 3. Simple is better than complex.
? ++
- 4. Complex is better than complicated.
? ^ ---- ^
+ 4. Complicated is better than complex.
? ++++ ^ ^
+ 5. Flat is better than nested.
Methods:
__init__(linejunk=None, charjunk=None)
Construct a text differencer, with optional filters.
compare(a, b)
Compare two sequences of lines; generate the resulting delta.
Nc C s || _ || _dS )a�
Construct a text differencer, with optional filters.
The two optional keyword parameters are for filter functions:
- `linejunk`: A function that should accept a single string argument,
and return true iff the string is junk. The module-level function
`IS_LINE_JUNK` may be used to filter out lines without visible
characters, except for at most one splat ('#'). It is recommended
to leave linejunk None; the underlying SequenceMatcher class has
an adaptive notion of "noise" lines that's better than any static
definition the author has ever been able to craft.
- `charjunk`: A function that should accept a string of length 1. The
module-level function `IS_CHARACTER_JUNK` may be used to filter out
whitespace characters (a blank or tab; **note**: bad idea to include
newline in this!). Use of IS_CHARACTER_JUNK is recommended.
N)�linejunk�charjunk)r rn ro r r r r M s zDiffer.__init__c
c s� t | j||�}x�|j� D ]�\}}}}}|dkrD| j||||||�} n\|dkr^| jd|||�} nB|dkrx| jd|||�} n(|dkr�| jd|||�} ntd|f ��| E d H qW d S )
a�
Compare two sequences of lines; generate the resulting delta.
Each sequence must contain individual single-line strings ending with
newlines. Such sequences can be obtained from the `readlines()` method
of file-like objects. The delta generated also consists of newline-
terminated strings, ready to be printed as-is via the writeline()
method of a file-like object.
Example:
>>> print(''.join(Differ().compare('one\ntwo\nthree\n'.splitlines(True),
... 'ore\ntree\nemu\n'.splitlines(True))),
... end="")
- one
? ^
+ ore
? ^
- two
- three
? -
+ tree
+ emu
rK rL �-rM �+rN � zunknown tag %rN)r rn rS �_fancy_replace�_dumprf )
r r r �cruncherrR r7 r8 r9 r: �gr r r �compared s zDiffer.comparec c s* x$t ||�D ]}d||| f V q W dS )z4Generate comparison results for a same-tagged range.z%s %sN)r5 )r rR rE �lo�hir0 r r r rt � s z Differ._dumpc
c sr || || k r2| j d|||�}| j d|||�}n | j d|||�}| j d|||�}x||fD ]} | E d H q\W d S )Nrq rp )rt )
r r r7 r8 r r9 r: �first�secondrv r r r �_plain_replace� s zDiffer._plain_replacec c sH d\}}t | j�} d\}
} x�t||�D ]�} || }
| j|
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krp|
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} qH| j|� | j� |krH| j� |krH| j� |krH| j� || }}}qHW q&W ||k � r�|
dkr�| j||||||�E dH dS |
| d }}}nd}
| j ||||||�E dH || || }}|
dk�rd }}| j
||� x�| j � D ]�\}}}}}|| || }} |dk�r�|d| 7 }|d| 7 }nb|dk�r�|d | 7 }nJ|d
k�r�|d | 7 }n2|d k�r�|d
| 7 }|d
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||||�E dH n
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When replacing one block of lines with another, search the blocks
for *similar* lines; the best-matching pair (if any) is used as a
synch point, and intraline difference marking is done on the
similar pair. Lots of work, but often worth it.
Example:
>>> d = Differ()
>>> results = d._fancy_replace(['abcDefghiJkl\n'], 0, 1,
... ['abcdefGhijkl\n'], 0, 1)
>>> print(''.join(results), end="")
- abcDefghiJkl
? ^ ^ ^
+ abcdefGhijkl
? ^ ^ ^
�G�z��?� �?Ng �?r rK �^rL rp rM rq rN rr zunknown tag %rz r% )r} r~ )NN)r ro r5 r r r_ r^ r] r| �
_fancy_helperr rS rf �_qformat) r r r7 r8 r r9 r: Z
best_ratiorh ru ZeqiZeqjr; rP r0 rO Zbest_iZbest_jZaeltZbelt�atags�btagsrR Zai1Zai2Zbj1Zbj2rC rD r r r rs � sX
zDiffer._fancy_replacec c sb g }||k r<||k r*| j ||||||�}qT| jd|||�}n||k rT| jd|||�}|E d H d S )Nrp rq )rs rt )r r r7 r8 r r9 r: rv r r r r� � s zDiffer._fancy_helperc c s� t t|d�t|d��}t |t|d|� d��}t |t|d|� d��}||d� j� }||d� j� }d| V |r�dd| |f V d| V |r�dd| |f V dS )a�
Format "?" output and deal with leading tabs.
Example:
>>> d = Differ()
>>> results = d._qformat('\tabcDefghiJkl\n', '\tabcdefGhijkl\n',
... ' ^ ^ ^ ', ' ^ ^ ^ ')
>>> for line in results: print(repr(line))
...
'- \tabcDefghiJkl\n'
'? \t ^ ^ ^\n'
'+ \tabcdefGhijkl\n'
'? \t ^ ^ ^\n'
� Nrr z- z? %s%s
z+ )rW rm �rstrip)r ZalineZbliner� r� �commonr r r r�
s
zDiffer._qformat)NN) r` ra rb rc r rw rt r| rs r� r� r r r r r � s \
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Return 1 for ignorable line: iff `line` is blank or contains a single '#'.
Examples:
>>> IS_LINE_JUNK('\n')
True
>>> IS_LINE_JUNK(' # \n')
True
>>> IS_LINE_JUNK('hello\n')
False
Nr )rk Zpatr r r r > s � c C s | |kS )z�
Return 1 for ignorable character: iff `ch` is a space or tab.
Examples:
>>> IS_CHARACTER_JUNK(' ')
True
>>> IS_CHARACTER_JUNK('\t')
True
>>> IS_CHARACTER_JUNK('\n')
False
>>> IS_CHARACTER_JUNK('x')
False
r )rl Zwsr r r r N s c C s: | d }|| }|dkr"dj |�S |s.|d8 }dj ||�S )z Convert range to the "ed" formatr% z{}z{},{})�format)�start�stop� beginningr r r r �_format_range_unifiede s
r� r �
c c sh t | ||||||� d}�xHtd| |�j|�D �]0} |s�d}|rJdj|�nd}
|r\dj|�nd} dj||
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t| d |
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j|||�V x�| D ]�\}}}}}|dk�rx | ||� D ]}d| V q�W q�|dk�r2x | ||� D ]}d| V �q W |dkr�x |||� D ]}d| V �qHW q�W q.W dS )a�
Compare two sequences of lines; generate the delta as a unified diff.
Unified diffs are a compact way of showing line changes and a few
lines of context. The number of context lines is set by 'n' which
defaults to three.
By default, the diff control lines (those with ---, +++, or @@) are
created with a trailing newline. This is helpful so that inputs
created from file.readlines() result in diffs that are suitable for
file.writelines() since both the inputs and outputs have trailing
newlines.
For inputs that do not have trailing newlines, set the lineterm
argument to "" so that the output will be uniformly newline free.
The unidiff format normally has a header for filenames and modification
times. Any or all of these may be specified using strings for
'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
The modification times are normally expressed in the ISO 8601 format.
Example:
>>> for line in unified_diff('one two three four'.split(),
... 'zero one tree four'.split(), 'Original', 'Current',
... '2005-01-26 23:30:50', '2010-04-02 10:20:52',
... lineterm=''):
... print(line) # doctest: +NORMALIZE_WHITESPACE
--- Original 2005-01-26 23:30:50
+++ Current 2010-04-02 10:20:52
@@ -1,4 +1,4 @@
+zero
one
-two
-three
+tree
four
FNTz {}r z
--- {}{}{}z
+++ {}{}{}r
r% � rT � z@@ -{} +{} @@{}rN rr rK rL rp rM rq rU > rK rL > rM rK )� _check_typesr rY r� r� )r r �fromfile�tofile� fromfiledate�
tofiledater3 �lineterm�startedrX �fromdate�todaterz �last� file1_range� file2_rangerR rF rH rG rI rk r r r r p s0 )
c C sB | d }|| }|s |d8 }|dkr.dj |�S dj ||| d �S )z Convert range to the "ed" formatr% z{}z{},{})r� )r� r� r� r r r r �_format_range_context� s
r� c c s� t | ||||||� tddddd�}d} �xztd| |�j|�D �]b}
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Compare two sequences of lines; generate the delta as a context diff.
Context diffs are a compact way of showing line changes and a few
lines of context. The number of context lines is set by 'n' which
defaults to three.
By default, the diff control lines (those with *** or ---) are
created with a trailing newline. This is helpful so that inputs
created from file.readlines() result in diffs that are suitable for
file.writelines() since both the inputs and outputs have trailing
newlines.
For inputs that do not have trailing newlines, set the lineterm
argument to "" so that the output will be uniformly newline free.
The context diff format normally has a header for filenames and
modification times. Any or all of these may be specified using
strings for 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
The modification times are normally expressed in the ISO 8601 format.
If not specified, the strings default to blanks.
Example:
>>> print(''.join(context_diff('one\ntwo\nthree\nfour\n'.splitlines(True),
... 'zero\none\ntree\nfour\n'.splitlines(True), 'Original', 'Current')),
... end="")
*** Original
--- Current
***************
*** 1,4 ****
one
! two
! three
four
--- 1,4 ----
+ zero
one
! tree
four
z+ z- z! z )rM rL rK rN FNTz {}r z
*** {}{}{}z
--- {}{}{}r
r% z***************r� z
*** {} ****{}c s s | ]\}}}}}|dkV qdS )rK rL N> rK rL r )rZ rR �_r r r r[ s z context_diff.<locals>.<genexpr>rM rT r� z
--- {} ----{}c s s | ]\}}}}}|dkV qdS )rK rM N> rM rK r )rZ rR r� r r r r[ s rL rU )r� �dictr rY r� r� �any)r r r� r� r� r� r3 r� �prefixr� rX r� r� rz r� r� rR rF rH r� rk r� rG rI r r r r � s4 ,
c G s� | r2t | d t� r2tdt| d �j| d f ��|rdt |d t� rdtdt|d �j|d f ��x$|D ] }t |t�sjtd|f ��qjW d S )Nr
z)lines to compare must be str, not %s (%r)z"all arguments must be str, not: %r)�
isinstance�str� TypeError�typer` )r r �args�argr r r r� s
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c c s� dd� } t t| |��}t t| |��}| |�}| |�}| |�}| |�}| |�}| ||||||||�}
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Compare `a` and `b`, two sequences of lines represented as bytes rather
than str. This is a wrapper for `dfunc`, which is typically either
unified_diff() or context_diff(). Inputs are losslessly converted to
strings so that `dfunc` only has to worry about strings, and encoded
back to bytes on return. This is necessary to compare files with
unknown or inconsistent encoding. All other inputs (except `n`) must be
bytes rather than str.
c S sP y | j dd�S tk
rJ } z"dt| �j| f }t|�|�W Y d d }~X nX d S )N�ascii�surrogateescapez(all arguments must be bytes, not %s (%r))�decode�AttributeErrorr� r` r� )rj �err�msgr r r r� - s zdiff_bytes.<locals>.decoder� r� N)r@ rA �encode) Zdfuncr r r� r� r� r� r3 r� r� �linesrk r r r r
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Compare `a` and `b` (lists of strings); return a `Differ`-style delta.
Optional keyword parameters `linejunk` and `charjunk` are for filter
functions, or can be None:
- linejunk: A function that should accept a single string argument and
return true iff the string is junk. The default is None, and is
recommended; the underlying SequenceMatcher class has an adaptive
notion of "noise" lines.
- charjunk: A function that accepts a character (string of length
1), and returns true iff the character is junk. The default is
the module-level function IS_CHARACTER_JUNK, which filters out
whitespace characters (a blank or tab; note: it's a bad idea to
include newline in this!).
Tools/scripts/ndiff.py is a command-line front-end to this function.
Example:
>>> diff = ndiff('one\ntwo\nthree\n'.splitlines(keepends=True),
... 'ore\ntree\nemu\n'.splitlines(keepends=True))
>>> print(''.join(diff), end="")
- one
? ^
+ ore
? ^
- two
- three
? -
+ tree
+ emu
)r rw )r r rn ro r r r r @ s #c # s� ddl }|jd��t| |||��ddgf�fdd� ���fdd�� � fdd �}|� }|dkrj|E dH �n.|d
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a� Returns generator yielding marked up from/to side by side differences.
Arguments:
fromlines -- list of text lines to compared to tolines
tolines -- list of text lines to be compared to fromlines
context -- number of context lines to display on each side of difference,
if None, all from/to text lines will be generated.
linejunk -- passed on to ndiff (see ndiff documentation)
charjunk -- passed on to ndiff (see ndiff documentation)
This function returns an iterator which returns a tuple:
(from line tuple, to line tuple, boolean flag)
from/to line tuple -- (line num, line text)
line num -- integer or None (to indicate a context separation)
line text -- original line text with following markers inserted:
'\0+' -- marks start of added text
'\0-' -- marks start of deleted text
'\0^' -- marks start of changed text
'\1' -- marks end of added/deleted/changed text
boolean flag -- None indicates context separation, True indicates
either "from" or "to" line contains a change, otherwise False.
This function/iterator was originally developed to generate side by side
file difference for making HTML pages (see HtmlDiff class for example
usage).
Note, this function utilizes the ndiff function to generate the side by
side difference markup. Optional ndiff arguments may be passed to this
function and they in turn will be passed to ndiff.
r
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(\++|\-+|\^+)c s� || d7 < |dkr2|| | j d�dd� fS |dkr�| j d�| j d� }}g }|fdd�}� j||� xHt|�D ]<\}\} }
|d| � d | || |
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d� }qvW |dd� }n*| j d�dd� }|s�d
}d| | d }|| |fS ) a Returns line of text with user's change markup and line formatting.
lines -- list of lines from the ndiff generator to produce a line of
text from. When producing the line of text to return, the
lines used are removed from this list.
format_key -- '+' return first line in list with "add" markup around
the entire line.
'-' return first line in list with "delete" markup around
the entire line.
'?' return first line in list with add/delete/change
intraline markup (indices obtained from second line)
None return first line in list with no markup
side -- indice into the num_lines list (0=from,1=to)
num_lines -- from/to current line number. This is NOT intended to be a
passed parameter. It is present as a keyword argument to
maintain memory of the current line numbers between calls
of this function.
Note, this function is purposefully not defined at the module scope so
that data it needs from its parent function (within whose context it
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r% Nr
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S )!a� Yields from/to lines of text with a change indication.
This function is an iterator. It itself pulls lines from a
differencing iterator, processes them and yields them. When it can
it yields both a "from" and a "to" line, otherwise it will yield one
or the other. In addition to yielding the lines of from/to text, a
boolean flag is yielded to indicate if the text line(s) have
differences in them.
Note, this function is purposefully not defined at the module scope so
that data it needs from its parent function (within whose context it
is defined) does not need to be of module scope.
r
r� �Xr c S s g | ] }|d �qS )r
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startswith)r� Znum_blanks_pendingZnum_blanks_to_yieldrj � from_line�to_line)r� �diff_lines_iteratorr r �_line_iterator� sf
$ z _mdiff.<locals>._line_iteratorc 3 s� � � } g g }}x�xpt |�dks,t |�dkr�yt| �\}}}W n tk
rR dS X |dk rj|j||f� |dk r|j||f� qW |jd�\}}|jd�\}}|||p�|fV qW dS )at Yields from/to lines of text with a change indication.
This function is an iterator. It itself pulls lines from the line
iterator. Its difference from that iterator is that this function
always yields a pair of from/to text lines (with the change
indication). If necessary it will collect single from/to lines
until it has a matching pair from/to pair to yield.
Note, this function is purposefully not defined at the module scope so
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r
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=%(charset)s" />
<title></title>
<style type="text/css">%(styles)s
</style>
</head>
<body>
%(table)s%(legend)s
</body>
</html>aH
table.diff {font-family:Courier; border:medium;}
.diff_header {background-color:#e0e0e0}
td.diff_header {text-align:right}
.diff_next {background-color:#c0c0c0}
.diff_add {background-color:#aaffaa}
.diff_chg {background-color:#ffff77}
.diff_sub {background-color:#ffaaaa}aZ
<table class="diff" id="difflib_chg_%(prefix)s_top"
cellspacing="0" cellpadding="0" rules="groups" >
<colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
<colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
%(header_row)s
<tbody>
%(data_rows)s </tbody>
</table>a�
<table class="diff" summary="Legends">
<tr> <th colspan="2"> Legends </th> </tr>
<tr> <td> <table border="" summary="Colors">
<tr><th> Colors </th> </tr>
<tr><td class="diff_add"> Added </td></tr>
<tr><td class="diff_chg">Changed</td> </tr>
<tr><td class="diff_sub">Deleted</td> </tr>
</table></td>
<td> <table border="" summary="Links">
<tr><th colspan="2"> Links </th> </tr>
<tr><td>(f)irst change</td> </tr>
<tr><td>(n)ext change</td> </tr>
<tr><td>(t)op</td> </tr>
</table></td> </tr>
</table>c @ s� e Zd ZdZeZeZeZeZdZddde fdd�Z
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dd� Zdd� Zdd� Zdd� Zdd� Zd d d �ZdS ) r a{ For producing HTML side by side comparison with change highlights.
This class can be used to create an HTML table (or a complete HTML file
containing the table) showing a side by side, line by line comparison
of text with inter-line and intra-line change highlights. The table can
be generated in either full or contextual difference mode.
The following methods are provided for HTML generation:
make_table -- generates HTML for a single side by side table
make_file -- generates complete HTML file with a single side by side table
See tools/scripts/diff.py for an example usage of this class.
r
� Nc C s || _ || _|| _|| _dS )a� HtmlDiff instance initializer
Arguments:
tabsize -- tab stop spacing, defaults to 8.
wrapcolumn -- column number where lines are broken and wrapped,
defaults to None where lines are not wrapped.
linejunk,charjunk -- keyword arguments passed into ndiff() (used by
HtmlDiff() to generate the side by side HTML differences). See
ndiff() documentation for argument default values and descriptions.
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wrapcolumnrn ro r r r r � s zHtmlDiff.__init__r F� zutf-8)�charsetc C s: | j t| j| j| j||||||d�|d� j|d�j|�S )a Returns HTML file of side by side comparison with change highlights
Arguments:
fromlines -- list of "from" lines
tolines -- list of "to" lines
fromdesc -- "from" file column header string
todesc -- "to" file column header string
context -- set to True for contextual differences (defaults to False
which shows full differences).
numlines -- number of context lines. When context is set True,
controls number of lines displayed before and after the change.
When context is False, controls the number of lines to place
the "next" link anchors before the next change (so click of
"next" link jumps to just before the change).
charset -- charset of the HTML document
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zHtmlDiff.make_filec s8 �fdd�� � fdd�|D �}� fdd�|D �}||fS )a Returns from/to line lists with tabs expanded and newlines removed.
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needed to fill in to the next tab stop, this function will fill
the space with tab characters. This is done so that the difference
algorithms can identify changes in a file when tabs are replaced by
spaces and vice versa. At the end of the HTML generation, the tab
characters will be replaced with a nonbreakable space.
c s6 | j dd�} | j� j�} | j dd�} | j dd�jd�S )Nrr r� r� r� )rK �
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z HtmlDiff._tab_newline_replacec C s |s|j ||f� dS t|�}| j}||ksB||jd�d |krT|j ||f� dS d}d}d}xd||k r�||k r�|| dkr�|d7 }|| }|d7 }qb|| dkr�|d7 }d}qb|d7 }|d7 }qbW |d|� } ||d� }
|r�| d } d| |
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|j || f� | j|d|
� dS ) a� Builds list of text lines by splitting text lines at wrap point
This function will determine if the input text line needs to be
wrapped (split) into separate lines. If so, the first wrap point
will be determined and the first line appended to the output
text line list. This function is used recursively to handle
the second part of the split line to further split it.
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filenames is a list of the names of the non-directory files in dirpath.
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import os
from os.path import join, getsize
for root, dirs, files in os.walk('python/Lib/email'):
print(root, "consumes", end="")
print(sum([getsize(join(root, name)) for name in files]), end="")
print("bytes in", len(files), "non-directory files")
if 'CVS' in dirs:
dirs.remove('CVS') # don't visit CVS directories
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'r|bz2' open a bzip2 compressed stream of tar blocks
'r|xz' open an lzma compressed stream of tar blocks
'w|' open an uncompressed stream for writing
'w|gz' open a gzip compressed stream for writing
'w|bz2' open a bzip2 compressed stream for writing
'w|xz' open an lzma compressed stream for writing
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rz r{ ro z mode must be 'r', 'w' or 'x'r Nzbz2 module is not available)r� znot a bzip2 fileF)rz r{ ro ) r. r� r� r ZBZ2Filer� r� �EOFErrorr� r r� )r1 r� rh r� r� r� r� r� r6 r6 r7 �bz2openc s( zTarFile.bz2openc K s� |d krt d��y ddl}W n tk
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rz r{ ro z mode must be 'r', 'w' or 'x'r Nz lzma module is not available)�presetznot an lzma fileF)rz r{ ro ) r. r� r� r ZLZMAFiler� r� r� r� r r� )r1 r� rh r� r� r� r� r� r6 r6 r7 �xzopen� s& zTarFile.xzopenr� r� r� r� )r� r� r� r� c
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a� Create a TarInfo object from the result of os.stat or equivalent
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r� Nr z use the filter argument insteadr$ ztarfile: Excluded %rztarfile: Skipped %rr# z tarfile: Unsupported type %rr� )r� )r� rc rd re �_dbgr� r} r% r� r� r� r� �addfiler� �listdir�addr� ) r� r� r� � recursiveZexcluder� rc r� �fr6 r6 r7 r� a sB
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r� N)r_ r r# )r� r r rP r4 r5 r� r[ r� r0 r� rX r' rY r� r1 r� r� )r� r� r� rT r_ r` ra r6 r6 r7 r� � s
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colorsys.cpython-36.opt-1.pyc 0000644 00000006361 15033571514 0012020 0 ustar 00 3
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All inputs and outputs are triples of floats in the range [0.0...1.0]
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lzma.cpython-36.pyc 0000644 00000027332 15033571514 0010150 0 ustar 00 3
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"x" for creating exclusively, or "a" for appending. These can
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format specifies the container format to use for the file.
If mode is "r", this defaults to FORMAT_AUTO. Otherwise, the
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check specifies the integrity check to use. This argument can
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When opening a file for reading, the *preset* argument is not
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When opening a file for writing, the settings used by the
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level. For FORMAT_RAW, the caller must always specify a filter
chain; the raw compressor does not support preset compression
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preset (if provided) should be an integer in the range 0-9,
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The mode argument can be "r", "rb" (default), "w", "wb", "x", "xb",
"a", or "ab" for binary mode, or "rt", "wt", "xt", or "at" for text
mode.
The format, check, preset and filters arguments specify the
compression settings, as for LZMACompressor, LZMADecompressor and
LZMAFile.
For binary mode, this function is equivalent to the LZMAFile
constructor: LZMAFile(filename, mode, ...). In this case, the
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b- _dummy_thread.cpython-36.pyc 0000644 00000011365 15033571514 0012025 0 ustar 00 3
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locked and owned by the calling thread.
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RuntimeError is raised if this method is called when the lock is
unlocked.
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z cannot release un-acquired lockr9 N)r* r � RuntimeErrorr+ r) �release)r, r r r r! r@ � s z_RLock.releasec C s | j � d S )N)r@ )r, �t�v�tbr r r! �__exit__� s z_RLock.__exit__c C s | j j� |\| _| _d S )N)r) r: r+ r* )r, �stater r r! �_acquire_restore� s
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is created and used as the underlying lock.
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variable in another thread, or until the optional timeout occurs. Once
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When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
When the underlying lock is an RLock, it is not released using its
release() method, since this may not actually unlock the lock when it
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variable; it is a no-op if no threads are waiting.
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zCondition.notifyc C s | j t| j�� dS )z�Wake up all threads waiting on this condition.
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blocks if necessary until it can return without making the counter
negative. If not given, value defaults to 1.
r9 c C s& |dk rt d��tt� �| _|| _d S )Nr z$semaphore initial value must be >= 0)rZ r r �_cond�_value)r, �valuer r r! r- � s zSemaphore.__init__TNc
C s� | r|dk rt d��d}d}| j�j xb| jdkrv|s8P |dk rh|dkrTt� | }n|t� }|dkrhP | jj|� q(W | jd8 _d}W dQ R X |S )a� Acquire a semaphore, decrementing the internal counter by one.
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zero on entry, decrement it by one and return immediately. If it is zero
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make it larger than zero. This is done with proper interlocking so that
if multiple acquire() calls are blocked, release() will wake exactly one
of them up. The implementation may pick one at random, so the order in
which blocked threads are awakened should not be relied on. There is no
return value in this case.
When invoked with blocking set to true, do the same thing as when called
without arguments, and return true.
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an argument would block, return false immediately; otherwise, do the
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most timeout seconds. If acquire does not complete successfully in
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C s. | j � | jd7 _| j j� W dQ R X dS )z�Release a semaphore, incrementing the internal counter by one.
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r9 N)rd re rb )r, r r r! r@ � s zSemaphore.releasec C s | j � d S )N)r@ )r, rA rB rC r r r! rD � s zSemaphore.__exit__)r9 )TN) rJ r3 r4 rK r- r: rL r@ rD r r r r! r � s
- c @ s" e Zd ZdZddd�Zdd� ZdS ) r a� Implements a bounded semaphore.
A bounded semaphore checks to make sure its current value doesn't exceed its
initial value. If it does, ValueError is raised. In most situations
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If the semaphore is released too many times it's a sign of a bug. If not
given, value defaults to 1.
Like regular semaphores, bounded semaphores manage a counter representing
the number of release() calls minus the number of acquire() calls, plus an
initial value. The acquire() method blocks if necessary until it can return
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r9 c C s t j| |� || _d S )N)r r- �_initial_value)r, rf r r r! r- � s zBoundedSemaphore.__init__c
C sB | j �2 | j| jkr td��| jd7 _| j j� W dQ R X dS )a6 Release a semaphore, incrementing the internal counter by one.
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to become larger than zero again, wake up that thread.
If the number of releases exceeds the number of acquires,
raise a ValueError.
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N)rd rh r] )r, r< Zsignaledr r r! r] ' s
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dd� �ZdS ) r z�Implements a Barrier.
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Nc C s. t t� �| _|| _|| _|| _d| _d| _dS )aW Create a barrier, initialised to 'parties' threads.
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Barrier._waitc C s( | j dkr$| jdkr$d| _| jj� d S )Nr r9 rI )rI r9 )r+ rp rd rc )r, r r r! rv � s
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Barrier._exitc C sT | j �D | jdkr6| jdkr$d| _q<| jdkr<d| _nd| _| j j� W dQ R X dS )z�Reset the barrier to the initial state.
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Barrier.resetc C s | j � | j� W dQ R X dS )z�Place the barrier into a 'broken' state.
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c @ s e Zd ZdS )r N)rJ r3 r4 r r r r! r � s � Thread-%dc C s
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*args* is the argument tuple for the target invocation. Defaults to ().
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zThread._bootstrap_innerc C s, | j }|d k r |j� s t�d| _d | _ d S )NT)r� r. rx r� )r, rQ r r r! �_stop� s
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zThread._deletec C sZ | j std��| jj� s td��| t� kr2td��|dkrD| j� n| jt|d�d� dS )a Wait until the thread terminates.
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thread is still alive, the join() call timed out.
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A thread can be join()ed many times.
join() raises a RuntimeError if an attempt is made to join the current
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z Thread.__init__() not calledz'cannot join thread before it is startedzcannot join current threadNr )r< )r� r? r� rj r �_wait_for_tstate_lock�max)r, r< r r r! �join s
z Thread.joinTr9 c C s: | j }|d kr| js6t�n |j||�r6|j� | j� d S )N)r� r� rx r: r@ r� )r, �blockr< rQ r r r! r� ; s z Thread._wait_for_tstate_lockc C s | j std��| jS )z�A string used for identification purposes only.
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|| _ d S )N)r� )r, r� r r r! � setDaemon� s zThread.setDaemonc C s | j S )N)r0 )r, r r r! �getName� s zThread.getNamec C s
|| _ d S )N)r0 )r, r0 r r r! �setName� s zThread.setName)NrI )TrI ) rJ r3 r4 rK r� r� �exc_infor� r- ri r8 r� r� r� r� r� r� r� r� r� r� r� r0 �setterr� r� ZisAliver� r� r� r� r� r r r r! r � s8 , A#
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C sD t j| td�dd� | jj� | j� t� | t| j< W d Q R X d S )NzDummy-%dT)r0 r� ) r r- r� r� rk r� r� r/ r� )r, r r r! r- � s
z_DummyThread.__init__c C s d S )Nr )r, r r r! r� � s z_DummyThread._stopc C s | j r| jj� st�dS )NT)r� r� rj rx )r, r r r! r� � s z_DummyThread.is_aliveNc C s ds t d��d S )NFzcannot join a dummy thread)rx )r, r< r r r! r� � s z_DummyThread.join)N)rJ r3 r4 r- r� r� r� r r r r! r� � s r� c C s& y
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Object for wrapping/filling text. The public interface consists of
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subclasses to override in order to tweak the default behaviour.
If you want to completely replace the main wrapping algorithm,
you'll probably have to override _wrap_chunks().
Several instance attributes control various aspects of wrapping:
width (default: 70)
the maximum width of wrapped lines (unless break_long_words
is false)
initial_indent (default: "")
string that will be prepended to the first line of wrapped
output. Counts towards the line's width.
subsequent_indent (default: "")
string that will be prepended to all lines save the first
of wrapped output; also counts towards each line's width.
expand_tabs (default: true)
Expand tabs in input text to spaces before further processing.
Each tab will become 0 .. 'tabsize' spaces, depending on its position
in its line. If false, each tab is treated as a single character.
tabsize (default: 8)
Expand tabs in input text to 0 .. 'tabsize' spaces, unless
'expand_tabs' is false.
replace_whitespace (default: true)
Replace all whitespace characters in the input text by spaces
after tab expansion. Note that if expand_tabs is false and
replace_whitespace is true, every tab will be converted to a
single space!
fix_sentence_endings (default: false)
Ensure that sentence-ending punctuation is always followed
by two spaces. Off by default because the algorithm is
(unavoidably) imperfect.
break_long_words (default: true)
Break words longer than 'width'. If false, those words will not
be broken, and some lines might be longer than 'width'.
break_on_hyphens (default: true)
Allow breaking hyphenated words. If true, wrapping will occur
preferably on whitespaces and right after hyphens part of
compound words.
drop_whitespace (default: true)
Drop leading and trailing whitespace from lines.
max_lines (default: None)
Truncate wrapped lines.
placeholder (default: ' [...]')
Append to the last line of truncated text.
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�selfr r r r r r r r r r r r � r � /usr/lib64/python3.6/textwrap.py�__init__s s zTextWrapper.__init__c C s( | j r|j| j�}| jr$|j| j�}|S )z�_munge_whitespace(text : string) -> string
Munge whitespace in text: expand tabs and convert all other
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z TextWrapper._munge_whitespacec C s6 | j dkr| jj|�}n | jj|�}dd� |D �}|S )aN _split(text : string) -> [string]
Split the text to wrap into indivisible chunks. Chunks are
not quite the same as words; see _wrap_chunks() for full
details. As an example, the text
Look, goof-ball -- use the -b option!
breaks into the following chunks:
'Look,', ' ', 'goof-', 'ball', ' ', '--', ' ',
'use', ' ', 'the', ' ', '-b', ' ', 'option!'
if break_on_hyphens is True, or in:
'Look,', ' ', 'goof-ball', ' ', '--', ' ',
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otherwise.
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Correct for sentence endings buried in 'chunks'. Eg. when the
original text contains "... foo.\nBar ...", munge_whitespace()
and split() will convert that to [..., "foo.", " ", "Bar", ...]
which has one too few spaces; this method simply changes the one
space to two.
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Wrap a sequence of text chunks and return a list of lines of
length 'self.width' or less. (If 'break_long_words' is false,
some lines may be longer than this.) Chunks correspond roughly
to words and the whitespace between them: each chunk is
indivisible (modulo 'break_long_words'), but a line break can
come between any two chunks. Chunks should not have internal
whitespace; ie. a chunk is either all whitespace or a "word".
Whitespace chunks will be removed from the beginning and end of
lines, but apart from that whitespace is preserved.
r z invalid width %r (must be > 0)Nr z#placeholder too large for max widthr r1 r1 r1 r1 r1 r1 r1 r1 r1 r1 r1 r1 )r �
ValueErrorr r r r. r �lstrip�reverser �stripr2 r3 r6 �sum�map�join�rstrip) r r) �linesr r4 r5 r �lZ prev_liner r r � _wrap_chunks� sp
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Reformat the single paragraph in 'text' so it fits in lines of
no more than 'self.width' columns, and return a list of wrapped
lines. Tabs in 'text' are expanded with string.expandtabs(),
and all other whitespace characters (including newline) are
converted to space.
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!gr c K s t f d|i|��}|j| �S )a� Wrap a single paragraph of text, returning a list of wrapped lines.
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c K s t f d|i|��}|j| �S )a� Fill a single paragraph of text, returning a new string.
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r )r r )r! r rO rP r r r r } s c K s, t f |dd�|��}|jdj| j� j� ��S )a� Collapse and truncate the given text to fit in the given width.
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'Hello world!'
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'Hello [...]'
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derived classes can override selectively; the default implementations
represent a file that cannot be read, written or seeked.
Even though IOBase does not declare read, readinto, or write because
their signatures will vary, implementations and clients should
consider those methods part of the interface. Also, implementations
may raise UnsupportedOperation when operations they do not support are
called.
The basic type used for binary data read from or written to a file is
bytes. Other bytes-like objects are accepted as method arguments too. In
some cases (such as readinto), a writable object is required. Text I/O
classes work with str data.
Note that calling any method (even inquiries) on a closed stream is
undefined. Implementations may raise OSError in this case.
IOBase (and its subclasses) support the iterator protocol, meaning
that an IOBase object can be iterated over yielding the lines in a
stream.
IOBase also supports the :keyword:`with` statement. In this example,
fp is closed after the suite of the with statement is complete:
with open('spam.txt', 'r') as fp:
fp.write('Spam and eggs!')
c C s t d| jj|f ��dS )z@Internal: raise an OSError exception for unsupported operations.z%s.%s() not supportedN)rP � __class__rH )rD �namer? r? r@ � _unsupported@ s zIOBase._unsupportedr c C s | j d� dS )a$ Change stream position.
Change the stream position to byte offset pos. Argument pos is
interpreted relative to the position indicated by whence. Values
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* 0 -- start of stream (the default); offset should be zero or positive
* 1 -- current stream position; offset may be negative
* 2 -- end of stream; offset is usually negative
Some operating systems / file systems could provide additional values.
Return an int indicating the new absolute position.
�seekN)rT )rD �pos�whencer? r? r@ rU G s z IOBase.seekc C s | j dd�S )z5Return an int indicating the current stream position.r r
)rU )rD r? r? r@ �tellW s z IOBase.tellNc C s | j d� dS )z�Truncate file to size bytes.
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�truncateN)rT )rD rV r? r? r@ rY [ s zIOBase.truncatec C s | j � dS )zuFlush write buffers, if applicable.
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N)� _checkClosed)rD r? r? r@ �flushe s z IOBase.flushFc C s | j s z | j� W dd| _ X dS )ziFlush and close the IO object.
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NT)�_IOBase__closedr[ )rD r? r? r@ r3 o s z IOBase.closec C s y | j � W n Y nX dS )zDestructor. Calls close().N)r3 )rD r? r? r@ �__del__z s zIOBase.__del__c C s dS )z�Return a bool indicating whether object supports random access.
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Fr? )rD r? r? r@ �seekable� s zIOBase.seekablec C s | j � s t|dkrdn|��dS )zEInternal: raise UnsupportedOperation if file is not seekable
Nz File or stream is not seekable.)r^ rP )rD �msgr? r? r@ �_checkSeekable� s zIOBase._checkSeekablec C s dS )zvReturn a bool indicating whether object was opened for reading.
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Fr? )rD r? r? r@ �readable� s zIOBase.readablec C s | j � s t|dkrdn|��dS )zEInternal: raise UnsupportedOperation if file is not readable
Nz File or stream is not readable.)ra rP )rD r_ r? r? r@ �_checkReadable� s zIOBase._checkReadablec C s dS )z�Return a bool indicating whether object was opened for writing.
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Fr? )rD r? r? r@ �writable� s zIOBase.writablec C s | j � s t|dkrdn|��dS )zEInternal: raise UnsupportedOperation if file is not writable
Nz File or stream is not writable.)rc rP )rD r_ r? r? r@ �_checkWritable� s zIOBase._checkWritablec C s | j S )z�closed: bool. True iff the file has been closed.
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)r\ )rD r? r? r@ �closed� s z
IOBase.closedc C s | j rt|dkrdn|��dS )z7Internal: raise a ValueError if file is closed
Nz I/O operation on closed file.)re r" )rD r_ r? r? r@ rZ � s zIOBase._checkClosedc C s | j � | S )zCContext management protocol. Returns self (an instance of IOBase).)rZ )rD r? r? r@ � __enter__� s zIOBase.__enter__c G s | j � dS )z+Context management protocol. Calls close()N)r3 )rD rM r? r? r@ �__exit__� s zIOBase.__exit__c C s | j d� dS )z�Returns underlying file descriptor (an int) if one exists.
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r* N)rT )rD r? r? r@ r* � s z
IOBase.filenoc C s | j � dS )z{Return a bool indicating whether this is an 'interactive' stream.
Return False if it can't be determined.
F)rZ )rD r? r? r@ r' � s z
IOBase.isattyr
c s� t � d�r� �fdd�}ndd� }�dkr0d
�nt�t�sBtd��t� }x>�dk s^t|��k r�� j|� �}|spP ||7 }|jd �rJP qJW t|�S ) aN Read and return a line of bytes from the stream.
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Size should be an int.
The line terminator is always b'\n' for binary files; for text
files, the newlines argument to open can be used to select the line
terminator(s) recognized.
�peekc s> � j d�} | sdS | jd�d p&t| �}�dkr:t|��}|S )Nr
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zsize must be an integerr ri r ) �hasattrr r r � bytearrayr! �read�endswithr )rD rm rn �resr r? )rD rm r@ �readline� s
zIOBase.readlinec C s | j � | S )N)rZ )rD r? r? r@ �__iter__ s zIOBase.__iter__c C s | j � }|st�|S )N)rt �
StopIteration)rD �liner? r? r@ �__next__ s zIOBase.__next__c C sR |dks|dkrt | �S d}g }x,| D ]$}|j|� |t|�7 }||kr&P q&W |S )z�Return a list of lines from the stream.
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Nr )�list�appendr! )rD Zhintrl �linesrw r? r? r@ � readlines s
zIOBase.readlinesc C s$ | j � x|D ]}| j|� qW d S )N)rZ �write)rD r{ rw r? r? r@ �
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zIOBase.writelines)r )N)N)N)N)Nr )r )N) rH rI rJ rC rT rU rX rY r[ r\ r3 r] r^ r` ra rb rc rd �propertyre rZ rf rg r* r' rt ru rx r| r~ r? r? r? r@ rQ s4
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c C sP |dkr d}|dk r | j � S t|j� �}| j|�}|dkr>dS ||d�= t|�S )z�Read and return up to size bytes, where size is an int.
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zRawIOBase.readallc C s | j d� dS )z�Read bytes into a pre-allocated bytes-like object b.
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r� N)rT )rD r r? r? r@ r� X s zRawIOBase.readintoc C s | j d� dS )z�Write the given buffer to the IO stream.
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r} N)rT )rD r r? r? r@ r} ` s zRawIOBase.writeNr )r )rH rI rJ rC rq r� r� r} r? r? r? r@ r� + s
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dS )�BufferedIOBasea Base class for buffered IO objects.
The main difference with RawIOBase is that the read() method
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mode and not ready; unlike their raw counterparts, they will never
return None.
A typical implementation should not inherit from a RawIOBase
implementation, but wrap one.
Nc C s | j d� dS )a� Read and return up to size bytes, where size is an int.
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the byte count (unless EOF is reached first). But for
interactive raw streams (XXX and for pipes?), at most one raw
read will be issued, and a short result does not imply that
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rq N)rT )rD rm r? r? r@ rq ~ s zBufferedIOBase.readc C s | j d� dS )zaRead up to size bytes with at most one read() system call,
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�read1N)rT )rD rm r? r? r@ r� � s zBufferedIOBase.read1c C s | j |dd�S )af Read bytes into a pre-allocated bytes-like object b.
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F)r� )� _readinto)rD r r? r? r@ r� � s zBufferedIOBase.readintoc C s | j |dd�S )z�Read bytes into buffer *b*, using at most one system call
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T)r� )r� )rD r r? r? r@ � readinto1� s zBufferedIOBase.readinto1c C sV t |t�st|�}|jd�}|r0| jt|��}n| jt|��}t|�}||d |�< |S )N�B)r �
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zBufferedIOBase._readintoc C s | j d� dS )a Write the given bytes buffer to the IO stream.
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r} N)rT )rD r r? r? r@ r} � s zBufferedIOBase.writec C s | j d� dS )z�
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�detachN)rT )rD r? r? r@ r� � s zBufferedIOBase.detach)N)N) rH rI rJ rC rq r� r� r� r� r} r� r? r? r? r@ r� m s
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|| _ d S )N)�_raw)rD r; r? r? r@ �__init__� s z_BufferedIOMixin.__init__r c C s" | j j||�}|dk r td��|S )Nr z#seek() returned an invalid position)r; rU r, )rD rV rW Z new_positionr? r? r@ rU � s z_BufferedIOMixin.seekc C s | j j� }|dk rtd��|S )Nr z#tell() returned an invalid position)r; rX r, )rD rV r? r? r@ rX � s
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r2 dS X dS )a Write bytes b to file, return number written.
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c C s | j d� dS )z�Read at most size characters from stream, where size is an int.
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rq N)rT )rD rm r? r? r@ rq � s zTextIOBase.readc C s | j d� dS )z.Write string s to stream and returning an int.r} N)rT )rD �sr? r? r@ r} � s zTextIOBase.writeNc C s | j d� dS )z*Truncate size to pos, where pos is an int.rY N)rT )rD rV r? r? r@ rY � s zTextIOBase.truncatec C s | j d� dS )z_Read until newline or EOF.
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�strictc C s, t jj| |d� || _|| _d| _d| _d S )N)r7 r F)�codecs�IncrementalDecoderr� � translate�decoder�seennl� pendingcr)rD r� r� r7 r? r? r@ r� s
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This module provides some more Pythonic support for SSL.
Object types:
SSLSocket -- subtype of socket.socket which does SSL over the socket
Exceptions:
SSLError -- exception raised for I/O errors
Functions:
cert_time_to_seconds -- convert time string used for certificate
notBefore and notAfter functions to integer
seconds past the Epoch (the time values
returned from time.time())
fetch_server_certificate (HOST, PORT) -- fetch the certificate provided
by the server running on HOST at port PORT. No
validation of the certificate is performed.
Integer constants:
SSL_ERROR_ZERO_RETURN
SSL_ERROR_WANT_READ
SSL_ERROR_WANT_WRITE
SSL_ERROR_WANT_X509_LOOKUP
SSL_ERROR_SYSCALL
SSL_ERROR_SSL
SSL_ERROR_WANT_CONNECT
SSL_ERROR_EOF
SSL_ERROR_INVALID_ERROR_CODE
The following group define certificate requirements that one side is
allowing/requiring from the other side:
CERT_NONE - no certificates from the other side are required (or will
be looked at if provided)
CERT_OPTIONAL - certificates are not required, but if provided will be
validated, and if validation fails, the connection will
also fail
CERT_REQUIRED - certificates are required, and will be validated, and
if validation fails, the connection will also fail
The following constants identify various SSL protocol variants:
PROTOCOL_SSLv2
PROTOCOL_SSLv3
PROTOCOL_SSLv23
PROTOCOL_TLS
PROTOCOL_TLS_CLIENT
PROTOCOL_TLS_SERVER
PROTOCOL_TLSv1
PROTOCOL_TLSv1_1
PROTOCOL_TLSv1_2
The following constants identify various SSL alert message descriptions as per
http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-6
ALERT_DESCRIPTION_CLOSE_NOTIFY
ALERT_DESCRIPTION_UNEXPECTED_MESSAGE
ALERT_DESCRIPTION_BAD_RECORD_MAC
ALERT_DESCRIPTION_RECORD_OVERFLOW
ALERT_DESCRIPTION_DECOMPRESSION_FAILURE
ALERT_DESCRIPTION_HANDSHAKE_FAILURE
ALERT_DESCRIPTION_BAD_CERTIFICATE
ALERT_DESCRIPTION_UNSUPPORTED_CERTIFICATE
ALERT_DESCRIPTION_CERTIFICATE_REVOKED
ALERT_DESCRIPTION_CERTIFICATE_EXPIRED
ALERT_DESCRIPTION_CERTIFICATE_UNKNOWN
ALERT_DESCRIPTION_ILLEGAL_PARAMETER
ALERT_DESCRIPTION_UNKNOWN_CA
ALERT_DESCRIPTION_ACCESS_DENIED
ALERT_DESCRIPTION_DECODE_ERROR
ALERT_DESCRIPTION_DECRYPT_ERROR
ALERT_DESCRIPTION_PROTOCOL_VERSION
ALERT_DESCRIPTION_INSUFFICIENT_SECURITY
ALERT_DESCRIPTION_INTERNAL_ERROR
ALERT_DESCRIPTION_USER_CANCELLED
ALERT_DESCRIPTION_NO_RENEGOTIATION
ALERT_DESCRIPTION_UNSUPPORTED_EXTENSION
ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
ALERT_DESCRIPTION_UNRECOGNIZED_NAME
ALERT_DESCRIPTION_BAD_CERTIFICATE_STATUS_RESPONSE
ALERT_DESCRIPTION_BAD_CERTIFICATE_HASH_VALUE
ALERT_DESCRIPTION_UNKNOWN_PSK_IDENTITY
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d2dd�Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd3d*d+�Zd,d-� Zd.d/� ZdS )4r� a This class implements an interface on top of a low-level SSL object as
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This class does not have a public constructor. Instances are returned by
``SSLContext.wrap_bio``. This class is typically used by framework authors
that want to implement asynchronous IO for SSL through memory buffers.
When compared to ``SSLSocket``, this object lacks the following features:
* Any form of network IO, including methods such as ``recv`` and ``send``.
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Suppose you have some data that you want to convert to another format,
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uuencode). Some of the conversion steps may require that their input
is a disk file, others may be able to read standard input; similar for
their output. The input to the entire conversion may also be read
from a disk file or from an open file, and similar for its output.
The module lets you construct a pipeline template by sticking one or
more conversion steps together. It will take care of creating and
removing temporary files if they are necessary to hold intermediate
data. You can then use the template to do conversions from many
different sources to many different destinations. The temporary
file names used are different each time the template is used.
The templates are objects so you can create templates for many
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instance.
Directions:
-----------
To create a template:
t = Template()
To add a conversion step to a template:
t.append(command, kind)
where kind is a string of two characters: the first is '-' if the
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second likewise for the output. The command must be valid /bin/sh
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To add a conversion step at the beginning:
t.prepend(command, kind)
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sts = t.copy(infile, outfile)
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or append 'a'.
compression: ZIP_STORED (no compression), ZIP_DEFLATED (requires zlib),
ZIP_BZIP2 (requires bz2) or ZIP_LZMA (requires lzma).
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be necessary.
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object.
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write to a file newly added to the archive.
pwd is the password to decrypt files (only used for reading).
When writing, if the file size is not known in advance but may exceed
2 GiB, pass force_zip64 to use the ZIP64 format, which can handle large
files. If the size is known in advance, it is best to pass a ZipInfo
instance for name, with zinfo.file_size set.
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t j|�}| j|||�S )a# Extract a member from the archive to the current working directory,
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rC c C s t j| |� d| _d S )NrG )r rI rH )r9 rF r: r: r; rI � s z#BufferedIncrementalEncoder.__init__c C s t �d S )N)rD )r9 rE rF rJ r: r: r; �_buffer_encode� s z)BufferedIncrementalEncoder._buffer_encodeFc C s0 | j | }| j|| j|�\}}||d � | _ |S )N)rH rP rF )r9 rE rJ �data�result�consumedr: r: r; r# � s
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An IncrementalDecoder decodes an input in multiple steps. The input can
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N)rD )r9 rE rJ r: r: r; r$
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Reset the decoder to the initial state.
Nr: )r9 r: r: r; rK s zIncrementalDecoder.resetc C s dS )a
Return the current state of the decoder.
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buffered_input must be a bytes object containing bytes that
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processed the contents of buffered_input. In the initial state
and after reset(), getstate() must return (b"", 0).
� r )rT r r: )r9 r: r: r; rL s zIncrementalDecoder.getstatec C s dS )z�
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Nr: )r9 rM r: r: r; rN & s zIncrementalDecoder.setstateN)rC )F) rA r= r> rB rI r$ rK rL rN r: r: r: r; r � s
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rC c C s t j| |� d| _d S )NrT )r rI rH )r9 rF r: r: r; rI 4 s z#BufferedIncrementalDecoder.__init__c C s t �d S )N)rD )r9 rE rF rJ r: r: r; �_buffer_decode9 s z)BufferedIncrementalDecoder._buffer_decodeFc C s0 | j | }| j|| j|�\}}||d � | _ |S )N)rH rV rF )r9 rE rJ rQ rR rS r: r: r; r$ > s
z!BufferedIncrementalDecoder.decodec C s t j| � d| _d S )NrT )r rK rH )r9 r: r: r; rK F s
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| j dfS )Nr )rH )r9 r: r: r; rL J s z#BufferedIncrementalDecoder.getstatec C s |d | _ d S )Nr )rH )r9 rM r: r: r; rN N s z#BufferedIncrementalDecoder.setstateN)rC )F)
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dd� Z dS )r rC c C s || _ || _dS )aw Creates a StreamWriter instance.
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'ignore' - ignore the character and continue with the next
'replace'- replace with a suitable replacement character
'xmlcharrefreplace' - Replace with the appropriate XML
character reference.
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N)�streamrF )r9 rW rF r: r: r; rI [ s zStreamWriter.__init__c C s" | j || j�\}}| jj|� dS )z> Writes the object's contents encoded to self.stream.
N)r# rF rW �write)r9 �objectrQ rS r: r: r; rX t s zStreamWriter.writec C s | j dj|�� dS )z[ Writes the concatenated list of strings to the stream
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rG N)rX �join)r9 �listr: r: r; �
writelines{ s zStreamWriter.writelinesc C s dS )a5 Flushes and resets the codec buffers used for keeping state.
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Nr: )r9 r: r: r; rK � s
zStreamWriter.resetr c C s* | j j||� |dkr&|dkr&| j� d S )Nr )rW �seekrK )r9 �offset�whencer: r: r; r] � s zStreamWriter.seekc C s || j |�S )z? Inherit all other methods from the underlying stream.
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S )a� Decodes data from the stream self.stream and returns the
resulting object.
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size indicates the approximate maximum number of decoded
bytes or code points to read for decoding. The decoder
can modify this setting as appropriate. The default value
-1 indicates to read and decode as much as possible. size
is intended to prevent having to decode huge files in one
step.
If firstline is true, and a UnicodeDecodeError happens
after the first line terminator in the input only the first line
will be returned, the rest of the input will be kept until the
next call to read().
The method should use a greedy read strategy, meaning that
it should read as much data as is allowed within the
definition of the encoding and the given size, e.g. if
optional encoding endings or state markers are available
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Nr T)�keependsrm )
rl rj rZ rk �lenrW �readrh r$ rF �UnicodeDecodeError�start�
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zStreamReader.readNTc C s� | j rP| j d }| j d= t| j �dkr8| j d | _d| _ |sL|jdd�d }|S |pVd}| j}�xr| j|dd�}|r�t|t�r�|jd �s�t|t �r�|jd
�r�|| jddd �7 }||7 }|jdd�}|�r�t|�dk�r:|d }|d= t|�dk�r|d | j7 < || _ d| _n|d | j | _|�s8|jdd�d }P |d }|d jdd�d }||k�r�| jj
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9 }qbW |S )z� Read one line from the input stream and return the
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zStreamReader.readlinec C s | j � }|j|�S )aS Read all lines available on the input stream
and return them as a list.
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method and are included in the list entries.
sizehint, if given, is ignored since there is no efficient
way to finding the true end-of-line.
)rp rs )r9 �sizehintrn rQ r: r: r; � readlines] s zStreamReader.readlinesc C s d| _ | j| _d| _dS )z� Resets the codec buffers used for keeping state.
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rT N)rh rj rk rl )r9 r: r: r; rK l s zStreamReader.resetr c C s | j j||� | j� dS )zp Set the input stream's current position.
Resets the codec buffers used for keeping state.
N)rW r] rK )r9 r^ r_ r: r: r; r] y s zStreamReader.seekc C s | j � }|r|S t�dS )z4 Return the next decoded line from the input stream.N)r� �
StopIteration)r9 r� r: r: r; �__next__� s zStreamReader.__next__c C s | S )Nr: )r9 r: r: r; �__iter__� s zStreamReader.__iter__c C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra � s zStreamReader.__getattr__c C s | S )Nr: )r9 r: r: r; rb � s zStreamReader.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg � s zStreamReader.__exit__)rC )rC r� r� )r� r� F)NT)NT)r )rA r= r> r� ri rI r$ rp r� r� rK r] r� r� r` ra rb rg r: r: r: r; r � s
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dd� Z dd� Z dd� Z
d&dd�Zefdd �Zd d � Zd d � Zd S )'r a StreamReaderWriter instances allow wrapping streams which
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returned by the codec.lookup() function to construct the
instance.
�unknownrC c C s( || _ |||�| _|||�| _|| _dS )aR Creates a StreamReaderWriter instance.
stream must be a Stream-like object.
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StreamWriter/Readers.
N)rW �reader�writerrF )r9 rW �Reader�WriterrF r: r: r; rI � s
zStreamReaderWriter.__init__rm c C s | j j|�S )N)r� rp )r9 rt r: r: r; rp � s zStreamReaderWriter.readNc C s | j j|�S )N)r� r� )r9 rt r: r: r; r� � s zStreamReaderWriter.readlinec C s | j j|�S )N)r� r� )r9 r� r: r: r; r� � s z StreamReaderWriter.readlinesc C s
t | j�S )z4 Return the next decoded line from the input stream.)�nextr� )r9 r: r: r; r� � s zStreamReaderWriter.__next__c C s | S )Nr: )r9 r: r: r; r� � s zStreamReaderWriter.__iter__c C s | j j|�S )N)r� rX )r9 rQ r: r: r; rX � s zStreamReaderWriter.writec C s | j j|�S )N)r� r\ )r9 r[ r: r: r; r\ � s z StreamReaderWriter.writelinesc C s | j j� | jj� d S )N)r� rK r� )r9 r: r: r; rK � s
zStreamReaderWriter.resetr c C s6 | j j||� | jj� |dkr2|dkr2| jj� d S )Nr )rW r] r� rK r� )r9 r^ r_ r: r: r; r] � s
zStreamReaderWriter.seekc C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra � s z StreamReaderWriter.__getattr__c C s | S )Nr: )r9 r: r: r; rb � s z StreamReaderWriter.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg � s zStreamReaderWriter.__exit__)rC r� )r� )N)N)r )rA r= r> rB �encodingrI rp r� r� r� r� rX r\ rK r] r` ra rb rg r: r: r: r; r � s
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dd� Zefdd�Zdd� Zd d � Zd S )#r aB StreamRecoder instances translate data from one encoding to another.
They use the complete set of APIs returned by the
codecs.lookup() function to implement their task.
Data written to the StreamRecoder is first decoded into an
intermediate format (depending on the "decode" codec) and then
written to the underlying stream using an instance of the provided
Writer class.
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a Reader instance and then encoded and returned to the caller.
r� rC c C s4 || _ || _|| _|||�| _|||�| _|| _dS )a� Creates a StreamRecoder instance which implements a two-way
conversion: encode and decode work on the frontend (the
data visible to .read() and .write()) while Reader and Writer
work on the backend (the data in stream).
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transcodings from e.g. latin-1 to utf-8 and back.
stream must be a file-like object.
encode and decode must adhere to the Codec interface; Reader and
Writer must be factory functions or classes providing the
StreamReader and StreamWriter interfaces resp.
Error handling is done in the same way as defined for the
StreamWriter/Readers.
N)rW r# r$ r� r� rF )r9 rW r# r$ r� r� rF r: r: r; rI s zStreamRecoder.__init__rm c C s" | j j|�}| j|| j�\}}|S )N)r� rp r# rF )r9 rt rQ � bytesencodedr: r: r; rp " s zStreamRecoder.readNc C s6 |d kr| j j� }n | j j|�}| j|| j�\}}|S )N)r� r� r# rF )r9 rt rQ r� r: r: r; r� ( s
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zStreamRecoder.readlinesc C s t | j�}| j|| j�\}}|S )z4 Return the next decoded line from the input stream.)r� r� r# rF )r9 rQ r� r: r: r; r� 7 s
zStreamRecoder.__next__c C s | S )Nr: )r9 r: r: r; r� > s zStreamRecoder.__iter__c C s | j || j�\}}| jj|�S )N)r$ rF r� rX )r9 rQ � bytesdecodedr: r: r; rX A s zStreamRecoder.writec C s( dj |�}| j|| j�\}}| jj|�S )NrG )rZ r$ rF r� rX )r9 r[ rQ r� r: r: r; r\ F s
zStreamRecoder.writelinesc C s | j j� | jj� d S )N)r� rK r� )r9 r: r: r; rK L s
zStreamRecoder.resetc C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra Q s zStreamRecoder.__getattr__c C s | S )Nr: )r9 r: r: r; rb X s zStreamRecoder.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg [ s zStreamRecoder.__exit__)rC r� )r� )N)N)rA r= r> rB �
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�rrC rm c C sV |dk rd|kr|d }t j| ||�}|dkr2|S t|�}t||j|j|�}||_|S )a> Open an encoded file using the given mode and return
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defined by the codecs, i.e. Unicode objects for most builtin
codecs. Output is also codec dependent and will usually be
Unicode as well.
Underlying encoded files are always opened in binary mode.
The default file mode is 'r', meaning to open the file in read mode.
encoding specifies the encoding which is to be used for the
file.
errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
buffering has the same meaning as for the builtin open() API.
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.encoding which allows querying the used encoding. This
attribute is only available if an encoding was specified as
parameter.
N�b)�builtinsr r r r7 r6 r� )�filename�moder� rF � buffering�file�info�srwr: r: r; r ` s c C sF |dkr |}t |�}t |�}t| |j|j|j|j|�}||_||_|S )a� Return a wrapped version of file which provides transparent
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Bytes read from the file are decoded using file_encoding and then
passed back to the caller encoded using data_encoding.
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errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
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parameters of the same name. The attributes can be used for
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t | �jS )z� Lookup up the codec for the given encoding and return
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t | �jS )z� Lookup up the codec for the given encoding and return
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)r r$ )r� r: r: r; r � s c C s t | �j}|dkrt| ��|S )z� Lookup up the codec for the given encoding and return
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c C s t | �j}|dkrt| ��|S )z� Lookup up the codec for the given encoding and return
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)r r7 )r� r: r: r; r! � s c C s
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)r r6 )r� r: r: r; r" � s c k sL t |�|f|�}x | D ]}|j|�}|r|V qW |jdd�}|rH|V dS )z�
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<dictcomp>" s z&make_identity_dict.<locals>.<dictcomp>r: )�rngr: r: r; �make_identity_dict s r� c C s8 i }x.| j � D ]"\}}||kr(|||< qd||< qW |S )a� Creates an encoding map from a decoding map.
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ipaddress.cpython-36.opt-1.pyc 0000644 00000177050 15033571514 0012125 0 ustar 00 3
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r s r c C sT yt | �S ttfk
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rB Y nX td| ��dS )a� Take an IP string/int and return an object of the correct type.
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An IPv4Address or IPv6Address object.
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rB Y nX td| ��dS )ag Take an IP string/int and return an object of the correct type.
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address: A string or integer, the IP address. Either IPv4 or
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Returns:
An IPv4Interface or IPv6Interface object.
Raises:
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Notes:
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� ip_interfaceW s r c C s. y | j dd�S tk
r( td��Y nX dS )a` Represent an address as 4 packed bytes in network (big-endian) order.
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r/ c C s$ | dkr |S t || | d @ j� �S )z�Count the number of zero bits on the right hand side.
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�_count_righthand_zero_bits� s r3 c c s� t | t�ot |t�s td��| j|jkr8td| |f ��| |krHtd��| jdkrXt}n| jdkrht}ntd��| j}| j}|j}x^||kr�t t
||�|| d j � d �}|||| f�}|V |d|> 7 }|d |j kr�P q�W dS ) a� Summarize a network range given the first and last IP addresses.
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>>> list(summarize_address_range(IPv4Address('192.0.2.0'),
... IPv4Address('192.0.2.130')))
... #doctest: +NORMALIZE_WHITESPACE
[IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'),
IPv4Network('192.0.2.130/32')]
Args:
first: the first IPv4Address or IPv6Address in the range.
last: the last IPv4Address or IPv6Address in the range.
Returns:
An iterator of the summarized IPv(4|6) network objects.
Raise:
TypeError:
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ValueError:
If the last object is not greater than the first.
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r< c c s� t | �}i }xL|rX|j� }|j� }|j|�}|dkr>|||< q||kr||= |j|� qW d}x4t|j� �D ]$}|dk r�|j|jkr�ql|V |}qlW dS )au Loops through the addresses, collapsing concurrent netblocks.
Example:
ip1 = IPv4Network('192.0.2.0/26')
ip2 = IPv4Network('192.0.2.64/26')
ip3 = IPv4Network('192.0.2.128/26')
ip4 = IPv4Network('192.0.2.192/26')
_collapse_addresses_internal([ip1, ip2, ip3, ip4]) ->
[IPv4Network('192.0.2.0/24')]
This shouldn't be called directly; it is called via
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Args:
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rF c C s8 g }g }g }x�| D ]�}t |t�rT|rH|d j|jkrHtd||d f ��|j|� q|j|jkr�|r�|d j|jkr�td||d f ��y|j|j� W q� tk
r� |j|j � Y q�X q|r�|d j|jkr�td||d f ��|j|� qW t
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Args:
addresses: An iterator of IPv4Network or IPv6Network objects.
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rT c @ s� e Zd ZdZf Zedd� �Zedd� �Zedd� �Zedd � �Z d
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'1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa'
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r� | j|� Y nX dS )a Turn a netmask/hostmask string into a prefix length
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�__str__I s z_BaseAddress.__str__c C s t tt| j���S )N)�hash�hexrk r) )rW r r r
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rQ O s z _BaseAddress._get_address_keyc C s | j | jffS )N)rp r) )rW r r r
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�__init___ s z_BaseNetwork.__init__c C s d| j jt| �f S )Nz%s(%r))rp r r! )rW r r r
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r} e s z_BaseNetwork.__str__c c s< t | j�}t | j�}x"t|d |�D ]}| j|�V q$W dS )z�Generate Iterator over usable hosts in a network.
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rw � s z_BaseNetwork.__eq__c C s t t| j�t| j�A �S )N)r~ rk rK r� )rW r r r
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� __contains__� s
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z_BaseNetwork.overlapsc C s< | j jd�}|d kr8| jt| j�t| j�B �}|| j d< |S )NrD )r� r@ r� rk rK �hostmask)rW r� r r r
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z _BaseNetwork.broadcast_addressc C s8 | j jd�}|d kr4| jt| j�| jA �}|| j d< |S )Nr� )r� r@ r� rk r� r: )rW r� r r r
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� with_netmask� s z_BaseNetwork.with_netmaskc C s d| j | jf S )Nz%s/%s)rK r� )rW r r r
�
with_hostmask� s z_BaseNetwork.with_hostmaskc C s t | j�t | j� d S )z&Number of hosts in the current subnet.r& )rk rD rK )rW r r r
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num_addresses� s z_BaseNetwork.num_addressesc C s dt | �f }t|��d S )Nz%%200s has no associated address class)r\ r] )rW r^ r r r
r� � s z_BaseNetwork._address_classc C s | j S )N)rI )rW r r r
rb � s z_BaseNetwork.prefixlenc c sD | j |j ks td| |f ��t|t�s2td| ��|j| jkoH|j| jksZtd|| f ��|| krfdS |jd|j|jf �}| j � \}}x�||ko�||k�r|j|jkr�|j|jkr�|V |j � \}}q�|j|jkr�|j|jkr�|V |j � \}}q�t
d|||f ��q�W ||k�r |V n$||k�r.|V nt
d|||f ��dS )a� Remove an address from a larger block.
For example:
addr1 = ip_network('192.0.2.0/28')
addr2 = ip_network('192.0.2.1/32')
list(addr1.address_exclude(addr2)) =
[IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'),
IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')]
or IPv6:
addr1 = ip_network('2001:db8::1/32')
addr2 = ip_network('2001:db8::1/128')
list(addr1.address_exclude(addr2)) =
[ip_network('2001:db8::1/128'),
ip_network('2001:db8::2/127'),
ip_network('2001:db8::4/126'),
ip_network('2001:db8::8/125'),
...
ip_network('2001:db8:8000::/33')]
Args:
other: An IPv4Network or IPv6Network object of the same type.
Returns:
An iterator of the IPv(4|6)Network objects which is self
minus other.
Raises:
TypeError: If self and other are of differing address
versions, or if other is not a network object.
ValueError: If other is not completely contained by self.
z%%s and %s are not of the same versionz%s is not a network objectz%s not contained in %sNz%s/%sz3Error performing exclusion: s1: %s s2: %s other: %s) rH r7 r5 rO rK rD r rp rb rE �AssertionError)rW rv �s1�s2r r r
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z _BaseNetwork.address_excludec C s` | j |j kr td| |f ��| j|jk r,dS | j|jkr<dS | j|jk rLdS | j|jkr\dS dS )a� Compare two IP objects.
This is only concerned about the comparison of the integer
representation of the network addresses. This means that the
host bits aren't considered at all in this method. If you want
to compare host bits, you can easily enough do a
'HostA._ip < HostB._ip'
Args:
other: An IP object.
Returns:
If the IP versions of self and other are the same, returns:
-1 if self < other:
eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25')
IPv6Network('2001:db8::1000/124') <
IPv6Network('2001:db8::2000/124')
0 if self == other
eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24')
IPv6Network('2001:db8::1000/124') ==
IPv6Network('2001:db8::1000/124')
1 if self > other
eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25')
IPv6Network('2001:db8::2000/124') >
IPv6Network('2001:db8::1000/124')
Raises:
TypeError if the IP versions are different.
z"%s and %s are not of the same typer& r rG rG )rH r7 rK r� )rW rv r r r
�compare_networks. s ! z _BaseNetwork.compare_networksc C s | j | j| jfS )z�Network-only key function.
Returns an object that identifies this address' network and
netmask. This function is a suitable "key" argument for sorted()
and list.sort().
)rH rK r� )rW r r r
rP ^ s z _BaseNetwork._get_networks_keyr& Nc c s� | j | jkr| V dS |dk rJ|| j k r0td��|dkr@td��|| j }|dk rZtd��| j | }|| jkr~td|| f ��t| j�}t| j�d }t| j�d |? }x(t|||�D ]}| j||f�}|V q�W dS )a� The subnets which join to make the current subnet.
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(self._prefixlen == 32 for IPv4 or self._prefixlen == 128
for IPv6), yield an iterator with just ourself.
Args:
prefixlen_diff: An integer, the amount the prefix length
should be increased by. This should not be set if
new_prefix is also set.
new_prefix: The desired new prefix length. This must be a
larger number (smaller prefix) than the existing prefix.
This should not be set if prefixlen_diff is also set.
Returns:
An iterator of IPv(4|6) objects.
Raises:
ValueError: The prefixlen_diff is too small or too large.
OR
prefixlen_diff and new_prefix are both set or new_prefix
is a smaller number than the current prefix (smaller
number means a larger network)
Nznew prefix must be longerr& z(cannot set prefixlen_diff and new_prefixr z prefix length diff must be > 0z0prefix length diff %d is invalid for netblock %s) rI r9 r rk rK rD r� r� rp ) rW �prefixlen_diff�
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Args:
prefixlen_diff: An integer, the amount the prefix length of
the network should be decreased by. For example, given a
/24 network and a prefixlen_diff of 3, a supernet with a
/21 netmask is returned.
Returns:
An IPv4 network object.
Raises:
ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have
a negative prefix length.
OR
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larger number than the current prefix (larger number means a
smaller network)
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)rK � is_multicastrD )rW r r r
r� � s z_BaseNetwork.is_multicastc C s | j jo| jjS )z�Test if the address is otherwise IETF reserved.
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)rK � is_reservedrD )rW r r r
r� � s z_BaseNetwork.is_reservedc C s | j jo| jjS )z�Test if the address is reserved for link-local.
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)rK �
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r� � s z_BaseNetwork.is_link_localc C s | j jo| jjS )z�Test if this address is allocated for private networks.
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iana-ipv4-special-registry or iana-ipv6-special-registry.
)rK �
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r� � s z_BaseNetwork.is_privatec C s | j S )z�Test if this address is allocated for public networks.
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)r� )rW r r r
� is_global� s z_BaseNetwork.is_globalc C s | j jo| jjS )z�Test if the address is unspecified.
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)rK �is_unspecifiedrD )rW r r r
r� s z_BaseNetwork.is_unspecifiedc C s | j jo| jjS )z�Test if the address is a loopback address.
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)rK � is_loopbackrD )rW r r r
r� s z_BaseNetwork.is_loopback)r& N)r& N)$r r r r r� r{ r} r� r� r� rx rw r� r� r� rs rD r� r� r� r� r� r� rb r� r� rP rE r? r� r� r� r� r� r� r� r r r r
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The following methods are used by IPv4 objects in both single IP
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r r r& �
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rV 0 s z$_BaseV4._explode_shorthand_ip_stringc C sn || j krdt|t�r|}n.y| j|�}W n tk
rF | j|�}Y nX t| j|��}||f| j |< | j | S )a Make a (netmask, prefix_len) tuple from the given argument.
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)�_netmask_cacher5 rk rl r ro r rc )ra �argrb r� r r r
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r� dS X d| ko�| jkS S )z�Verify that the netmask is valid.
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r� Nr& z
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Args:
address: A string or integer representing the IP
Additionally, an integer can be passed, so
IPv4Address('192.0.2.1') == IPv4Address(3221225985).
or, more generally
IPv4Address(int(IPv4Address('192.0.2.1'))) ==
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Raises:
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Nr r r zUnexpected '/' in %r)
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r� s zIPv4Address.is_reservedc s4 t � fdd�� jjD ��o2t� fdd�� jjD ��S )a� ``True`` if the address is defined as not globally reachable by
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(for IPv6) with the following exceptions:
* ``is_private`` is ``False`` for ``100.64.0.0/10``
* For IPv4-mapped IPv6-addresses the ``is_private`` value is determined by the
semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_private == address.ipv4_mapped.is_private
``is_private`` has value opposite to :attr:`is_global`, except for the ``100.64.0.0/10``
IPv4 range where they are both ``False``.
c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
� <genexpr>( s z)IPv4Address.is_private.<locals>.<genexpr>c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
r� ) s )�anyr� �_private_networks�all� _private_networks_exceptions)rW r )rW r
r� s zIPv4Address.is_privatec C s | | j jko| j S )ar ``True`` if the address is defined as globally reachable by
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(for IPv6) with the following exception:
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semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_global == address.ipv4_mapped.is_global
``is_global`` has value opposite to :attr:`is_private`, except for the ``100.64.0.0/10``
IPv4 range where they are both ``False``.
)r� �_public_networkr� )rW r r r
r� , s zIPv4Address.is_globalc C s | | j jkS )z�Test if the address is reserved for multicast use.
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r� > s zIPv4Address.is_multicastc C s | | j jkS )z�Test if the address is unspecified.
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r� I s zIPv4Address.is_unspecifiedc C s | | j jkS )z�Test if the address is a loopback address.
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r� T s zIPv4Address.is_loopbackc C s | | j jkS )z�Test if the address is reserved for link-local.
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)r� �_linklocal_network)rW r r r
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dS ) r ae This class represents and manipulates 32-bit IPv4 network + addresses..
Attributes: [examples for IPv4Network('192.0.2.0/27')]
.network_address: IPv4Address('192.0.2.0')
.hostmask: IPv4Address('0.0.0.31')
.broadcast_address: IPv4Address('192.0.2.32')
.netmask: IPv4Address('255.255.255.224')
.prefixlen: 27
Tc C s� t j| |� t|ttf�r&|}| j}n^t|t�rT|d }t|�dkrL|d n| j}n0t|�}| j |d �}t|�dkr~|d n| j}t
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�@ �| _ | j| jd kr�| j| _dS )a Instantiate a new IPv4 network object.
Args:
address: A string or integer representing the IP [& network].
'192.0.2.0/24'
'192.0.2.0/255.255.255.0'
'192.0.0.2/0.0.0.255'
are all functionally the same in IPv4. Similarly,
'192.0.2.1'
'192.0.2.1/255.255.255.255'
'192.0.2.1/32'
are also functionally equivalent. That is to say, failing to
provide a subnetmask will create an object with a mask of /32.
If the mask (portion after the / in the argument) is given in
dotted quad form, it is treated as a netmask if it starts with a
non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it
starts with a zero field (e.g. 0.255.255.255 == /8), with the
single exception of an all-zero mask which is treated as a
netmask == /0. If no mask is given, a default of /32 is used.
Additionally, an integer can be passed, so
IPv4Network('192.0.2.1') == IPv4Network(3221225985)
or, more generally
IPv4Interface(int(IPv4Interface('192.0.2.1'))) ==
IPv4Interface('192.0.2.1')
Raises:
AddressValueError: If ipaddress isn't a valid IPv4 address.
NetmaskValueError: If the netmask isn't valid for
an IPv4 address.
ValueError: If strict is True and a network address is not
supplied.
r r& r z%s has host bits setN)rO r� r5 rk r� r9 r� r# r% rm r rK r� r� rI r r� r� )rW r r r$ r� �argsr� r r r
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100.64.0.0/10z 0.0.0.0/8z
10.0.0.0/8z
172.16.0.0/12z 192.0.0.0/24z192.0.0.170/31z 192.0.2.0/24z192.168.0.0/16z
198.18.0.0/15z198.51.100.0/24z203.0.113.0/24z 240.0.0.0/4z255.255.255.255/32z 192.0.0.9/32z
192.0.0.10/32z0.0.0.0N)
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addresses and networks.
r4 r r& rd Z0123456789ABCDEFabcdefc C sJ || j kr@t|t�r|}n
| j|�}t| j|��}||f| j |< | j | S )a Make a (netmask, prefix_len) tuple from the given argument.
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zAddress cannot be empty�:r� z At least %d parts expected in %rr� r& z%s in %rNz%xr i�� z!At most %d colons permitted in %rz At most one '::' permitted in %rr z0Leading ':' only permitted as part of '::' in %rz1Trailing ':' only permitted as part of '::' in %rz/Expected at most %d other parts with '::' in %rz,Exactly %d parts expected without '::' in %rrG rG rG ) r r" r# r r> r) rA �
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z Only hex digits permitted in %rr z$At most 4 characters permitted in %rr )� _HEX_DIGITSrj r r# rk )ra Z
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the IPv6 address.
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r& r r� � rG rG rG rG )r� r# ) ra �hextetsZbest_doublecolon_startZbest_doublecolon_lenZdoublecolon_startZdoublecolon_len�indexZhextetZbest_doublecolon_endr r r
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z_BaseV6._compress_hextetsNc sZ |dkrt | j�}|| jkr$td��d| � � fdd�tddd�D �}| j|�}d j|�S )
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NzIPv6 address is too largez%032xc s& g | ] }d t � ||d � d� �qS )z%xr r )rk )r� r� )�hex_strr r
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z_BaseV6._string_from_ip_intc s� t | t�rt| j�}n t | t�r,t| j�}nt| �}| j|�}d| � � fdd�tddd�D �}t | ttf�r�ddj |�| j
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z%032xc s g | ]}� ||d � �qS )r r )r� r� )r� r r
r� K s z8_BaseV6._explode_shorthand_ip_string.<locals>.<listcomp>r r r z%s/%dr� ) r5 r r! rK r r. rm r� rO r� rI )rW rn re r� r )r� r
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z$_BaseV6._explode_shorthand_ip_stringc C s& | j ddd� jdd�}dj|�d S )z�Return the reverse DNS pointer name for the IPv6 address.
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Nr& r� r� r� z .ip6.arparG )rX �replacer� )rW Z
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z/Represent and manipulate single IPv6 Addresses.r) r� c C sr t |t�r | j|� || _dS t |t�rF| j|d� tj|d�| _dS t|�}d|krbtd| ��| j |�| _dS )a Instantiate a new IPv6 address object.
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address: A string or integer representing the IP
Additionally, an integer can be passed, so
IPv6Address('2001:db8::') ==
IPv6Address(42540766411282592856903984951653826560)
or, more generally
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Nr r r zUnexpected '/' in %r)
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* For IPv4-mapped IPv6-addresses the ``is_private`` value is determined by the
semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_private == address.ipv4_mapped.is_private
``is_private`` has value opposite to :attr:`is_global`, except for the ``100.64.0.0/10``
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Nc 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
r� � s z)IPv6Address.is_private.<locals>.<genexpr>c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
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semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_global == address.ipv4_mapped.is_global
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r� � s zIPv6Address.is_loopbackc C s | j d? dkrdS t| j d@ �S )z�Return the IPv4 mapped address.
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r i�� Nl �� )r) r )rW r r r
r� � s zIPv6Address.ipv4_mappedc C s4 | j d? dkrdS t| j d? d@ �t| j d@ �fS )z�Tuple of embedded teredo IPs.
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zIPv6Address.teredoc C s$ | j d? dkrdS t| j d? d@ �S )z�Return the IPv4 6to4 embedded address.
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�p i N�P l �� )r) r )rW r r r
� sixtofour s zIPv6Address.sixtofourN)r) r� )r r r r rr r� rs r� r� r� r� r� r� r� r� r� r� r� r� r� r� r r r r
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r� m s zIPv6Interface.with_netmaskc C s d| j | j�| jf S )Nz%s/%s)r| r) r� )rW r r r
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r� w s z IPv6Interface.is_unspecifiedc C s | j dko| jjS )Nr& )r) r� r� )rW r r r
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r ) s r c @ s2 e Zd ZdZeZd
dd�Zdd� Zedd� �Z d S ) r av This class represents and manipulates 128-bit IPv6 networks.
Attributes: [examples for IPv6('2001:db8::1000/124')]
.network_address: IPv6Address('2001:db8::1000')
.hostmask: IPv6Address('::f')
.broadcast_address: IPv6Address('2001:db8::100f')
.netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0')
.prefixlen: 124
Tc C s� t j| |� t|ttf�r&|}| j}n^t|t�rT|d }t|�dkrL|d n| j}n0t|�}| j |d �}t|�dkr~|d n| j}t
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�@ �| _ | j| jd kr�| j| _dS )a� Instantiate a new IPv6 Network object.
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IP and prefix/netmask.
'2001:db8::/128'
'2001:db8:0000:0000:0000:0000:0000:0000/128'
'2001:db8::'
are all functionally the same in IPv6. That is to say,
failing to provide a subnetmask will create an object with
a mask of /128.
Additionally, an integer can be passed, so
IPv6Network('2001:db8::') ==
IPv6Network(42540766411282592856903984951653826560)
or, more generally
IPv6Network(int(IPv6Network('2001:db8::'))) ==
IPv6Network('2001:db8::')
strict: A boolean. If true, ensure that we have been passed
A true network address, eg, 2001:db8::1000/124 and not an
IP address on a network, eg, 2001:db8::1/124.
Raises:
AddressValueError: If address isn't a valid IPv6 address.
NetmaskValueError: If the netmask isn't valid for
an IPv6 address.
ValueError: If strict was True and a network address was not
supplied.
r r& r z%s has host bits setN)rO r� r5 rk r� r9 r� r# r% rm r
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zIPv6Network.__init__c c s@ t | j�}t | j�}x&t|d |d �D ]}| j|�V q(W dS )z�Generate Iterator over usable hosts in a network.
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zIPv6Network.hostsc C s | j jo| jjS )a` Test if the address is reserved for site-local.
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addresses as defined by RFC 4193.
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::ffff:0:0/96z64:ff9b:1::/48z100::/64z 2001::/23z
2001:db8::/32z 2002::/16zfc00::/7z
2001:1::1/128z
2001:1::2/128z 2001:3::/32z2001:4:112::/48z 2001:20::/28z 2001:30::/28z::/8z100::/8z200::/7z400::/6z800::/5z1000::/4z4000::/3z6000::/3z8000::/3zA000::/3zC000::/3zE000::/4zF000::/5zF800::/6zFE00::/9z fec0::/10N)
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�r,t||�}n t d!| ��|}|�rF|S t|||||�}|}||_|S |j� � Y nX dS )#a� Open file and return a stream. Raise OSError upon failure.
file is either a text or byte string giving the name (and the path
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wrapped. (If a file descriptor is given, it is closed when the
returned I/O object is closed, unless closefd is set to False.)
mode is an optional string that specifies the mode in which the file is
opened. It defaults to 'r' which means open for reading in text mode. Other
common values are 'w' for writing (truncating the file if it already
exists), 'x' for exclusive creation of a new file, and 'a' for appending
(which on some Unix systems, means that all writes append to the end of the
file regardless of the current seek position). In text mode, if encoding is
not specified the encoding used is platform dependent. (For reading and
writing raw bytes use binary mode and leave encoding unspecified.) The
available modes are:
========= ===============================================================
Character Meaning
--------- ---------------------------------------------------------------
'r' open for reading (default)
'w' open for writing, truncating the file first
'x' create a new file and open it for writing
'a' open for writing, appending to the end of the file if it exists
'b' binary mode
't' text mode (default)
'+' open a disk file for updating (reading and writing)
'U' universal newline mode (deprecated)
========= ===============================================================
The default mode is 'rt' (open for reading text). For binary random
access, the mode 'w+b' opens and truncates the file to 0 bytes, while
'r+b' opens the file without truncation. The 'x' mode implies 'w' and
raises an `FileExistsError` if the file already exists.
Python distinguishes between files opened in binary and text modes,
even when the underlying operating system doesn't. Files opened in
binary mode (appending 'b' to the mode argument) return contents as
bytes objects without any decoding. In text mode (the default, or when
't' is appended to the mode argument), the contents of the file are
returned as strings, the bytes having been first decoded using a
platform-dependent encoding or using the specified encoding if given.
'U' mode is deprecated and will raise an exception in future versions
of Python. It has no effect in Python 3. Use newline to control
universal newlines mode.
buffering is an optional integer used to set the buffering policy.
Pass 0 to switch buffering off (only allowed in binary mode), 1 to select
line buffering (only usable in text mode), and an integer > 1 to indicate
the size of a fixed-size chunk buffer. When no buffering argument is
given, the default buffering policy works as follows:
* Binary files are buffered in fixed-size chunks; the size of the buffer
is chosen using a heuristic trying to determine the underlying device's
"block size" and falling back on `io.DEFAULT_BUFFER_SIZE`.
On many systems, the buffer will typically be 4096 or 8192 bytes long.
* "Interactive" text files (files for which isatty() returns True)
use line buffering. Other text files use the policy described above
for binary files.
encoding is the str name of the encoding used to decode or encode the
file. This should only be used in text mode. The default encoding is
platform dependent, but any encoding supported by Python can be
passed. See the codecs module for the list of supported encodings.
errors is an optional string that specifies how encoding errors are to
be handled---this argument should not be used in binary mode. Pass
'strict' to raise a ValueError exception if there is an encoding error
(the default of None has the same effect), or pass 'ignore' to ignore
errors. (Note that ignoring encoding errors can lead to data loss.)
See the documentation for codecs.register for a list of the permitted
encoding error strings.
newline is a string controlling how universal newlines works (it only
applies to text mode). It can be None, '', '\n', '\r', and '\r\n'. It works
as follows:
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enabled. Lines in the input can end in '\n', '\r', or '\r\n', and
these are translated into '\n' before being returned to the
caller. If it is '', universal newline mode is enabled, but line
endings are returned to the caller untranslated. If it has any of
the other legal values, input lines are only terminated by the given
string, and the line ending is returned to the caller untranslated.
* On output, if newline is None, any '\n' characters written are
translated to the system default line separator, os.linesep. If
newline is '', no translation takes place. If newline is any of the
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the given string.
closedfd is a bool. If closefd is False, the underlying file descriptor will
be kept open when the file is closed. This does not work when a file name is
given and must be True in that case.
The newly created file is non-inheritable.
A custom opener can be used by passing a callable as *opener*. The
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*opener* with (*file*, *flags*). *opener* must return an open file
descriptor (passing os.open as *opener* results in functionality similar to
passing None).
open() returns a file object whose type depends on the mode, and
through which the standard file operations such as reading and writing
are performed. When open() is used to open a file in a text mode ('w',
'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open
a file in a binary mode, the returned class varies: in read binary
mode, it returns a BufferedReader; in write binary and append binary
modes, it returns a BufferedWriter, and in read/write mode, it returns
a BufferedRandom.
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opened in a text mode, and for bytes a BytesIO can be used like a file
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is used.
c C sF |j � std��tj| |� |dkr,td��|| _| j� t� | _dS )zMCreate a new buffered reader using the given readable raw IO object.
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N)r� �_peek_unlocked)rD rm r? r? r@ rh s zBufferedReader.peekc C sr t || j�}t| j�| j }||k s,|dkrb| j| }| jj|�}|rb| j| jd � | | _d| _| j| jd � S )Nr )rk r� r! r� r� r; rq )rD rl ZwantZhaveZto_readZcurrentr? r? r@ r� ) s
z BufferedReader._peek_unlockedc C sT |dk rt d��|dkr dS | j�( | jd� | jt|t| j�| j ��S Q R X dS )z<Reads up to size bytes, with at most one read() system call.r z(number of bytes to read must be positiver� r
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zBufferedReader._readintoc C s t j| �t| j� | j S )N)r� rX r! r� r� )rD r? r? r@ rX t s zBufferedReader.tellc C sX |t krtd��| j�8 |dkr4|t| j�| j 8 }tj| ||�}| j� |S Q R X d S )Nzinvalid whence valuer
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dd� Z ddd�Z dS )r/ z�A buffer for a writeable sequential RawIO object.
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|��W Y d d }~X nX |S Q R X d S )Nzwrite to closed filez can't write str to binary stream)re r" r r r r� r! r� r� �_flush_unlocked�extend�BlockingIOError�errno�strerror)rD r Zbeforer� �eZoverager? r? r@ r} � s(
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zBufferedWriter.truncatec C s | j � | j� W d Q R X d S )N)r� r� )rD r? r? r@ r[ � s zBufferedWriter.flushc C s� | j rtd��xz| jr�y| jj| j�}W n tk
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d��| jd |�= qW d S )Nzflush of closed filezHself.raw should implement RawIOBase: it should not raise BlockingIOErrorz)write could not complete without blockingr z*write() returned incorrect number of bytes) re r" r� r; r} r� � RuntimeErrorr� ZEAGAINr! r, )rD rl r? r? r@ r� � s z BufferedWriter._flush_unlockedc C s t j| �t| j� S )N)r� rX r! r� )rD r? r? r@ rX � s zBufferedWriter.tellr c C s8 |t krtd��| j� | j� tj| ||�S Q R X d S )Nzinvalid whence value)r� r" r� r� r� rU )rD rV rW r? r? r@ rU � s
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dd� Zdd� Zdd� Zed d � �ZdS ) �BufferedRWPaira� A buffered reader and writer object together.
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used with a socket or two-way pipe.
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writeable respectively. If the buffer_size is omitted it defaults to
DEFAULT_BUFFER_SIZE.
c C s< |j � std��|j� s td��t||�| _t||�| _dS )zEConstructor.
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z#"reader" argument must be readable.z#"writer" argument must be writable.N)ra r, rc r0 �readerr/ �writer)rD r� r� r� r? r? r@ r� � s zBufferedRWPair.__init__Nc C s |d kr d}| j j|�S )Nr
r )r� rq )rD rm r? r? r@ rq � s zBufferedRWPair.readc C s | j j|�S )N)r� r� )rD r r? r? r@ r� � s zBufferedRWPair.readintoc C s | j j|�S )N)r� r} )rD r r? r? r@ r} s zBufferedRWPair.writer c C s | j j|�S )N)r� rh )rD rm r? r? r@ rh s zBufferedRWPair.peekc C s | j j|�S )N)r� r� )rD rm r? r? r@ r� s zBufferedRWPair.read1c C s | j j|�S )N)r� r� )rD r r? r? r@ r�
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dd� Zd S ) r. z�A buffered interface to random access streams.
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d��|S )Nzinvalid whence valuer
r z seek() returned invalid position) r� r" r[ r� r� r; rU r� r! r� r, )rD rV rW r? r? r@ rU 2 s $zBufferedRandom.seekc C s | j rtj| �S tj| �S d S )N)r� r/ rX r0 )rD r? r? r@ rX C s
zBufferedRandom.tellNc C s |d kr| j � }tj| |�S )N)rX r/ rY )rD rV r? r? r@ rY I s zBufferedRandom.truncatec C s |d kr d}| j � tj| |�S )Nr
r )r[ r0 rq )rD rm r? r? r@ rq O s zBufferedRandom.readc C s | j � tj| |�S )N)r[ r0 r� )rD r r? r? r@ r� U s zBufferedRandom.readintoc C s | j � tj| |�S )N)r[ r0 rh )rD rm r? r? r@ rh Y s zBufferedRandom.peekc C s | j � tj| |�S )N)r[ r0 r� )rD rm r? r? r@ r� ] s zBufferedRandom.read1c C s | j � tj| |�S )N)r[ r0 r� )rD r r? r? r@ r� a s zBufferedRandom.readinto1c C sF | j r:| j�( | jj| jt| j � d� | j� W d Q R X tj| |�S )Nr
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zBufferedRandom.write)r )N)N)r )rH rI rJ rC r( r� rU rX rY rq r� rh r� r� r} r? r? r? r@ r. $ s
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|tjO }|ttdd�O }ttdd��p�ttdd�}||O }d}�y|dk �r<|�s�td��|dk�r�tj||d�}n0|||�}t|t��std��|dk �r&td��|}|�s<tj|d� || _tj |�} y(t j | j ��rrt t!j"tj#t!j"�|��W n t$k
�r� Y nX t| dd�| _%| j%dk�r�t&| _%t'�r�t'|tj(� || _)| j�r�tj*|dt+� W n" |dk �r�tj|� � Y nX || _ dS ) ad Open a file. The mode can be 'r' (default), 'w', 'x' or 'a' for reading,
writing, exclusive creation or appending. The file will be created if it
doesn't exist when opened for writing or appending; it will be truncated
when opened for writing. A FileExistsError will be raised if it already
exists when opened for creating. Opening a file for creating implies
writing so this mode behaves in a similar way to 'w'. Add a '+' to the mode
to allow simultaneous reading and writing. A custom opener can be used by
passing a callable as *opener*. The underlying file descriptor for the file
object is then obtained by calling opener with (*name*, *flags*).
*opener* must return an open file descriptor (passing os.open as *opener*
results in functionality similar to passing None).
r Nr
z$integer argument expected, got floatznegative file descriptorzinvalid mode: %szxrwab+c s s | ]}|d kV qdS )ZrwaxNr? )�.0�cr? r? r@ � <genexpr>� s z"FileIO.__init__.<locals>.<genexpr>r zKMust have exactly one of create/read/write/append mode and at most one plusr Tr r r �O_BINARYZ O_NOINHERIT� O_CLOEXECz'Cannot use closefd=False with file namei� z expected integer from openerzNegative file descriptorFr+ r r ),�_fd�_closefdr r3 r �floatr r r" r r �sum�count�_created� _writable�O_EXCL�O_CREAT� _readable�O_TRUNC�
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zFileIO.__init__c C sD | j dkr@| jr@| j r@dd l}|jd| f td| d� | j� d S )Nr zunclosed file %rr )�
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zFileIO.__del__c C s t d| jj��d S )Nz cannot serialize '%s' object)r rR rH )rD r? r? r@ r� � s zFileIO.__getstate__c
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zFileIO.__repr__c C s | j std��d S )NzFile not open for reading)r� rP )rD r? r? r@ rb s zFileIO._checkReadablec C s | j std��d S )NzFile not open for writing)r� rP )rD r_ r? r? r@ rd s zFileIO._checkWritablec C sP | j � | j� |dks |dk r(| j� S ytj| j|�S tk
rJ dS X dS )z�Read at most size bytes, returned as bytes.
Only makes one system call, so less data may be returned than requested
In non-blocking mode, returns None if no data is available.
Return an empty bytes object at EOF.
Nr )rZ rb r� r rq r� r� )rD rm r? r? r@ rq s z FileIO.readc C s� | j � | j� t}y6tj| jdt�}tj| j�j}||krH|| d }W n t k
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r� |r�P dS X |s�P ||7 }qhW t|�S )z�Read all data from the file, returned as bytes.
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or None if no data is available. Return an empty bytes object at EOF.
r r
N)rZ rb r( r r� r� r r) �st_sizer, rp r! r� rq r� r )rD �bufsizerV �endr< rl r� r? r? r@ r� s4 zFileIO.readallc C s4 t |�jd�}| jt|��}t|�}||d|�< |S )z Same as RawIOBase.readinto().r� N)r� r� rq r! )rD r �mr� rl r? r? r@ r� ? s
zFileIO.readintoc C s8 | j � | j� ytj| j|�S tk
r2 dS X dS )a Write bytes b to file, return number written.
Only makes one system call, so not all of the data may be written.
The number of bytes actually written is returned. In non-blocking mode,
returns None if the write would block.
N)rZ rd r r} r� r� )rD r r? r? r@ r} G s z FileIO.writec C s* t |t�rtd��| j� tj| j||�S )a� Move to new file position.
Argument offset is a byte count. Optional argument whence defaults to
SEEK_SET or 0 (offset from start of file, offset should be >= 0); other values
are SEEK_CUR or 1 (move relative to current position, positive or negative),
and SEEK_END or 2 (move relative to end of file, usually negative, although
many platforms allow seeking beyond the end of a file).
Note that not all file objects are seekable.
zan integer is required)r r� r rZ r r� r� )rD rV rW r? r? r@ rU U s
z FileIO.seekc C s | j � tj| jdt�S )zYtell() -> int. Current file position.
Can raise OSError for non seekable files.r )rZ r r� r� r )rD r? r? r@ rX e s z FileIO.tellc C s2 | j � | j� |dkr | j� }tj| j|� |S )z�Truncate the file to at most size bytes.
Size defaults to the current file position, as returned by tell().
The current file position is changed to the value of size.
N)rZ rd rX r � ftruncater� )rD rm r? r? r@ rY l s zFileIO.truncatec
s. | j s*z| jrtj| j� W dt� j� X dS )z�Close the file.
A closed file cannot be used for further I/O operations. close() may be
called more than once without error.
N)re r� r r3 r� r� )rD )rR r? r@ r3 y s
z FileIO.closec C sF | j � | jdkr@y | j� W n tk
r8 d| _Y nX d| _| jS )z$True if file supports random-access.NFT)rZ � _seekablerX r, )rD r? r? r@ r^ � s
zFileIO.seekablec C s | j � | jS )z'True if file was opened in a read mode.)rZ r� )rD r? r? r@ ra � s zFileIO.readablec C s | j � | jS )z(True if file was opened in a write mode.)rZ r� )rD r? r? r@ rc � s zFileIO.writablec C s | j � | jS )z3Return the underlying file descriptor (an integer).)rZ r� )rD r? r? r@ r* � s z
FileIO.filenoc C s | j � tj| j�S )z.True if the file is connected to a TTY device.)rZ r r' r� )rD r? r? r@ r' � s z
FileIO.isattyc C s | j S )z6True if the file descriptor will be closed by close().)r� )rD r? r? r@ r9 � s zFileIO.closefdc C sJ | j r| jrdS dS n0| jr,| jr&dS dS n| jrB| jr<dS dS ndS dS ) zString giving the file modezxb+Zxbzab+Zabzrb+�rb�wbN)r� r� r� r� )rD r? r? r@ r2 � s z FileIO.moder )r TN)N)N)N)"rH rI rJ r� r� r� r� r� r� r� r� r] r� r� rb rd rq r� r� r} r rU rX rY r3 r^ ra rc r* r' r r9 r2 r� r? r? )rR r@ r& n s8
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TextIOBasez�Base class for text I/O.
This class provides a character and line based interface to stream
I/O. There is no readinto method because Python's character strings
are immutable. There is no public constructor.
r
c C s | j d� dS )z�Read at most size characters from stream, where size is an int.
Read from underlying buffer until we have size characters or we hit EOF.
If size is negative or omitted, read until EOF.
Returns a string.
rq N)rT )rD rm r? r? r@ rq � s zTextIOBase.readc C s | j d� dS )z.Write string s to stream and returning an int.r} N)rT )rD �sr? r? r@ r} � s zTextIOBase.writeNc C s | j d� dS )z*Truncate size to pos, where pos is an int.rY N)rT )rD rV r? r? r@ rY � s zTextIOBase.truncatec C s | j d� dS )z_Read until newline or EOF.
Returns an empty string if EOF is hit immediately.
rt N)rT )rD r? r? r@ rt � s zTextIOBase.readlinec C s | j d� dS )z�
Separate the underlying buffer from the TextIOBase and return it.
After the underlying buffer has been detached, the TextIO is in an
unusable state.
r� N)rT )rD r? r? r@ r� � s zTextIOBase.detachc C s dS )zSubclasses should override.Nr? )rD r? r? r@ r6 � s zTextIOBase.encodingc C s dS )z�Line endings translated so far.
Only line endings translated during reading are considered.
Subclasses should override.
Nr? )rD r? r? r@ �newlines� s zTextIOBase.newlinesc C s dS )zMError setting of the decoder or encoder.
Subclasses should override.Nr? )rD r? r? r@ r7 � s zTextIOBase.errorsr )r )N)
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� Zd"d d�Zd d � Zed kr�e� dS )#a� Helper class to quickly write a loop over all standard input files.
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import fileinput
for line in fileinput.input():
process(line)
This iterates over the lines of all files listed in sys.argv[1:],
defaulting to sys.stdin if the list is empty. If a filename is '-' it
is also replaced by sys.stdin. To specify an alternative list of
filenames, pass it as the argument to input(). A single file name is
also allowed.
Functions filename(), lineno() return the filename and cumulative line
number of the line that has just been read; filelineno() returns its
line number in the current file; isfirstline() returns true iff the
line just read is the first line of its file; isstdin() returns true
iff the line was read from sys.stdin. Function nextfile() closes the
current file so that the next iteration will read the first line from
the next file (if any); lines not read from the file will not count
towards the cumulative line count; the filename is not changed until
after the first line of the next file has been read. Function close()
closes the sequence.
Before any lines have been read, filename() returns None and both line
numbers are zero; nextfile() has no effect. After all lines have been
read, filename() and the line number functions return the values
pertaining to the last line read; nextfile() has no effect.
All files are opened in text mode by default, you can override this by
setting the mode parameter to input() or FileInput.__init__().
If an I/O error occurs during opening or reading a file, the OSError
exception is raised.
If sys.stdin is used more than once, the second and further use will
return no lines, except perhaps for interactive use, or if it has been
explicitly reset (e.g. using sys.stdin.seek(0)).
Empty files are opened and immediately closed; the only time their
presence in the list of filenames is noticeable at all is when the
last file opened is empty.
It is possible that the last line of a file doesn't end in a newline
character; otherwise lines are returned including the trailing
newline.
Class FileInput is the implementation; its methods filename(),
lineno(), fileline(), isfirstline(), isstdin(), nextfile() and close()
correspond to the functions in the module. In addition it has a
readline() method which returns the next input line, and a
__getitem__() method which implements the sequence behavior. The
sequence must be accessed in strictly sequential order; sequence
access and readline() cannot be mixed.
Optional in-place filtering: if the keyword argument inplace=1 is
passed to input() or to the FileInput constructor, the file is moved
to a backup file and standard output is directed to the input file.
This makes it possible to write a filter that rewrites its input file
in place. If the keyword argument backup=".<some extension>" is also
given, it specifies the extension for the backup file, and the backup
file remains around; by default, the extension is ".bak" and it is
deleted when the output file is closed. In-place filtering is
disabled when standard input is read. XXX The current implementation
does not work for MS-DOS 8+3 filesystems.
XXX Possible additions:
- optional getopt argument processing
- isatty()
- read(), read(size), even readlines()
� N�input�close�nextfile�filename�lineno�
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not count towards the cumulative line count. The filename is not
changed until after the first line of the next file has been read.
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Return the file number of the current file. When no file is currently
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Returns true the line just read is the first line of its file,
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Returns true if the last line was read from sys.stdin,
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zno active input())r r r
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filename(), lineno(), fileline(), isfirstline(), isstdin(), fileno(),
nextfile() and close() correspond to the functions of the same name
in the module.
In addition it has a readline() method which returns the next
input line, and a __getitem__() method which implements the
sequence behavior. The sequence must be accessed in strictly
sequential order; random access and readline() cannot be mixed.
NFr r r c C s� t |t�r|f}n(|d kr(tjdd � }|s2d}nt|�}|| _|| _|| _|rhdd l}|j dt
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Module difflib -- helpers for computing deltas between objects.
Function get_close_matches(word, possibilities, n=3, cutoff=0.6):
Use SequenceMatcher to return list of the best "good enough" matches.
Function context_diff(a, b):
For two lists of strings, return a delta in context diff format.
Function ndiff(a, b):
Return a delta: the difference between `a` and `b` (lists of strings).
Function restore(delta, which):
Return one of the two sequences that generated an ndiff delta.
Function unified_diff(a, b):
For two lists of strings, return a delta in unified diff format.
Class SequenceMatcher:
A flexible class for comparing pairs of sequences of any type.
Class Differ:
For producing human-readable deltas from sequences of lines of text.
Class HtmlDiff:
For producing HTML side by side comparison with change highlights.
�get_close_matches�ndiff�restore�SequenceMatcher�Differ�IS_CHARACTER_JUNK� IS_LINE_JUNK� context_diff� unified_diff�
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SequenceMatcher is a flexible class for comparing pairs of sequences of
any type, so long as the sequence elements are hashable. The basic
algorithm predates, and is a little fancier than, an algorithm
published in the late 1980's by Ratcliff and Obershelp under the
hyperbolic name "gestalt pattern matching". The basic idea is to find
the longest contiguous matching subsequence that contains no "junk"
elements (R-O doesn't address junk). The same idea is then applied
recursively to the pieces of the sequences to the left and to the right
of the matching subsequence. This does not yield minimal edit
sequences, but does tend to yield matches that "look right" to people.
SequenceMatcher tries to compute a "human-friendly diff" between two
sequences. Unlike e.g. UNIX(tm) diff, the fundamental notion is the
longest *contiguous* & junk-free matching subsequence. That's what
catches peoples' eyes. The Windows(tm) windiff has another interesting
notion, pairing up elements that appear uniquely in each sequence.
That, and the method here, appear to yield more intuitive difference
reports than does diff. This method appears to be the least vulnerable
to synching up on blocks of "junk lines", though (like blank lines in
ordinary text files, or maybe "<P>" lines in HTML files). That may be
because this is the only method of the 3 that has a *concept* of
"junk" <wink>.
Example, comparing two strings, and considering blanks to be "junk":
>>> s = SequenceMatcher(lambda x: x == " ",
... "private Thread currentThread;",
... "private volatile Thread currentThread;")
>>>
.ratio() returns a float in [0, 1], measuring the "similarity" of the
sequences. As a rule of thumb, a .ratio() value over 0.6 means the
sequences are close matches:
>>> print(round(s.ratio(), 3))
0.866
>>>
If you're only interested in where the sequences match,
.get_matching_blocks() is handy:
>>> for block in s.get_matching_blocks():
... print("a[%d] and b[%d] match for %d elements" % block)
a[0] and b[0] match for 8 elements
a[8] and b[17] match for 21 elements
a[29] and b[38] match for 0 elements
Note that the last tuple returned by .get_matching_blocks() is always a
dummy, (len(a), len(b), 0), and this is the only case in which the last
tuple element (number of elements matched) is 0.
If you want to know how to change the first sequence into the second,
use .get_opcodes():
>>> for opcode in s.get_opcodes():
... print("%6s a[%d:%d] b[%d:%d]" % opcode)
equal a[0:8] b[0:8]
insert a[8:8] b[8:17]
equal a[8:29] b[17:38]
See the Differ class for a fancy human-friendly file differencer, which
uses SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
See also function get_close_matches() in this module, which shows how
simple code building on SequenceMatcher can be used to do useful work.
Timing: Basic R-O is cubic time worst case and quadratic time expected
case. SequenceMatcher is quadratic time for the worst case and has
expected-case behavior dependent in a complicated way on how many
elements the sequences have in common; best case time is linear.
Methods:
__init__(isjunk=None, a='', b='')
Construct a SequenceMatcher.
set_seqs(a, b)
Set the two sequences to be compared.
set_seq1(a)
Set the first sequence to be compared.
set_seq2(b)
Set the second sequence to be compared.
find_longest_match(alo, ahi, blo, bhi)
Find longest matching block in a[alo:ahi] and b[blo:bhi].
get_matching_blocks()
Return list of triples describing matching subsequences.
get_opcodes()
Return list of 5-tuples describing how to turn a into b.
ratio()
Return a measure of the sequences' similarity (float in [0,1]).
quick_ratio()
Return an upper bound on .ratio() relatively quickly.
real_quick_ratio()
Return an upper bound on ratio() very quickly.
N� Tc C s( || _ d | _| _|| _| j||� dS )a! Construct a SequenceMatcher.
Optional arg isjunk is None (the default), or a one-argument
function that takes a sequence element and returns true iff the
element is junk. None is equivalent to passing "lambda x: 0", i.e.
no elements are considered to be junk. For example, pass
lambda x: x in " \t"
if you're comparing lines as sequences of characters, and don't
want to synch up on blanks or hard tabs.
Optional arg a is the first of two sequences to be compared. By
default, an empty string. The elements of a must be hashable. See
also .set_seqs() and .set_seq1().
Optional arg b is the second of two sequences to be compared. By
default, an empty string. The elements of b must be hashable. See
also .set_seqs() and .set_seq2().
Optional arg autojunk should be set to False to disable the
"automatic junk heuristic" that treats popular elements as junk
(see module documentation for more information).
N)�isjunk�a�b�autojunk�set_seqs)�selfr r r r r r r �__init__� s ; zSequenceMatcher.__init__c C s | j |� | j|� dS )z�Set the two sequences to be compared.
>>> s = SequenceMatcher()
>>> s.set_seqs("abcd", "bcde")
>>> s.ratio()
0.75
N)�set_seq1�set_seq2)r r r r r r r � s
zSequenceMatcher.set_seqsc C s$ || j krdS || _ d | _| _dS )aM Set the first sequence to be compared.
The second sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq1("bcde")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq2().
N)r �matching_blocks�opcodes)r r r r r r � s
zSequenceMatcher.set_seq1c C s2 || j krdS || _ d | _| _d| _| j� dS )aM Set the second sequence to be compared.
The first sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq2("abcd")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq1().
N)r r r �
fullbcount�_SequenceMatcher__chain_b)r r r r r r � s
zSequenceMatcher.set_seq2c C s� | j }i | _}x*t|�D ] \}}|j|g �}|j|� qW t� | _}| j}|r�x"|j� D ]}||�r\|j |� q\W x|D ]
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setdefault�append�set�bjunkr �keys�addZbpopular�lenr �items) r r r& �i�elt�indicesZjunkr Zpopular�nZntestZidxsr r r Z __chain_b) s,
zSequenceMatcher.__chain_bc C sN | j | j| j| jjf\}}}}||d } }
} i } g }
x�t||�D ]�}| j}i }xn|j|| |
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} qbW |} qBW xb| |k�r*|
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| �S )a� Find longest matching block in a[alo:ahi] and b[blo:bhi].
If isjunk is not defined:
Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
alo <= i <= i+k <= ahi
blo <= j <= j+k <= bhi
and for all (i',j',k') meeting those conditions,
k >= k'
i <= i'
and if i == i', j <= j'
In other words, of all maximal matching blocks, return one that
starts earliest in a, and of all those maximal matching blocks that
start earliest in a, return the one that starts earliest in b.
>>> s = SequenceMatcher(None, " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=0, b=4, size=5)
If isjunk is defined, first the longest matching block is
determined as above, but with the additional restriction that no
junk element appears in the block. Then that block is extended as
far as possible by matching (only) junk elements on both sides. So
the resulting block never matches on junk except as identical junk
happens to be adjacent to an "interesting" match.
Here's the same example as before, but considering blanks to be
junk. That prevents " abcd" from matching the " abcd" at the tail
end of the second sequence directly. Instead only the "abcd" can
match, and matches the leftmost "abcd" in the second sequence:
>>> s = SequenceMatcher(lambda x: x==" ", " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=1, b=0, size=4)
If no blocks match, return (alo, blo, 0).
>>> s = SequenceMatcher(None, "ab", "c")
>>> s.find_longest_match(0, 2, 0, 1)
Match(a=0, b=0, size=0)
r
r% )r r r& r+ � __contains__�range�getr )r �alo�ahi�blo�bhir r r& ZisbjunkZbestiZbestjZbestsizeZj2lenZnothingr0 Zj2lengetZnewj2len�j�kr r r �find_longest_matchP sB 8 $ " z"SequenceMatcher.find_longest_matchc C s� | j dk r| j S t| j�t| j� }}d|d|fg}g }x�|r�|j� \}}}}| j||||� \} }
} } | r:|j| � || k r�||
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||f� |j||df� tt t
j |��| _ | j S )a Return list of triples describing matching subsequences.
Each triple is of the form (i, j, n), and means that
a[i:i+n] == b[j:j+n]. The triples are monotonically increasing in
i and in j. New in Python 2.5, it's also guaranteed that if
(i, j, n) and (i', j', n') are adjacent triples in the list, and
the second is not the last triple in the list, then i+n != i' or
j+n != j'. IOW, adjacent triples never describe adjacent equal
blocks.
The last triple is a dummy, (len(a), len(b), 0), and is the only
triple with n==0.
>>> s = SequenceMatcher(None, "abxcd", "abcd")
>>> list(s.get_matching_blocks())
[Match(a=0, b=0, size=2), Match(a=3, b=2, size=2), Match(a=5, b=4, size=0)]
Nr
) r r. r r �popr= r) �sort�list�mapr �_make)r �la�lbZqueuer r7 r8 r9 r: r0 r; r< �x�i1�j1Zk1Z non_adjacent�i2�j2Zk2r r r �get_matching_blocks� s8
z#SequenceMatcher.get_matching_blocksc C s� | j dk r| j S d }}g | _ }x�| j� D ]�\}}}d}||k rP||k rPd}n||k r^d}n ||k rjd}|r�|j|||||f� || || }}|r,|jd||||f� q,W |S )a[ Return list of 5-tuples describing how to turn a into b.
Each tuple is of the form (tag, i1, i2, j1, j2). The first tuple
has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
tuple preceding it, and likewise for j1 == the previous j2.
The tags are strings, with these meanings:
'replace': a[i1:i2] should be replaced by b[j1:j2]
'delete': a[i1:i2] should be deleted.
Note that j1==j2 in this case.
'insert': b[j1:j2] should be inserted at a[i1:i1].
Note that i1==i2 in this case.
'equal': a[i1:i2] == b[j1:j2]
>>> a = "qabxcd"
>>> b = "abycdf"
>>> s = SequenceMatcher(None, a, b)
>>> for tag, i1, i2, j1, j2 in s.get_opcodes():
... print(("%7s a[%d:%d] (%s) b[%d:%d] (%s)" %
... (tag, i1, i2, a[i1:i2], j1, j2, b[j1:j2])))
delete a[0:1] (q) b[0:0] ()
equal a[1:3] (ab) b[0:2] (ab)
replace a[3:4] (x) b[2:3] (y)
equal a[4:6] (cd) b[3:5] (cd)
insert a[6:6] () b[5:6] (f)
Nr
r �replace�delete�insert�equal)r rJ r) )r r0 r; Zanswer�ai�bj�size�tagr r r � get_opcodes s$
zSequenceMatcher.get_opcodes� c
c sr | j � }|sdg}|d d dkrZ|d \}}}}}|t||| �|t||| �|f|d< |d d dkr�|d \}}}}}||t||| �|t||| �f|d< || }g } x�|D ]�\}}}}}|dko�|| |k�r(| j||t||| �|t||| �f� | V g } t||| �t||| � }}| j|||||f� q�W | �rnt| �dk�ob| d d dk �rn| V dS ) a� Isolate change clusters by eliminating ranges with no changes.
Return a generator of groups with up to n lines of context.
Each group is in the same format as returned by get_opcodes().
>>> from pprint import pprint
>>> a = list(map(str, range(1,40)))
>>> b = a[:]
>>> b[8:8] = ['i'] # Make an insertion
>>> b[20] += 'x' # Make a replacement
>>> b[23:28] = [] # Make a deletion
>>> b[30] += 'y' # Make another replacement
>>> pprint(list(SequenceMatcher(None,a,b).get_grouped_opcodes()))
[[('equal', 5, 8, 5, 8), ('insert', 8, 8, 8, 9), ('equal', 8, 11, 9, 12)],
[('equal', 16, 19, 17, 20),
('replace', 19, 20, 20, 21),
('equal', 20, 22, 21, 23),
('delete', 22, 27, 23, 23),
('equal', 27, 30, 23, 26)],
[('equal', 31, 34, 27, 30),
('replace', 34, 35, 30, 31),
('equal', 35, 38, 31, 34)]]
rN r
r% N)rN r
r% r
r% ���rU rU )rS �max�minr) r. )
r r3 ZcodesrR rF rH rG rI Znn�groupr r r �get_grouped_opcodes< s( &&( (z#SequenceMatcher.get_grouped_opcodesc C s0 t dd� | j� D ��}t|t| j�t| j� �S )a� Return a measure of the sequences' similarity (float in [0,1]).
Where T is the total number of elements in both sequences, and
M is the number of matches, this is 2.0*M / T.
Note that this is 1 if the sequences are identical, and 0 if
they have nothing in common.
.ratio() is expensive to compute if you haven't already computed
.get_matching_blocks() or .get_opcodes(), in which case you may
want to try .quick_ratio() or .real_quick_ratio() first to get an
upper bound.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.quick_ratio()
0.75
>>> s.real_quick_ratio()
1.0
c s s | ]}|d V qdS )r% NrU r )�.0Ztripler r r � <genexpr>� s z(SequenceMatcher.ratio.<locals>.<genexpr>)�sumrJ r r. r r )r r r r r �ration s zSequenceMatcher.ratioc C s� | j dkr8i | _ }x"| jD ]}|j|d�d ||< q W | j }i }|jd }}xH| jD ]>}||�rl|| }n |j|d�}|d ||< |dkrV|d }qVW t|t| j�t| j� �S )z�Return an upper bound on ratio() relatively quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute.
Nr
r% )r! r r6 r4 r r r. )r r! r1 ZavailZavailhasr Znumbr r r � quick_ratio� s
zSequenceMatcher.quick_ratioc C s* t | j�t | j� }}tt||�|| �S )z�Return an upper bound on ratio() very quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute than either .ratio() or .quick_ratio().
)r. r r r rW )r rC rD r r r �real_quick_ratio� s z SequenceMatcher.real_quick_ratio)Nr r T)rT )�__name__�
__module__� __qualname__�__doc__r r r r r" r= rJ rS rY r] r^ r_ r r r r r + s j
@ ,'nG7
2 rT �333333�?c C s� |dkst d|f ��d| ko(dkn s<t d|f ��g }t� }|j| � xL|D ]D}|j|� |j� |krV|j� |krV|j� |krV|j|j� |f� qVW t||�}dd� |D �S )a� Use SequenceMatcher to return list of the best "good enough" matches.
word is a sequence for which close matches are desired (typically a
string).
possibilities is a list of sequences against which to match word
(typically a list of strings).
Optional arg n (default 3) is the maximum number of close matches to
return. n must be > 0.
Optional arg cutoff (default 0.6) is a float in [0, 1]. Possibilities
that don't score at least that similar to word are ignored.
The best (no more than n) matches among the possibilities are returned
in a list, sorted by similarity score, most similar first.
>>> get_close_matches("appel", ["ape", "apple", "peach", "puppy"])
['apple', 'ape']
>>> import keyword as _keyword
>>> get_close_matches("wheel", _keyword.kwlist)
['while']
>>> get_close_matches("Apple", _keyword.kwlist)
[]
>>> get_close_matches("accept", _keyword.kwlist)
['except']
r
zn must be > 0: %rg g �?z cutoff must be in [0.0, 1.0]: %rc S s g | ] \}}|�qS r r )rZ ZscorerE r r r �
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ValueErrorr r r r_ r^ r] r) � _nlargest)ZwordZ
possibilitiesr3 �cutoff�result�srE r r r r � s
c C s4 dt | � }}x ||k r.| | |kr.|d7 }qW |S )z}
Return number of `ch` characters at the start of `line`.
Example:
>>> _count_leading(' abc', ' ')
3
r
r% )r. )�line�chr0 r3 r r r �_count_leading� s
rm c @ sJ e Zd ZdZddd�Zdd� Zdd� Zd d
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dS )r a�
Differ is a class for comparing sequences of lines of text, and
producing human-readable differences or deltas. Differ uses
SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
Each line of a Differ delta begins with a two-letter code:
'- ' line unique to sequence 1
'+ ' line unique to sequence 2
' ' line common to both sequences
'? ' line not present in either input sequence
Lines beginning with '? ' attempt to guide the eye to intraline
differences, and were not present in either input sequence. These lines
can be confusing if the sequences contain tab characters.
Note that Differ makes no claim to produce a *minimal* diff. To the
contrary, minimal diffs are often counter-intuitive, because they synch
up anywhere possible, sometimes accidental matches 100 pages apart.
Restricting synch points to contiguous matches preserves some notion of
locality, at the occasional cost of producing a longer diff.
Example: Comparing two texts.
First we set up the texts, sequences of individual single-line strings
ending with newlines (such sequences can also be obtained from the
`readlines()` method of file-like objects):
>>> text1 = ''' 1. Beautiful is better than ugly.
... 2. Explicit is better than implicit.
... 3. Simple is better than complex.
... 4. Complex is better than complicated.
... '''.splitlines(keepends=True)
>>> len(text1)
4
>>> text1[0][-1]
'\n'
>>> text2 = ''' 1. Beautiful is better than ugly.
... 3. Simple is better than complex.
... 4. Complicated is better than complex.
... 5. Flat is better than nested.
... '''.splitlines(keepends=True)
Next we instantiate a Differ object:
>>> d = Differ()
Note that when instantiating a Differ object we may pass functions to
filter out line and character 'junk'. See Differ.__init__ for details.
Finally, we compare the two:
>>> result = list(d.compare(text1, text2))
'result' is a list of strings, so let's pretty-print it:
>>> from pprint import pprint as _pprint
>>> _pprint(result)
[' 1. Beautiful is better than ugly.\n',
'- 2. Explicit is better than implicit.\n',
'- 3. Simple is better than complex.\n',
'+ 3. Simple is better than complex.\n',
'? ++\n',
'- 4. Complex is better than complicated.\n',
'? ^ ---- ^\n',
'+ 4. Complicated is better than complex.\n',
'? ++++ ^ ^\n',
'+ 5. Flat is better than nested.\n']
As a single multi-line string it looks like this:
>>> print(''.join(result), end="")
1. Beautiful is better than ugly.
- 2. Explicit is better than implicit.
- 3. Simple is better than complex.
+ 3. Simple is better than complex.
? ++
- 4. Complex is better than complicated.
? ^ ---- ^
+ 4. Complicated is better than complex.
? ++++ ^ ^
+ 5. Flat is better than nested.
Methods:
__init__(linejunk=None, charjunk=None)
Construct a text differencer, with optional filters.
compare(a, b)
Compare two sequences of lines; generate the resulting delta.
Nc C s || _ || _dS )a�
Construct a text differencer, with optional filters.
The two optional keyword parameters are for filter functions:
- `linejunk`: A function that should accept a single string argument,
and return true iff the string is junk. The module-level function
`IS_LINE_JUNK` may be used to filter out lines without visible
characters, except for at most one splat ('#'). It is recommended
to leave linejunk None; the underlying SequenceMatcher class has
an adaptive notion of "noise" lines that's better than any static
definition the author has ever been able to craft.
- `charjunk`: A function that should accept a string of length 1. The
module-level function `IS_CHARACTER_JUNK` may be used to filter out
whitespace characters (a blank or tab; **note**: bad idea to include
newline in this!). Use of IS_CHARACTER_JUNK is recommended.
N)�linejunk�charjunk)r rn ro r r r r M s zDiffer.__init__c
c s� t | j||�}x�|j� D ]�\}}}}}|dkrD| j||||||�} n\|dkr^| jd|||�} nB|dkrx| jd|||�} n(|dkr�| jd|||�} ntd|f ��| E d H qW d S )
a�
Compare two sequences of lines; generate the resulting delta.
Each sequence must contain individual single-line strings ending with
newlines. Such sequences can be obtained from the `readlines()` method
of file-like objects. The delta generated also consists of newline-
terminated strings, ready to be printed as-is via the writeline()
method of a file-like object.
Example:
>>> print(''.join(Differ().compare('one\ntwo\nthree\n'.splitlines(True),
... 'ore\ntree\nemu\n'.splitlines(True))),
... end="")
- one
? ^
+ ore
? ^
- two
- three
? -
+ tree
+ emu
rK rL �-rM �+rN � zunknown tag %rN)r rn rS �_fancy_replace�_dumprf )
r r r �cruncherrR r7 r8 r9 r: �gr r r �compared s zDiffer.comparec c s* x$t ||�D ]}d||| f V q W dS )z4Generate comparison results for a same-tagged range.z%s %sN)r5 )r rR rE �lo�hir0 r r r rt � s z Differ._dumpc
c s� ||k r||k st �|| || k rF| jd|||�}| jd|||�}n | jd|||�}| jd|||�}x||fD ]} | E d H qpW d S )Nrq rp )�AssertionErrorrt )
r r r7 r8 r r9 r: �first�secondrv r r r �_plain_replace� s zDiffer._plain_replacec c sH d\}}t | j�} d\}
} x�t||�D ]�} || }
| j|
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} qH| j|� | j� |krH| j� |krH| j� |krH| j� || }}}qHW q&W ||k � r�|
dkr�| j||||||�E dH dS |
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| j ||||||�E dH || || }}|
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||� x�| j � D ]�\}}}}}|| || }} |dk�r�|d| 7 }|d| 7 }nb|dk�r�|d | 7 }nJ|d
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| 7 }|d
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d| V | j ||d |||d |�E dH dS )aL
When replacing one block of lines with another, search the blocks
for *similar* lines; the best-matching pair (if any) is used as a
synch point, and intraline difference marking is done on the
similar pair. Lots of work, but often worth it.
Example:
>>> d = Differ()
>>> results = d._fancy_replace(['abcDefghiJkl\n'], 0, 1,
... ['abcdefGhijkl\n'], 0, 1)
>>> print(''.join(results), end="")
- abcDefghiJkl
? ^ ^ ^
+ abcdefGhijkl
? ^ ^ ^
�G�z��?� �?Ng �?r rK �^rL rp rM rq rN rr zunknown tag %rz r% )r~ r )NN)r ro r5 r r r_ r^ r] r} �
_fancy_helperr rS rf �_qformat) r r r7 r8 r r9 r: Z
best_ratiorh ru ZeqiZeqjr; rP r0 rO Zbest_iZbest_jZaeltZbelt�atags�btagsrR Zai1Zai2Zbj1Zbj2rC rD r r r rs � sX
zDiffer._fancy_replacec c sb g }||k r<||k r*| j ||||||�}qT| jd|||�}n||k rT| jd|||�}|E d H d S )Nrp rq )rs rt )r r r7 r8 r r9 r: rv r r r r� � s zDiffer._fancy_helperc c s� t t|d�t|d��}t |t|d|� d��}t |t|d|� d��}||d� j� }||d� j� }d| V |r�dd| |f V d| V |r�dd| |f V dS )a�
Format "?" output and deal with leading tabs.
Example:
>>> d = Differ()
>>> results = d._qformat('\tabcDefghiJkl\n', '\tabcdefGhijkl\n',
... ' ^ ^ ^ ', ' ^ ^ ^ ')
>>> for line in results: print(repr(line))
...
'- \tabcDefghiJkl\n'
'? \t ^ ^ ^\n'
'+ \tabcdefGhijkl\n'
'? \t ^ ^ ^\n'
� Nrr z- z? %s%s
z+ )rW rm �rstrip)r ZalineZbliner� r� �commonr r r r�
s
zDiffer._qformat)NN) r` ra rb rc r rw rt r} rs r� r� r r r r r � s \
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Return 1 for ignorable line: iff `line` is blank or contains a single '#'.
Examples:
>>> IS_LINE_JUNK('\n')
True
>>> IS_LINE_JUNK(' # \n')
True
>>> IS_LINE_JUNK('hello\n')
False
Nr )rk Zpatr r r r > s � c C s | |kS )z�
Return 1 for ignorable character: iff `ch` is a space or tab.
Examples:
>>> IS_CHARACTER_JUNK(' ')
True
>>> IS_CHARACTER_JUNK('\t')
True
>>> IS_CHARACTER_JUNK('\n')
False
>>> IS_CHARACTER_JUNK('x')
False
r )rl Zwsr r r r N s c C s: | d }|| }|dkr"dj |�S |s.|d8 }dj ||�S )z Convert range to the "ed" formatr% z{}z{},{})�format)�start�stop� beginningr r r r �_format_range_unifiede s
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c c sh t | ||||||� d}�xHtd| |�j|�D �]0} |s�d}|rJdj|�nd}
|r\dj|�nd} dj||
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j|||�V x�| D ]�\}}}}}|dk�rx | ||� D ]}d| V q�W q�|dk�r2x | ||� D ]}d| V �q W |dkr�x |||� D ]}d| V �qHW q�W q.W dS )a�
Compare two sequences of lines; generate the delta as a unified diff.
Unified diffs are a compact way of showing line changes and a few
lines of context. The number of context lines is set by 'n' which
defaults to three.
By default, the diff control lines (those with ---, +++, or @@) are
created with a trailing newline. This is helpful so that inputs
created from file.readlines() result in diffs that are suitable for
file.writelines() since both the inputs and outputs have trailing
newlines.
For inputs that do not have trailing newlines, set the lineterm
argument to "" so that the output will be uniformly newline free.
The unidiff format normally has a header for filenames and modification
times. Any or all of these may be specified using strings for
'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
The modification times are normally expressed in the ISO 8601 format.
Example:
>>> for line in unified_diff('one two three four'.split(),
... 'zero one tree four'.split(), 'Original', 'Current',
... '2005-01-26 23:30:50', '2010-04-02 10:20:52',
... lineterm=''):
... print(line) # doctest: +NORMALIZE_WHITESPACE
--- Original 2005-01-26 23:30:50
+++ Current 2010-04-02 10:20:52
@@ -1,4 +1,4 @@
+zero
one
-two
-three
+tree
four
FNTz {}r z
--- {}{}{}z
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r% � rT � z@@ -{} +{} @@{}rN rr rK rL rp rM rq rU > rK rL > rM rK )� _check_typesr rY r� r� )r r �fromfile�tofile� fromfiledate�
tofiledater3 �lineterm�startedrX �fromdate�todater{ �last� file1_range� file2_rangerR rF rH rG rI rk r r r r p s0 )
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Compare two sequences of lines; generate the delta as a context diff.
Context diffs are a compact way of showing line changes and a few
lines of context. The number of context lines is set by 'n' which
defaults to three.
By default, the diff control lines (those with *** or ---) are
created with a trailing newline. This is helpful so that inputs
created from file.readlines() result in diffs that are suitable for
file.writelines() since both the inputs and outputs have trailing
newlines.
For inputs that do not have trailing newlines, set the lineterm
argument to "" so that the output will be uniformly newline free.
The context diff format normally has a header for filenames and
modification times. Any or all of these may be specified using
strings for 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
The modification times are normally expressed in the ISO 8601 format.
If not specified, the strings default to blanks.
Example:
>>> print(''.join(context_diff('one\ntwo\nthree\nfour\n'.splitlines(True),
... 'zero\none\ntree\nfour\n'.splitlines(True), 'Original', 'Current')),
... end="")
*** Original
--- Current
***************
*** 1,4 ****
one
! two
! three
four
--- 1,4 ----
+ zero
one
! tree
four
z+ z- z! z )rM rL rK rN FNTz {}r z
*** {}{}{}z
--- {}{}{}r
r% z***************r� z
*** {} ****{}c s s | ]\}}}}}|dkV qdS )rK rL N> rK rL r )rZ rR �_r r r r[ s z context_diff.<locals>.<genexpr>rM rT r� z
--- {} ----{}c s s | ]\}}}}}|dkV qdS )rK rM N> rM rK r )rZ rR r� r r r r[ s rL rU )r� �dictr rY r� r� �any)r r r� r� r� r� r3 r� �prefixr� rX r� r� r{ r� r� rR rF rH r� rk r� rG rI r r r r � s4 ,
c G s� | r2t | d t� r2tdt| d �j| d f ��|rdt |d t� rdtdt|d �j|d f ��x$|D ] }t |t�sjtd|f ��qjW d S )Nr
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Compare `a` and `b`, two sequences of lines represented as bytes rather
than str. This is a wrapper for `dfunc`, which is typically either
unified_diff() or context_diff(). Inputs are losslessly converted to
strings so that `dfunc` only has to worry about strings, and encoded
back to bytes on return. This is necessary to compare files with
unknown or inconsistent encoding. All other inputs (except `n`) must be
bytes rather than str.
c S sP y | j dd�S tk
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Compare `a` and `b` (lists of strings); return a `Differ`-style delta.
Optional keyword parameters `linejunk` and `charjunk` are for filter
functions, or can be None:
- linejunk: A function that should accept a single string argument and
return true iff the string is junk. The default is None, and is
recommended; the underlying SequenceMatcher class has an adaptive
notion of "noise" lines.
- charjunk: A function that accepts a character (string of length
1), and returns true iff the character is junk. The default is
the module-level function IS_CHARACTER_JUNK, which filters out
whitespace characters (a blank or tab; note: it's a bad idea to
include newline in this!).
Tools/scripts/ndiff.py is a command-line front-end to this function.
Example:
>>> diff = ndiff('one\ntwo\nthree\n'.splitlines(keepends=True),
... 'ore\ntree\nemu\n'.splitlines(keepends=True))
>>> print(''.join(diff), end="")
- one
? ^
+ ore
? ^
- two
- three
? -
+ tree
+ emu
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a� Returns generator yielding marked up from/to side by side differences.
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tolines -- list of text lines to be compared to fromlines
context -- number of context lines to display on each side of difference,
if None, all from/to text lines will be generated.
linejunk -- passed on to ndiff (see ndiff documentation)
charjunk -- passed on to ndiff (see ndiff documentation)
This function returns an iterator which returns a tuple:
(from line tuple, to line tuple, boolean flag)
from/to line tuple -- (line num, line text)
line num -- integer or None (to indicate a context separation)
line text -- original line text with following markers inserted:
'\0+' -- marks start of added text
'\0-' -- marks start of deleted text
'\0^' -- marks start of changed text
'\1' -- marks end of added/deleted/changed text
boolean flag -- None indicates context separation, True indicates
either "from" or "to" line contains a change, otherwise False.
This function/iterator was originally developed to generate side by side
file difference for making HTML pages (see HtmlDiff class for example
usage).
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side difference markup. Optional ndiff arguments may be passed to this
function and they in turn will be passed to ndiff.
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the entire line.
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the entire line.
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intraline markup (indices obtained from second line)
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side -- indice into the num_lines list (0=from,1=to)
num_lines -- from/to current line number. This is NOT intended to be a
passed parameter. It is present as a keyword argument to
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it yields both a "from" and a "to" line, otherwise it will yield one
or the other. In addition to yielding the lines of from/to text, a
boolean flag is yielded to indicate if the text line(s) have
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rR dS X |dk rj|j||f� |dk r|j||f� qW |jd�\}}|jd�\}}|||p�|fV qW dS )at Yields from/to lines of text with a change indication.
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iterator. Its difference from that iterator is that this function
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indication). If necessary it will collect single from/to lines
until it has a matching pair from/to pair to yield.
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=%(charset)s" />
<title></title>
<style type="text/css">%(styles)s
</style>
</head>
<body>
%(table)s%(legend)s
</body>
</html>aH
table.diff {font-family:Courier; border:medium;}
.diff_header {background-color:#e0e0e0}
td.diff_header {text-align:right}
.diff_next {background-color:#c0c0c0}
.diff_add {background-color:#aaffaa}
.diff_chg {background-color:#ffff77}
.diff_sub {background-color:#ffaaaa}aZ
<table class="diff" id="difflib_chg_%(prefix)s_top"
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<colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
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<table class="diff" summary="Legends">
<tr> <th colspan="2"> Legends </th> </tr>
<tr> <td> <table border="" summary="Colors">
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<tr><td class="diff_add"> Added </td></tr>
<tr><td class="diff_chg">Changed</td> </tr>
<tr><td class="diff_sub">Deleted</td> </tr>
</table></td>
<td> <table border="" summary="Links">
<tr><th colspan="2"> Links </th> </tr>
<tr><td>(f)irst change</td> </tr>
<tr><td>(n)ext change</td> </tr>
<tr><td>(t)op</td> </tr>
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be generated in either full or contextual difference mode.
The following methods are provided for HTML generation:
make_table -- generates HTML for a single side by side table
make_file -- generates complete HTML file with a single side by side table
See tools/scripts/diff.py for an example usage of this class.
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context -- set to True for contextual differences (defaults to False
which shows full differences).
numlines -- number of context lines. When context is set True,
controls number of lines displayed before and after the change.
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which shows full differences).
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prefixes.
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... 'ore\ntree\nemu\n'.splitlines(keepends=True))
>>> diff = list(diff)
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one
two
three
>>> print(''.join(restore(diff, 2)), end="")
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Public functions: Internaldate2tuple
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host - host's name (default: localhost);
port - port number (default: standard IMAP4 port).
All IMAP4rev1 commands are supported by methods of the same
name (in lower-case).
All arguments to commands are converted to strings, except for
AUTHENTICATE, and the last argument to APPEND which is passed as
an IMAP4 literal. If necessary (the string contains any
non-printing characters or white-space and isn't enclosed with
either parentheses or double quotes) each string is quoted.
However, the 'password' argument to the LOGIN command is always
quoted. If you want to avoid having an argument string quoted
(eg: the 'flags' argument to STORE) then enclose the string in
parentheses (eg: "(\Deleted)").
Each command returns a tuple: (type, [data, ...]) where 'type'
is usually 'OK' or 'NO', and 'data' is either the text from the
tagged response, or untagged results from command. Each 'data'
is either a string, or a tuple. If a tuple, then the first part
is the header of the response, and the second part contains
the data (ie: 'literal' value).
Errors raise the exception class <instance>.error("<reason>").
IMAP4 server errors raise <instance>.abort("<reason>"),
which is a sub-class of 'error'. Mailbox status changes
from READ-WRITE to READ-ONLY raise the exception class
<instance>.readonly("<reason>"), which is a sub-class of 'abort'.
"error" exceptions imply a program error.
"abort" exceptions imply the connection should be reset, and
the command re-tried.
"readonly" exceptions imply the command should be re-tried.
Note: to use this module, you must read the RFCs pertaining to the
IMAP4 protocol, as the semantics of the arguments to each IMAP4
command are left to the invoker, not to mention the results. Also,
most IMAP servers implement a sub-set of the commands available here.
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)r� )rR r< r< r= r} Q s z IMAP4.socketc C sB d}| j ddg|�\}}|d r(||fS | j� \}}| j |||�S )a Return most recent 'RECENT' responses if any exist,
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ZRECENTrc Nrb ���)�_untagged_response�noop)rR �name�typ�datr< r< r= �recent] s z IMAP4.recentc C s | j |dg|j� �S )z�Return data for response 'code' if received, or None.
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'mechanism' specifies which authentication mechanism is to
be used - it must appear in <instance>.capabilities in the
form AUTH=<mechanism>.
'authobject' must be a callable object:
data = authobject(response)
It will be called to process server continuation responses; the
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r )r� )rR r< r< r= �check� s z IMAP4.checkc C s$ z| j d�\}}W dd| _X ||fS )z�Close currently selected mailbox.
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r Nr )r� rD )rR r� r� r< r< r= r� � s z IMAP4.closec C s | j d||�S )z�Copy 'message_set' messages onto end of 'new_mailbox'.
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IMAP4.copyc C s | j d|�S )zPCreate new mailbox.
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r )r� )rR r� r< r< r= �create� s z IMAP4.createc C s | j d|�S )zPDelete old mailbox.
(typ, [data]) = <instance>.delete(mailbox)
r )r� )rR r� r< r< r= �delete� s z IMAP4.deletec C s | j d||�S )z�Delete the ACLs (remove any rights) set for who on mailbox.
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r )r� )rR r� �whor< r< r= � deleteacl� s zIMAP4.deleteaclc C sH d| j krtjd��| jd|�\}}|dkr@d|j� kr@| j� ||fS )zkSend an RFC5161 enable string to the server.
(typ, [data]) = <intance>.enable(capability)
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IMAP4.expungec C s$ d}| j |||�\}}| j|||�S )a# Fetch (parts of) messages.
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r ZACL)r� r� )rR r� r� r� r< r< r= �getacl s z IMAP4.getaclc C s" | j d|||�\}}| j||d�S )za(typ, [data]) = <instance>.getannotation(mailbox, entry, attribute)
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getannotation# s zIMAP4.getannotationc C s | j d|�\}}| j||d�S )z�Get the quota root's resource usage and limits.
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r! �QUOTA)r� r� )rR �rootr� r� r< r< r= �getquota+ s zIMAP4.getquotac C s@ | j d|�\}}| j||d�\}}| j||d�\}}|||gfS )z�Get the list of quota roots for the named mailbox.
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r" r� Z QUOTAROOT)r� r� )rR r� r� r� ZquotaZ quotarootr< r< r= � getquotaroot6 s zIMAP4.getquotaroot�""�*c C s$ d}| j |||�\}}| j|||�S )z�List mailbox names in directory matching pattern.
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z IMAP4.loginc C s || | _ | _| jd| j�S )zr Force use of CRAM-MD5 authentication.
(typ, [data]) = <instance>.login_cram_md5(user, password)
zCRAM-MD5)r� r� r� �_CRAM_MD5_AUTH)rR r� r� r< r< r= �login_cram_md5[ s zIMAP4.login_cram_md5c C sB ddl }t| jt�r | jjd�n| j}| jd |j||d�j� S )z1 Authobject to use with CRAM-MD5 authentication. r Nzutf-8� Zmd5)�hmac�
isinstancer� �str�encoder� ZHMACZ hexdigest)rR Z challenger� �pwdr< r< r= r� d s zIMAP4._CRAM_MD5_AUTHc C sj d| _ y| jd�\}}W n( ddtj� dd� g }}Y nX | j� d| jkrbd| jd fS ||fS )z|Shutdown connection to server.
(typ, [data]) = <instance>.logout()
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r# )r� r� )rR r� r� r� r< r< r= �myrights� s zIMAP4.myrightsc C s d}| j |�\}}| j|||�S )zb Returns IMAP namespaces ala rfc2342
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r' )r� r� )rR r� r� r� r< r< r= � namespace� s zIMAP4.namespacec C s | j dkr| j| j� | jd�S )zFSend NOOP command.
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oldmailboxZ
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g�fS ) at Select a mailbox.
Flush all untagged responses.
(typ, [data]) = <instance>.select(mailbox='INBOX', readonly=False)
'data' is count of messages in mailbox ('EXISTS' response).
Mandated responses are ('FLAGS', 'EXISTS', 'RECENT', 'UIDVALIDITY'), so
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r r- rc r r z READ-ONLYrb z%s is not writable�EXISTSN)rG rI r� rD rC r� r@ �get)rR r� r@ r� r� r� r< r< r= �select� s
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r. )r� )rR r� r� Zwhatr< r< r= �setacl� s z IMAP4.setaclc G s | j d|�� \}}| j||d�S )z_(typ, [data]) = <instance>.setannotation(mailbox[, entry, attribute]+)
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setannotation� s zIMAP4.setannotationc C s | j d||�\}}| j||d�S )ziSet the quota root's resource limits.
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r0 r� )r� r� )rR r� Zlimitsr� r� r< r< r= �setquota s zIMAP4.setquotac G sF d}|d |d fdkr d| }| j |||f|�� \}}| j|||�S ) z�IMAP4rev1 extension SORT command.
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Nr2 zSSL support missingz TLS session already establishedzTLS not supported by serverrc )�server_hostnamer Tz Couldn't establish TLS session)�HAVE_SSLr> rK r? ro �ssl�_create_stdlib_contextr� � wrap_socketr� rS r� r� rn r� )rR � ssl_contextr� r� r� r< r< r= �starttls s$
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r6 )r� r� )rR Zthreading_algorithmr� r� r� r� r� r< r< r= �threadT s z IMAP4.threadc G s� |j � }|tkr | jd| ��| jt| krL| jd|| jdjt| �f ��d}| j||f|�� \}}|d krt|}nd}| j|||�S )
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r� } z| jd||f ��W Y d d }~X nX |dkr�| j � |dkr�| jd|||f ��||fS )Nr zcommand: %s => %sr� z%s command error: %s %s)r� �_get_tagged_responser? r> )rR r� r r� r� r r< r< r= �_command_complete� s "$zIMAP4._command_completec C sJ | j � \}}|d gkr | jd��t|d | j�}|j� }t|j� �| _d S )Nz"no CAPABILITY response from serverrb r� )r� r> r� rX r� �tuple�splitro )rR r� r� r< r< r= rn s
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z#socket error: unterminated line: %rr� r� z< %r���)r� r? �endswithrC rk r )rR r� r< r< r= r { s
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keyfile - PEM formatted file that contains your private key (default: None);
certfile - PEM formatted certificate chain file (default: None);
ssl_context - a SSLContext object that contains your certificate chain
and private key (default: None)
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certfile should not be set otherwise ValueError is raised.
for more documentation see the docstring of the parent class IMAP4.
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Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved.
Copyright (c) 2002-2006 Python Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Generate Plist example:
pl = dict(
aString = "Doodah",
aList = ["A", "B", 12, 32.1, [1, 2, 3]],
aFloat = 0.1,
anInt = 728,
aDict = dict(
anotherString = "<hello & hi there!>",
aUnicodeValue = "M\xe4ssig, Ma\xdf",
aTrueValue = True,
aFalseValue = False,
),
someData = b"<binary gunk>",
someMoreData = b"<lots of binary gunk>" * 10,
aDate = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())),
)
with open(fileName, 'wb') as fp:
dump(pl, fp)
Parse Plist example:
with open(fileName, 'rb') as fp:
pl = load(fp)
print(pl["aKey"])
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'abcd'
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Traceback (most recent call last):
...
ValueError: no string quotes around b''
>>> read_stringnl(io.BytesIO(b"\n"), stripquotes=False)
''
>>> read_stringnl(io.BytesIO(b"''\n"))
''
>>> read_stringnl(io.BytesIO(b'"abcd"'))
Traceback (most recent call last):
...
ValueError: no newline found when trying to read stringnl
Embedded escapes are undone in the result.
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'a\n\\b\x00c\td'
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'Queue Empty'
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>>> read_string4(io.BytesIO(b"\x00\x00\x00\x00abc"))
''
>>> read_string4(io.BytesIO(b"\x03\x00\x00\x00abcdef"))
'abc'
>>> read_string4(io.BytesIO(b"\x00\x00\x00\x03abcdef"))
Traceback (most recent call last):
...
ValueError: expected 50331648 bytes in a string4, but only 6 remain
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>>> import io
>>> read_bytes4(io.BytesIO(b"\x00\x00\x00\x00abc"))
b''
>>> read_bytes4(io.BytesIO(b"\x03\x00\x00\x00abcdef"))
b'abc'
>>> read_bytes4(io.BytesIO(b"\x00\x00\x00\x03abcdef"))
Traceback (most recent call last):
...
ValueError: expected 50331648 bytes in a bytes4, but only 6 remain
z#bytes4 byte count > sys.maxsize: %dz1expected %d bytes in a bytes4, but only %d remainN)r$ �sys�maxsizer r r )r r r r r r � read_bytes4 s
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>>> import io, struct, sys
>>> read_bytes8(io.BytesIO(b"\x00\x00\x00\x00\x00\x00\x00\x00abc"))
b''
>>> read_bytes8(io.BytesIO(b"\x03\x00\x00\x00\x00\x00\x00\x00abcdef"))
b'abc'
>>> bigsize8 = struct.pack("<Q", sys.maxsize//3)
>>> read_bytes8(io.BytesIO(bigsize8 + b"abcdef")) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
ValueError: expected ... bytes in a bytes8, but only 6 remain
z#bytes8 byte count > sys.maxsize: %dz1expected %d bytes in a bytes8, but only %d remainN)r' rB rC r r r )r r r r r r � read_bytes83 s
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True
r) z4no newline found when trying to read unicodestringnlNr zraw-unicode-escaper- )r. r/ r �str)r r r r r �read_unicodestringnlU s
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>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc)]) # little-endian 1-byte length
>>> t = read_unicodestring1(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring1(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring1, but only 6 remain
zutf-8�
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>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc), 0, 0, 0]) # little-endian 4-byte length
>>> t = read_unicodestring4(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring4(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring4, but only 6 remain
z+unicodestring4 byte count > sys.maxsize: %dzutf-8rK z9expected %d bytes in a unicodestring4, but only %d remainN)r$ rB rC r r r rH )r r r r r r �read_unicodestring4� s
rN �unicodestring4aA A counted Unicode string.
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giving the number of bytes in the string, and the second
argument-- the UTF-8 encoding of the Unicode string --
contains that many bytes.
c C sX t | �}|tjkr td| ��| j|�}t|�|kr@t|dd�S td|t|�f ��dS )a�
>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc)]) + b'\0' * 7 # little-endian 8-byte length
>>> t = read_unicodestring8(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring8(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring8, but only 6 remain
z+unicodestring8 byte count > sys.maxsize: %dzutf-8rK z9expected %d bytes in a unicodestring8, but only %d remainN)r' rB rC r r r rH )r r r r r r �read_unicodestring8� s
rP �unicodestring8aB A counted Unicode string.
The first argument is an 8-byte little-endian signed int
giving the number of bytes in the string, and the second
argument-- the UTF-8 encoding of the Unicode string --
contains that many bytes.
c C s. t | ddd�}|dkrdS |dkr&dS t|�S )z�
>>> import io
>>> read_decimalnl_short(io.BytesIO(b"1234\n56"))
1234
>>> read_decimalnl_short(io.BytesIO(b"1234L\n56"))
Traceback (most recent call last):
...
ValueError: invalid literal for int() with base 10: b'1234L'
F)r3 r4 s 00s 01T)r6 �int)r �sr r r �read_decimalnl_short� s rT c C s2 t | ddd�}|dd� dkr*|dd� }t|�S )z�
>>> import io
>>> read_decimalnl_long(io.BytesIO(b"1234L\n56"))
1234
>>> read_decimalnl_long(io.BytesIO(b"123456789012345678901234L\n6"))
123456789012345678901234
F)r3 r4 r N� Lr- r- )r6 rR )r rS r r r �read_decimalnl_long� s rV �decimalnl_shorta� A newline-terminated decimal integer literal.
This never has a trailing 'L', and the integer fit
in a short Python int on the box where the pickle
was written -- but there's no guarantee it will fit
in a short Python int on the box where the pickle
is read.
�decimalnl_longz�A newline-terminated decimal integer literal.
This has a trailing 'L', and can represent integers
of any size.
c C s t | ddd�}t|�S )zO
>>> import io
>>> read_floatnl(io.BytesIO(b"-1.25\n6"))
-1.25
F)r3 r4 )r6 �float)r rS r r r � read_floatnl' s rZ �floatnla� A newline-terminated decimal floating literal.
In general this requires 17 significant digits for roundtrip
identity, and pickling then unpickling infinities, NaNs, and
minus zero doesn't work across boxes, or on some boxes even
on itself (e.g., Windows can't read the strings it produces
for infinities or NaNs).
c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io, struct
>>> raw = struct.pack(">d", -1.25)
>>> raw
b'\xbf\xf4\x00\x00\x00\x00\x00\x00'
>>> read_float8(io.BytesIO(raw + b"\n"))
-1.25
r& z>dr z(not enough data in stream to read float8N)r r r r )r r r r r � read_float8= s
r\ �float8a An 8-byte binary representation of a float, big-endian.
The format is unique to Python, and shared with the struct
module (format string '>d') "in theory" (the struct and pickle
implementations don't share the code -- they should). It's
strongly related to the IEEE-754 double format, and, in normal
cases, is in fact identical to the big-endian 754 double format.
On other boxes the dynamic range is limited to that of a 754
double, and "add a half and chop" rounding is used to reduce
the precision to 53 bits. However, even on a 754 box,
infinities, NaNs, and minus zero may not be handled correctly
(may not survive roundtrip pickling intact).
)� decode_longc C s. t | �}| j|�}t|�|kr&td��t|�S )a+
>>> import io
>>> read_long1(io.BytesIO(b"\x00"))
0
>>> read_long1(io.BytesIO(b"\x02\xff\x00"))
255
>>> read_long1(io.BytesIO(b"\x02\xff\x7f"))
32767
>>> read_long1(io.BytesIO(b"\x02\x00\xff"))
-256
>>> read_long1(io.BytesIO(b"\x02\x00\x80"))
-32768
z'not enough data in stream to read long1)r r r r r^ )r r r r r r �
read_long1c s
r_ �long1a A binary long, little-endian, using 1-byte size.
This first reads one byte as an unsigned size, then reads that
many bytes and interprets them as a little-endian 2's-complement long.
If the size is 0, that's taken as a shortcut for the long 0L.
c C sB t | �}|dk r td| ��| j|�}t|�|kr:td��t|�S )ag
>>> import io
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\xff\x00"))
255
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\xff\x7f"))
32767
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\x00\xff"))
-256
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\x00\x80"))
-32768
>>> read_long1(io.BytesIO(b"\x00\x00\x00\x00"))
0
r zlong4 byte count < 0: %dz'not enough data in stream to read long4)r" r r r r^ )r r r r r r �
read_long4� s
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This first reads four bytes as a signed size (but requires the
size to be >= 0), then reads that many bytes and interprets them
as a little-endian 2's-complement long. If the size is 0, that's taken
as a shortcut for the int 0, although LONG1 should really be used
then instead (and in any case where # of bytes < 256).
c @ s e Zd Zd Zdd� Zdd� ZdS )
� StackObjectr �obtyper c C s. || _ t|t�r x |D ]}qW || _|| _d S )N)r �
isinstance�tuplerd r )r r rd r Z containedr r r r � s
zStackObject.__init__c C s | j S )N)r )r r r r �__repr__� s zStackObject.__repr__N)r rd r )r r r r r rg r r r r rc � s
rc rR zA Python integer object.)r rd r Z int_or_boolz#A Python integer or boolean object.�boolzA Python boolean object.rY zA Python float object.Z bytes_or_strz*A Python bytes or (Unicode) string object.�byteszA Python bytes object.rH z!A Python (Unicode) string object.�NonezThe Python None object.rf zA Python tuple object.�listzA Python list object.�dictzA Python dict object.�setzA Python set object.� frozensetzA Python frozenset object.�anyz Any kind of object whatsoever.Zmarkaz 'The mark' is a unique object.
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generally don't embed the count of objects in the opcode,
or pull it off the stack. Instead the MARK opcode is used
to push a special marker object on the stack, and then
some other opcodes grab all the objects from the top of
the stack down to (but not including) the topmost marker
object.
�
stackslicea� An object representing a contiguous slice of the stack.
This is used in conjunction with markobject, to represent all
of the stack following the topmost markobject. For example,
the POP_MARK opcode changes the stack from
[..., markobject, stackslice]
to
[...]
No matter how many object are on the stack after the topmost
markobject, POP_MARK gets rid of all of them (including the
topmost markobject too).
c @ s e Zd Zd Zdd � Zd
S ) �
OpcodeInfor �code�arg� stack_before� stack_after�protor c C sJ || _ || _|| _x |D ]}qW || _x |D ]}q,W || _|| _|| _d S )N)r rr rs rt ru rv r ) r r rr rs rt ru rv r �xr r r r T s
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but INT can be generated in pickles written on a 64-bit box that
require a Python long on a 32-bit box. The difference between this
and LONG then is that INT skips a trailing 'L', and produces a short
int whenever possible.
Another difference is due to that, when bool was introduced as a
distinct type in 2.3, builtin names True and False were also added to
2.2.2, mapping to ints 1 and 0. For compatibility in both directions,
True gets pickled as INT + "I01\n", and False as INT + "I00\n".
Leading zeroes are never produced for a genuine integer. The 2.3
(and later) unpicklers special-case these and return bool instead;
earlier unpicklers ignore the leading "0" and return the int.
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This handles the full range of Python (short) integers on a 32-bit
box, directly as binary bytes (1 for the opcode and 4 for the integer).
If the integer is non-negative and fits in 1 or 2 bytes, pickling via
BININT1 or BININT2 saves space.
ZBININT1�Kz�Push a one-byte unsigned integer.
This is a space optimization for pickling very small non-negative ints,
in range(256).
ZBININT2�Mz�Push a two-byte unsigned integer.
This is a space optimization for pickling small positive ints, in
range(256, 2**16). Integers in range(256) can also be pickled via
BININT2, but BININT1 instead saves a byte.
ZLONG�La� Push a long integer.
The same as INT, except that the literal ends with 'L', and always
unpickles to a Python long. There doesn't seem a real purpose to the
trailing 'L'.
Note that LONG takes time quadratic in the number of digits when
unpickling (this is simply due to the nature of decimal->binary
conversion). Proto 2 added linear-time (in C; still quadratic-time
in Python) LONG1 and LONG4 opcodes.
ZLONG1� z|Long integer using one-byte length.
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says it all.ZLONG4� z~Long integer using found-byte length.
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The argument is a repr-style string, with bracketing quote characters,
and perhaps embedded escapes. The argument extends until the next
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'ASCII'. If the encoding given was 'bytes' however, they will be
decoded as bytes object instead.
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There are two arguments: the first is a 4-byte little-endian
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content. These are usually decoded into a str instance using the
encoding given to the Unpickler constructor. or the default,
'ASCII'. If the encoding given was 'bytes' however, they will be
decoded as bytes object instead.
ZSHORT_BINSTRING�Ua� Push a Python string object.
There are two arguments: the first is a 1-byte unsigned int giving
the number of bytes in the string, and the second is that many
bytes, which are taken literally as the string content. These are
usually decoded into a str instance using the encoding given to
the Unpickler constructor. or the default, 'ASCII'. If the
encoding given was 'bytes' however, they will be decoded as bytes
object instead.
ZBINBYTES�Bz�Push a Python bytes object.
There are two arguments: the first is a 4-byte little-endian unsigned int
giving the number of bytes, and the second is that many bytes, which are
taken literally as the bytes content.
ZSHORT_BINBYTES�Cz�Push a Python bytes object.
There are two arguments: the first is a 1-byte unsigned int giving
the number of bytes, and the second is that many bytes, which are taken
literally as the string content.
Z BINBYTES8� z�Push a Python bytes object.
There are two arguments: the first is an 8-byte unsigned int giving
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which are taken literally as the string content.
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until the next newline character.
ZSHORT_BINUNICODE� a Push a Python Unicode string object.
There are two arguments: the first is a 1-byte little-endian signed int
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bytes, and is the UTF-8 encoding of the Unicode string.
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BINUNICODE�Xa Push a Python Unicode string object.
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bytes, and is the UTF-8 encoding of the Unicode string.
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There are two arguments: the first is an 8-byte little-endian signed int
giving the number of bytes in the string. The second is that many
bytes, and is the UTF-8 encoding of the Unicode string.
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The argument is repr(a_float), and in general requires 17 significant
digits for roundtrip conversion to be an identity (this is so for
IEEE-754 double precision values, which is what Python float maps to
on most boxes).
In general, FLOAT cannot be used to transport infinities, NaNs, or
minus zero across boxes (or even on a single box, if the platform C
library can't read the strings it produces for such things -- Windows
is like that), but may do less damage than BINFLOAT on boxes with
greater precision or dynamic range than IEEE-754 double.
ZBINFLOAT�Ga� Float stored in binary form, with 8 bytes of data.
This generally requires less than half the space of FLOAT encoding.
In general, BINFLOAT cannot be used to transport infinities, NaNs, or
minus zero, raises an exception if the exponent exceeds the range of
an IEEE-754 double, and retains no more than 53 bits of precision (if
there are more than that, "add a half and chop" rounding is used to
cut it back to 53 significant bits).
Z
EMPTY_LIST�]zPush an empty list.ZAPPEND�az�Append an object to a list.
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although pylist is really extended in-place.
ZAPPENDS�ez�Extend a list by a slice of stack objects.
Stack before: ... pylist markobject stackslice
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although pylist is really extended in-place.
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All the stack entries following the topmost markobject are placed into
a single Python list, which single list object replaces all of the
stack from the topmost markobject onward. For example,
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Stack after: ... [1, 2, 3, 'abc']
Z EMPTY_TUPLE�)zPush an empty tuple.ZTUPLE�tav Build a tuple out of the topmost stack slice, after markobject.
All the stack entries following the topmost markobject are placed into
a single Python tuple, which single tuple object replaces all of the
stack from the topmost markobject onward. For example,
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Stack after: ... (1, 2, 3, 'abc')
ZTUPLE1�
z�Build a one-tuple out of the topmost item on the stack.
This code pops one value off the stack and pushes a tuple of
length 1 whose one item is that value back onto it. In other
words:
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ZTUPLE2� a Build a two-tuple out of the top two items on the stack.
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length 2 whose items are those values back onto it. In other
words:
stack[-2:] = [tuple(stack[-2:])]
ZTUPLE3� a Build a three-tuple out of the top three items on the stack.
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length 3 whose items are those values back onto it. In other
words:
stack[-3:] = [tuple(stack[-3:])]
Z
EMPTY_DICT�}zPush an empty dict.ZDICT�da� Build a dict out of the topmost stack slice, after markobject.
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stack from the topmost markobject onward. The stack slice alternates
key, value, key, value, .... For example,
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Stack after: ... {1: 2, 3: 'abc'}
ZSETITEMrS z�Add a key+value pair to an existing dict.
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ZSETITEMS�ua\ Add an arbitrary number of key+value pairs to an existing dict.
The slice of the stack following the topmost markobject is taken as
an alternating sequence of keys and values, added to the dict
immediately under the topmost markobject. Everything at and after the
topmost markobject is popped, leaving the mutated dict at the top
of the stack.
Stack before: ... pydict markobject key_1 value_1 ... key_n value_n
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where pydict has been modified via pydict[key_i] = value_i for i in
1, 2, ..., n, and in that order.
Z EMPTY_SET� zPush an empty set.ZADDITEMS� a$ Add an arbitrary number of items to an existing set.
The slice of the stack following the topmost markobject is taken as
a sequence of items, added to the set immediately under the topmost
markobject. Everything at and after the topmost markobject is popped,
leaving the mutated set at the top of the stack.
Stack before: ... pyset markobject item_1 ... item_n
Stack after: ... pyset
where pyset has been modified via pyset.add(item_i) = item_i for i in
1, 2, ..., n, and in that order.
Z FROZENSET� az Build a frozenset out of the topmost slice, after markobject.
All the stack entries following the topmost markobject are placed into
a single Python frozenset, which single frozenset object replaces all
of the stack from the topmost markobject onward. For example,
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�POP�0z<Discard the top stack item, shrinking the stack by one item.ZDUP�2z=Push the top stack item onto the stack again, duplicating it.�MARK�(z�Push markobject onto the stack.
markobject is a unique object, used by other opcodes to identify a
region of the stack containing a variable number of objects for them
to work on. See markobject.doc for more detail.
ZPOP_MARK�1a Pop all the stack objects at and above the topmost markobject.
When an opcode using a variable number of stack objects is done,
POP_MARK is used to remove those objects, and to remove the markobject
that delimited their starting position on the stack.
�GET�gz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the newline-terminated
decimal string following. BINGET and LONG_BINGET are space-optimized
versions.
�BINGET�hz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 1-byte unsigned
integer following.
� LONG_BINGET�jz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 4-byte unsigned
little-endian integer following.
�PUT�pz�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the newline-
terminated decimal string following. BINPUT and LONG_BINPUT are
space-optimized versions.
�BINPUTr5 z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 1-byte
unsigned integer following.
� LONG_BINPUT�rz�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 4-byte
unsigned little-endian integer following.
�MEMOIZE� z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write is the number of
elements currently present in the memo.
ZEXT1� a� Extension code.
This code and the similar EXT2 and EXT4 allow using a registry
of popular objects that are pickled by name, typically classes.
It is envisioned that through a global negotiation and
registration process, third parties can set up a mapping between
ints and object names.
In order to guarantee pickle interchangeability, the extension
code registry ought to be global, although a range of codes may
be reserved for private use.
EXT1 has a 1-byte integer argument. This is used to index into the
extension registry, and the object at that index is pushed on the stack.
ZEXT2� zNExtension code.
See EXT1. EXT2 has a two-byte integer argument.
ZEXT4� zOExtension code.
See EXT1. EXT4 has a four-byte integer argument.
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Two newline-terminated strings follow the GLOBAL opcode. The first is
taken as a module name, and the second as a class name. The class
object module.class is pushed on the stack. More accurately, the
object returned by self.find_class(module, class) is pushed on the
stack, so unpickling subclasses can override this form of lookup.
Z STACK_GLOBAL� z7Push a global object (module.attr) on the stack.
ZREDUCE�RaL Push an object built from a callable and an argument tuple.
The opcode is named to remind of the __reduce__() method.
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The callable and the argument tuple are the first two items returned
by a __reduce__ method. Applying the callable to the argtuple is
supposed to reproduce the original object, or at least get it started.
If the __reduce__ method returns a 3-tuple, the last component is an
argument to be passed to the object's __setstate__, and then the REDUCE
opcode is followed by code to create setstate's argument, and then a
BUILD opcode to apply __setstate__ to that argument.
If not isinstance(callable, type), REDUCE complains unless the
callable has been registered with the copyreg module's
safe_constructors dict, or the callable has a magic
'__safe_for_unpickling__' attribute with a true value. I'm not sure
why it does this, but I've sure seen this complaint often enough when
I didn't want to <wink>.
ZBUILD�ba� Finish building an object, via __setstate__ or dict update.
Stack before: ... anyobject argument
Stack after: ... anyobject
where anyobject may have been mutated, as follows:
If the object has a __setstate__ method,
anyobject.__setstate__(argument)
is called.
Else the argument must be a dict, the object must have a __dict__, and
the object is updated via
anyobject.__dict__.update(argument)
ZINST�iaq Build a class instance.
This is the protocol 0 version of protocol 1's OBJ opcode.
INST is followed by two newline-terminated strings, giving a
module and class name, just as for the GLOBAL opcode (and see
GLOBAL for more details about that). self.find_class(module, name)
is used to get a class object.
In addition, all the objects on the stack following the topmost
markobject are gathered into a tuple and popped (along with the
topmost markobject), just as for the TUPLE opcode.
Now it gets complicated. If all of these are true:
+ The argtuple is empty (markobject was at the top of the stack
at the start).
+ The class object does not have a __getinitargs__ attribute.
then we want to create an old-style class instance without invoking
its __init__() method (pickle has waffled on this over the years; not
calling __init__() is current wisdom). In this case, an instance of
an old-style dummy class is created, and then we try to rebind its
__class__ attribute to the desired class object. If this succeeds,
the new instance object is pushed on the stack, and we're done.
Else (the argtuple is not empty, it's not an old-style class object,
or the class object does have a __getinitargs__ attribute), the code
first insists that the class object have a __safe_for_unpickling__
attribute. Unlike as for the __safe_for_unpickling__ check in REDUCE,
it doesn't matter whether this attribute has a true or false value, it
only matters whether it exists (XXX this is a bug). If
__safe_for_unpickling__ doesn't exist, UnpicklingError is raised.
Else (the class object does have a __safe_for_unpickling__ attr),
the class object obtained from INST's arguments is applied to the
argtuple obtained from the stack, and the resulting instance object
is pushed on the stack.
NOTE: checks for __safe_for_unpickling__ went away in Python 2.3.
NOTE: the distinction between old-style and new-style classes does
not make sense in Python 3.
ZOBJ�oa� Build a class instance.
This is the protocol 1 version of protocol 0's INST opcode, and is
very much like it. The major difference is that the class object
is taken off the stack, allowing it to be retrieved from the memo
repeatedly if several instances of the same class are created. This
can be much more efficient (in both time and space) than repeatedly
embedding the module and class names in INST opcodes.
Unlike INST, OBJ takes no arguments from the opcode stream. Instead
the class object is taken off the stack, immediately above the
topmost markobject:
Stack before: ... markobject classobject stackslice
Stack after: ... new_instance_object
As for INST, the remainder of the stack above the markobject is
gathered into an argument tuple, and then the logic seems identical,
except that no __safe_for_unpickling__ check is done (XXX this is
a bug). See INST for the gory details.
NOTE: In Python 2.3, INST and OBJ are identical except for how they
get the class object. That was always the intent; the implementations
had diverged for accidental reasons.
ZNEWOBJ� aL Build an object instance.
The stack before should be thought of as containing a class
object followed by an argument tuple (the tuple being the stack
top). Call these cls and args. They are popped off the stack,
and the value returned by cls.__new__(cls, *args) is pushed back
onto the stack.
Z NEWOBJ_EX� au Build an object instance.
The stack before should be thought of as containing a class
object followed by an argument tuple and by a keyword argument dict
(the dict being the stack top). Call these cls and args. They are
popped off the stack, and the value returned by
cls.__new__(cls, *args, *kwargs) is pushed back onto the stack.
�PROTO� z�Protocol version indicator.
For protocol 2 and above, a pickle must start with this opcode.
The argument is the protocol version, an int in range(2, 256).
ZSTOP�.z�Stop the unpickling machine.
Every pickle ends with this opcode. The object at the top of the stack
is popped, and that's the result of unpickling. The stack should be
empty then.
�FRAME� z�Indicate the beginning of a new frame.
The unpickler may use this opcode to safely prefetch data from its
underlying stream.
ZPERSID�Pa Push an object identified by a persistent ID.
The pickle module doesn't define what a persistent ID means. PERSID's
argument is a newline-terminated str-style (no embedded escapes, no
bracketing quote characters) string, which *is* "the persistent ID".
The unpickler passes this string to self.persistent_load(). Whatever
object that returns is pushed on the stack. There is no implementation
of persistent_load() in Python's unpickler: it must be supplied by an
unpickler subclass.
Z BINPERSID�QaX Push an object identified by a persistent ID.
Like PERSID, except the persistent ID is popped off the stack (instead
of being a string embedded in the opcode bytestream). The persistent
ID is passed to self.persistent_load(), and whatever object that
returns is pushed on the stack. See PERSID for more detail.
z%repeated name %r at indices %d and %dz%repeated code %r at indices %d and %dFc C s t j� }x�tjD ]�}tjd|�s2| rtd| � qtt|�}t|t � sTt
|�dkrj| rtd||f � q|j d�}||kr�| r�td||f � || }|j |kr�t
d|||j f ��||= qt
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each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
If the opcode has an argument embedded in the pickle, arg is its decoded
value, as a Python object. If the opcode doesn't have an argument, arg
is None.
If the pickle has a tell() method, pos was the value of pickle.tell()
before reading the current opcode. If the pickle is a bytes object,
it's wrapped in a BytesIO object, and the latter's tell() result is
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d | ��dS )'aK Produce a symbolic disassembly of a pickle.
'pickle' is a file-like object, or string, containing a (at least one)
pickle. The pickle is disassembled from the current position, through
the first STOP opcode encountered.
Optional arg 'out' is a file-like object to which the disassembly is
printed. It defaults to sys.stdout.
Optional arg 'memo' is a Python dict, used as the pickle's memo. It
may be mutated by dis(), if the pickle contains PUT or BINPUT opcodes.
Passing the same memo object to another dis() call then allows disassembly
to proceed across multiple pickles that were all created by the same
pickler with the same memo. Ordinarily you don't need to worry about this.
Optional arg 'indentlevel' is the number of blanks by which to indent
a new MARK level. It defaults to 4.
Optional arg 'annotate' if nonzero instructs dis() to add short
description of the opcode on each line of disassembled output.
The value given to 'annotate' must be an integer and is used as a
hint for the column where annotation should start. The default
value is 0, meaning no annotations.
In addition to printing the disassembly, some sanity checks are made:
+ All embedded opcode arguments "make sense".
+ Explicit and implicit pop operations have enough items on the stack.
+ When an opcode implicitly refers to a markobject, a markobject is
actually on the stack.
+ A memo entry isn't referenced before it's defined.
+ The markobject isn't stored in the memo.
+ A memo entry isn't redefined.
Nr � z%5d:)�end�filez %-4s %s%sr� z (MARK at unknown opcode offset)z (MARK at %d)r zno MARK exists on stackr� r� r� r� z(as %d)zmemo key %r already definedz'stack is empty -- can't store into memoz"can't store markobject in the memor� r� r� z&memo key %r has never been stored into�
�2 r� )r� z3tries to pop %d items from stack with only %d itemsz highest protocol among opcodes =z stack not empty after STOP: %rr- r- r- r- )r� r� r� r� r- r- )r� r� r� )r r� �reprrr r r �maxrv rt ru �
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>>> import pickle
>>> x = [1, 2, (3, 4), {b'abc': "def"}]
>>> pkl0 = pickle.dumps(x, 0)
>>> dis(pkl0)
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: L LONG 1
9: a APPEND
10: L LONG 2
14: a APPEND
15: ( MARK
16: L LONG 3
20: L LONG 4
24: t TUPLE (MARK at 15)
25: p PUT 1
28: a APPEND
29: ( MARK
30: d DICT (MARK at 29)
31: p PUT 2
34: c GLOBAL '_codecs encode'
50: p PUT 3
53: ( MARK
54: V UNICODE 'abc'
59: p PUT 4
62: V UNICODE 'latin1'
70: p PUT 5
73: t TUPLE (MARK at 53)
74: p PUT 6
77: R REDUCE
78: p PUT 7
81: V UNICODE 'def'
86: p PUT 8
89: s SETITEM
90: a APPEND
91: . STOP
highest protocol among opcodes = 0
Try again with a "binary" pickle.
>>> pkl1 = pickle.dumps(x, 1)
>>> dis(pkl1)
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: K BININT1 1
6: K BININT1 2
8: ( MARK
9: K BININT1 3
11: K BININT1 4
13: t TUPLE (MARK at 8)
14: q BINPUT 1
16: } EMPTY_DICT
17: q BINPUT 2
19: c GLOBAL '_codecs encode'
35: q BINPUT 3
37: ( MARK
38: X BINUNICODE 'abc'
46: q BINPUT 4
48: X BINUNICODE 'latin1'
59: q BINPUT 5
61: t TUPLE (MARK at 37)
62: q BINPUT 6
64: R REDUCE
65: q BINPUT 7
67: X BINUNICODE 'def'
75: q BINPUT 8
77: s SETITEM
78: e APPENDS (MARK at 3)
79: . STOP
highest protocol among opcodes = 1
Exercise the INST/OBJ/BUILD family.
>>> import pickletools
>>> dis(pickle.dumps(pickletools.dis, 0))
0: c GLOBAL 'pickletools dis'
17: p PUT 0
20: . STOP
highest protocol among opcodes = 0
>>> from pickletools import _Example
>>> x = [_Example(42)] * 2
>>> dis(pickle.dumps(x, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: c GLOBAL 'copy_reg _reconstructor'
30: p PUT 1
33: ( MARK
34: c GLOBAL 'pickletools _Example'
56: p PUT 2
59: c GLOBAL '__builtin__ object'
79: p PUT 3
82: N NONE
83: t TUPLE (MARK at 33)
84: p PUT 4
87: R REDUCE
88: p PUT 5
91: ( MARK
92: d DICT (MARK at 91)
93: p PUT 6
96: V UNICODE 'value'
103: p PUT 7
106: L LONG 42
111: s SETITEM
112: b BUILD
113: a APPEND
114: g GET 5
117: a APPEND
118: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(x, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: c GLOBAL 'copy_reg _reconstructor'
29: q BINPUT 1
31: ( MARK
32: c GLOBAL 'pickletools _Example'
54: q BINPUT 2
56: c GLOBAL '__builtin__ object'
76: q BINPUT 3
78: N NONE
79: t TUPLE (MARK at 31)
80: q BINPUT 4
82: R REDUCE
83: q BINPUT 5
85: } EMPTY_DICT
86: q BINPUT 6
88: X BINUNICODE 'value'
98: q BINPUT 7
100: K BININT1 42
102: s SETITEM
103: b BUILD
104: h BINGET 5
106: e APPENDS (MARK at 3)
107: . STOP
highest protocol among opcodes = 1
Try "the canonical" recursive-object test.
>>> L = []
>>> T = L,
>>> L.append(T)
>>> L[0] is T
True
>>> T[0] is L
True
>>> L[0][0] is L
True
>>> T[0][0] is T
True
>>> dis(pickle.dumps(L, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: ( MARK
6: g GET 0
9: t TUPLE (MARK at 5)
10: p PUT 1
13: a APPEND
14: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(L, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: h BINGET 0
6: t TUPLE (MARK at 3)
7: q BINPUT 1
9: a APPEND
10: . STOP
highest protocol among opcodes = 1
Note that, in the protocol 0 pickle of the recursive tuple, the disassembler
has to emulate the stack in order to realize that the POP opcode at 16 gets
rid of the MARK at 0.
>>> dis(pickle.dumps(T, 0))
0: ( MARK
1: ( MARK
2: l LIST (MARK at 1)
3: p PUT 0
6: ( MARK
7: g GET 0
10: t TUPLE (MARK at 6)
11: p PUT 1
14: a APPEND
15: 0 POP
16: 0 POP (MARK at 0)
17: g GET 1
20: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(T, 1))
0: ( MARK
1: ] EMPTY_LIST
2: q BINPUT 0
4: ( MARK
5: h BINGET 0
7: t TUPLE (MARK at 4)
8: q BINPUT 1
10: a APPEND
11: 1 POP_MARK (MARK at 0)
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 1
Try protocol 2.
>>> dis(pickle.dumps(L, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: . STOP
highest protocol among opcodes = 2
>>> dis(pickle.dumps(T, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: 0 POP
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 2
Try protocol 3 with annotations:
>>> dis(pickle.dumps(T, 3), annotate=1)
0: \x80 PROTO 3 Protocol version indicator.
2: ] EMPTY_LIST Push an empty list.
3: q BINPUT 0 Store the stack top into the memo. The stack is not popped.
5: h BINGET 0 Read an object from the memo and push it on the stack.
7: \x85 TUPLE1 Build a one-tuple out of the topmost item on the stack.
8: q BINPUT 1 Store the stack top into the memo. The stack is not popped.
10: a APPEND Append an object to a list.
11: 0 POP Discard the top stack item, shrinking the stack by one item.
12: h BINGET 1 Read an object from the memo and push it on the stack.
14: . STOP Stop the unpickling machine.
highest protocol among opcodes = 2
a=
>>> import pickle
>>> import io
>>> f = io.BytesIO()
>>> p = pickle.Pickler(f, 2)
>>> x = [1, 2, 3]
>>> p.dump(x)
>>> p.dump(x)
>>> f.seek(0)
0
>>> memo = {}
>>> dis(f, memo=memo)
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: ( MARK
6: K BININT1 1
8: K BININT1 2
10: K BININT1 3
12: e APPENDS (MARK at 5)
13: . STOP
highest protocol among opcodes = 2
>>> dis(f, memo=memo)
14: \x80 PROTO 2
16: h BINGET 0
18: . STOP
highest protocol among opcodes = 2
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fromshare() -- create a socket object from data received from socket.share() [*]
gethostname() -- return the current hostname
gethostbyname() -- map a hostname to its IP number
gethostbyaddr() -- map an IP number or hostname to DNS info
getservbyname() -- map a service name and a protocol name to a port number
getprotobyname() -- map a protocol name (e.g. 'tcp') to a number
ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
htons(), htonl() -- convert 16, 32 bit int from host to network byte order
inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
socket.getdefaulttimeout() -- get the default timeout value
socket.setdefaulttimeout() -- set the default timeout value
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[*] not available on all platforms!
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Command-line parsing library
This module is an optparse-inspired command-line parsing library that:
- handles both optional and positional arguments
- produces highly informative usage messages
- supports parsers that dispatch to sub-parsers
The following is a simple usage example that sums integers from the
command-line and writes the result to a file::
parser = argparse.ArgumentParser(
description='sum the integers at the command line')
parser.add_argument(
'integers', metavar='int', nargs='+', type=int,
help='an integer to be summed')
parser.add_argument(
'--log', default=sys.stdout, type=argparse.FileType('w'),
help='the file where the sum should be written')
args = parser.parse_args()
args.log.write('%s' % sum(args.integers))
args.log.close()
The module contains the following public classes:
- ArgumentParser -- The main entry point for command-line parsing. As the
example above shows, the add_argument() method is used to populate
the parser with actions for optional and positional arguments. Then
the parse_args() method is invoked to convert the args at the
command-line into an object with attributes.
- ArgumentError -- The exception raised by ArgumentParser objects when
there are errors with the parser's actions. Errors raised while
parsing the command-line are caught by ArgumentParser and emitted
as command-line messages.
- FileType -- A factory for defining types of files to be created. As the
example above shows, instances of FileType are typically passed as
the type= argument of add_argument() calls.
- Action -- The base class for parser actions. Typically actions are
selected by passing strings like 'store_true' or 'append_const' to
the action= argument of add_argument(). However, for greater
customization of ArgumentParser actions, subclasses of Action may
be defined and passed as the action= argument.
- HelpFormatter, RawDescriptionHelpFormatter, RawTextHelpFormatter,
ArgumentDefaultsHelpFormatter -- Formatter classes which
may be passed as the formatter_class= argument to the
ArgumentParser constructor. HelpFormatter is the default,
RawDescriptionHelpFormatter and RawTextHelpFormatter tell the parser
not to change the formatting for help text, and
ArgumentDefaultsHelpFormatter adds information about argument defaults
to the help.
All other classes in this module are considered implementation details.
(Also note that HelpFormatter and RawDescriptionHelpFormatter are only
considered public as object names -- the API of the formatter objects is
still considered an implementation detail.)
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should be associated with this action.
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- const -- The value to be produced if the option is specified and the
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str is used.
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type, an exception will be raised if it is not a member of this
collection.
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z _WildcardSelector._select_fromN)r: r; r< r$ r� r r r r r� � s r� c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )r� c C s t j| |� d S )N)r� r$ )r# r r� r r r r$ � s z#_RecursiveWildcardSelector.__init__c c sz |V yZt ||��}xH|D ]@}|j� r|j� r|j|j�}x | j|||�D ]
}|V qLW qW W n tk
rt d S X d S )N)r� r� �
is_symlinkr� rv �_iterate_directoriesr� )r# r� r� r� r� r� rh r[ r r r r� � s
z/_RecursiveWildcardSelector._iterate_directoriesc c s� yjt � }zT| jj}xF| j|||�D ]4}x.|||||�D ] }||kr6|V |j|� q6W q"W W d |j� X W n tk
r~ d S X d S )N)rx r� r� r� �add�clearr� ) r# r� r� r� r� ZyieldedZsuccessor_selectZstarting_pointr[ r r r r� � s z'_RecursiveWildcardSelector._select_fromN)r: r; r< r$ r� r� r r r r r� � s r� c @ s4 e Zd ZdZdZdd� Zdd � Zd
d � Zd d
� ZdS )� _PathParentszvThis object provides sequence-like access to the logical ancestors
of a path. Don't try to construct it yourself.�_pathcls�_drv�_root�_partsc C s& t |�| _|j| _|j| _|j| _d S )N)r� r� r� r� r� )r# rh r r r r$ � s
z_PathParents.__init__c C s( | j s | jrt| j�d S t| j�S d S )Nr7 )r� r� rR r� )r# r r r �__len__� s z_PathParents.__len__c C s@ |dk s|t | �kr t|��| jj| j| j| jd | d � �S )Nr r7 )rR �
IndexErrorr� �_from_parsed_partsr� r� r� )r# �idxr r r � __getitem__ s z_PathParents.__getitem__c C s dj | jj�S )Nz <{}.parents>)�formatr� r: )r# r r r �__repr__
s z_PathParents.__repr__N)r� r� r� r� ) r: r; r< r= � __slots__r$ r� r� r� r r r r r� � s r� c @ s� e Zd ZdZdZZd d
� Zd d � Zed
d� �Zed[dd��Z ed\dd��Z
edd� �Z dd� Z dd� Z
dd� Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� Zed&d'� �Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� Zd2d3� Zee d�d4d5�Z ee d�d6d5�Z ed7d8� �Z ed9d:� �Z ed;d<� �Z!ed=d>� �Z"ed?d@� �Z#dAdB� Z$dCdD� Z%dEdF� Z&edGdH� �Z'dIdJ� Z(dKdL� Z)dMdN� Z*edOdP� �Z+edQdR� �Z,dSdT� Z-dUdV� Z.dWdX� Z/dYS )]r a| Base class for manipulating paths without I/O.
PurePath represents a filesystem path and offers operations which
don't imply any actual filesystem I/O. Depending on your system,
instantiating a PurePath will return either a PurePosixPath or a
PureWindowsPath object. You can also instantiate either of these classes
directly, regardless of your system.
r� r� r� �_str�_hash�_pparts�_cached_cpartsc G s$ | t krtjdkrtnt} | j|�S )z�Construct a PurePath from one or several strings and or existing
PurePath objects. The strings and path objects are combined so as
to yield a canonicalized path, which is incorporated into the
new PurePath object.
rA )r rl rv r r � _from_parts)r� r� r r r �__new__ s zPurePath.__new__c C s | j t| j�fS )N)� __class__�tupler� )r# r r r �
__reduce__& s zPurePath.__reduce__c C sh g }xV|D ]N}t |t�r$||j7 }q
tj|�}t |t�rH|jt|�� q
tdt|� ��q
W | j j
|�S )NzNargument should be a str object or an os.PathLike object returning str, not %r) �
isinstancer r� rl �fspathr� r, � TypeErrorr� r� r6 )r� r� r0 rE r r r � _parse_args+ s
zPurePath._parse_argsTc C s< t j| �}|j|�\}}}||_||_||_|r8|j� |S )N)�objectr� r� r� r� r� �_init)r� r� �initr# r1 r2 r0 r r r r� ? s
zPurePath._from_partsc C s, t j| �}||_||_||_|r(|j� |S )N)r� r� r� r� r� r� )r� r1 r2 r0 r� r# r r r r� L s
zPurePath._from_parsed_partsc C s4 |s|r$|| | j j|dd � � S | j j|�S d S )Nr7 )r� r" )r� r1 r2 r0 r r r �_format_parsed_partsV s z PurePath._format_parsed_partsc C s d S )Nr )r# r r r r� ] s zPurePath._initc C s@ | j |�\}}}| jj| j| j| j|||�\}}}| j|||�S )N)r� r� r9 r� r� r� r� )r# r� r1 r2 r0 r r r � _make_childa s zPurePath._make_childc C s< y| j S tk
r6 | j| j| j| j�p,d| _ | j S X dS )z[Return the string representation of the path, suitable for
passing to system calls.r& N)r� �AttributeErrorr� r� r� r� )r# r r r �__str__g s zPurePath.__str__c C s t | �S )N)r� )r# r r r �
__fspath__q s zPurePath.__fspath__c C s | j }t| �j|jd�S )zNReturn the string representation of the path with forward (/)
slashes.r@ )r� r� r) r! )r# �fr r r re t s zPurePath.as_posixc C s t jt| ��S )zaReturn the bytes representation of the path. This is only
recommended to use under Unix.)rl �fsencoder� )r# r r r � __bytes__z s zPurePath.__bytes__c C s dj | jj| j� �S )Nz{}({!r}))r� r� r: re )r# r r r r� s zPurePath.__repr__c C s | j � std��| jj| �S )z Return the path as a 'file' URI.z.relative path can't be expressed as a file URI)� is_absoluter� r� rj )r# r r r �as_uri� s zPurePath.as_uric C s2 y| j S tk
r, | jj| j�| _ | j S X d S )N)r� r� r� r] r� )r# r r r �_cparts� s
zPurePath._cpartsc C s& t |t�stS | j|jko$| j|jkS )N)r� r �NotImplementedr� r� )r# �otherr r r �__eq__� s
zPurePath.__eq__c C s2 y| j S tk
r, tt| j��| _ | j S X d S )N)r� r� �hashr� r� )r# r r r �__hash__� s
zPurePath.__hash__c C s( t |t� s| j|jk r tS | j|jk S )N)r� r r� r� r� )r# r� r r r �__lt__� s zPurePath.__lt__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__le__� s zPurePath.__le__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__gt__� s zPurePath.__gt__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__ge__� s zPurePath.__ge__z.The drive prefix (letter or UNC path), if any.)�docz The root of the path, if any.c C s | j | j }|S )z/The concatenation of the drive and root, or ''.)r� r� )r# �anchorr r r r� � s zPurePath.anchorc C s. | j }t|�| js| jr dndkr&dS |d S )z!The final path component, if any.r7 r r% rO )r� rR r� r� )r# r0 r r r rv � s z
PurePath.namec C sD | j }|jd�}d| k o*t|�d k n r<||d� S dS dS )z*The final component's last suffix, if any.r& r r7 Nr% )rv �rfindrR )r# rv rI r r r �suffix� s
zPurePath.suffixc C s: | j }|jd�rg S |jd�}dd� |jd�dd� D �S )z1A list of the final component's suffixes, if any.r& c S s g | ] }d | �qS )r& r )rC r� r r r r\ � s z%PurePath.suffixes.<locals>.<listcomp>r7 N)rv �endswithrT r+ )r# rv r r r �suffixes� s
zPurePath.suffixesc C sD | j }|jd�}d| k o*t|�d k n r<|d|� S |S dS )z0The final path component, minus its last suffix.r& r r7 N)rv r� rR )r# rv rI r r r �stem� s
z
PurePath.stemc C s� | j std| f ��| jj|f�\}}}| sZ|d | jj| jjgksZ|sZ|sZt|�dkrftd| ��| j| j| j | j
dd� |g �S )z-Return a new path with the file name changed.z%r has an empty namer7 zInvalid name %rNrO rO ) rv r� r� r6 r! r' rR r� r� r� r� )r# rv r1 r2 r0 r r r � with_name� s zPurePath.with_namec C s� | j }|j|ks |jr,|j|kr,td| ��|r<|jd� sD|dkrPtd| ��| j}|shtd| f ��| j}|s||| }n|dt|� � | }| j| j | j
| j dd� |g �S )z�Return a new path with the file suffix changed. If the path
has no suffix, add given suffix. If the given suffix is an empty
string, remove the suffix from the path.
zInvalid suffix %rr& z%r has an empty nameNr7 rO ) r� r! r' r� r_ rv r� rR r� r� r� r� )r# r� r� rv Z
old_suffixr r r � with_suffix� s
zPurePath.with_suffixc
G s� |s t d��| j}| j}| j}|r8||g|dd� }n|}| j|�\}}}|rf||g|dd� } n|} t| �}
| jj} |
dkr�|p�|n| |d|
� �| | �kr�| j|||�} t dj
t | �t | ����| j d|
dkr�|nd||
d� �S )z�Return the relative path to another path identified by the passed
arguments. If the operation is not possible (because this is not
a subpath of the other path), raise ValueError.
zneed at least one argumentr7 Nr z {!r} does not start with {!r}r% )
r� r� r� r� r� rR r� r] r� r� r� r� r� )
r# r� r0 r1 r2 Z abs_partsZto_drvZto_rootZto_partsZ to_abs_parts�nr� Z formattedr r r � relative_to s( (zPurePath.relative_toc C s. y| j S tk
r( t| j�| _ | j S X dS )zZAn object providing sequence-like access to the
components in the filesystem path.N)r� r� r� r� )r# r r r r0 " s
zPurePath.partsc G s
| j |�S )z�Combine this path with one or several arguments, and return a
new path representing either a subpath (if all arguments are relative
paths) or a totally different path (if one of the arguments is
anchored).
)r� )r# r� r r r �joinpath. s zPurePath.joinpathc C s | j |f�S )N)r� )r# �keyr r r � __truediv__6 s zPurePath.__truediv__c C s | j |g| j �S )N)r� r� )r# r r r r � __rtruediv__9 s zPurePath.__rtruediv__c C s@ | j }| j}| j}t|�dkr*|s&|r*| S | j|||dd� �S )z The logical parent of the path.r7 NrO )r� r� r� rR r� )r# r1 r2 r0 r r r �parent< s zPurePath.parentc C s t | �S )z*A sequence of this path's logical parents.)r� )r# r r r �parentsF s zPurePath.parentsc C s | j s
dS | jj p t| j�S )zSTrue if the path is absolute (has both a root and, if applicable,
a drive).F)r� r� rs �boolr� )r# r r r r� K s zPurePath.is_absolutec C s | j j| j�S )zaReturn True if the path contains one of the special names reserved
by the system, if any.)r� rc r� )r# r r r rc R s zPurePath.is_reservedc C s� | j j}||�}| j j|f�\}}}|s0td��|rF||| j�krFdS |r\||| j�kr\dS | j}|sj|r�t|�t|�kr~dS |dd� }nt|�t|�kr�dS x.tt |�t |��D ]\}}t
j ||�s�dS q�W dS )zE
Return True if this path matches the given pattern.
z
empty patternFr7 NT) r� r8 r6 r� r� r� r� rR �zipr( r� Z fnmatchcase) r# Z path_patternr� r1 r2 Z pat_partsr0 r4 r r r r r� W s( zPurePath.matchN)r� r� r� r� r� r� r� )T)T)0r: r; r< r= r� r� r� � classmethodr� r� r� r� r� r� r� r� re r� r� r� �propertyr� r� r� r� r� r� r� r rd r2 r� rv r� r r r r r r0 r r r
r r r� rc r� r r r r r s^
c @ s e Zd ZdZeZf ZdS )r z�PurePath subclass for non-Windows systems.
On a POSIX system, instantiating a PurePath should return this object.
However, you can also instantiate it directly on any system.
N)r: r; r< r= �_posix_flavourr� r� r r r r r u s c @ s e Zd ZdZeZf ZdS )r z�PurePath subclass for Windows systems.
On a Windows system, instantiating a PurePath should return this object.
However, you can also instantiate it directly on any system.
N)r: r; r< r= �_windows_flavourr� r� r r r r r s c @ s� e Zd ZdZdaZdd� Zdbdd�Zd d
� Zd d � Zd
d� Z dd� Z
dcdd�Z dddd�Z e
dd� �Ze
dd� �Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zded&d'�Zd(d)� Zd*d+� Zd,d-� Zdgd0d1�Zd2d3� Zdhd4d5�Zd6d7� Z did8d9�Z djd;d<�Z dkd=d>�Z d?d@� Z dAdB� Z!dCdD� Z"dEdF� Z#dGdH� Z$dIdJ� Z%dKdL� Z&dldMdN�Z'dOdP� Z(dQdR� Z)dSdT� Z*dUdV� Z+dWdX� Z,dYdZ� Z-d[d\� Z.d]d^� Z/d_d`� Z0dS )mr a� PurePath subclass that can make system calls.
Path represents a filesystem path but unlike PurePath, also offers
methods to do system calls on path objects. Depending on your system,
instantiating a Path will return either a PosixPath or a WindowsPath
object. You can also instantiate a PosixPath or WindowsPath directly,
but cannot instantiate a WindowsPath on a POSIX system or vice versa.
r� �_closedc O sL | t krtjdkrtnt} | j|dd�}|jjs@td| j f ��|j
� |S )NrA F)r� z$cannot instantiate %r on your system) r rl rv r r r� r� rw r� r: r� )r� r� �kwargsr# r r r r� � s z Path.__new__Nc C s" d| _ |d k r|j| _nt| _d S )NF)r r� �_normal_accessor)r# �templater r r r� � s
z
Path._initc C s | j |g }| j| j| j|�S )N)r� r� r� r� )r# r4 r0 r r r r� � s zPath._make_child_relpathc C s | j r| j� | S )N)r �
_raise_closed)r# r r r � __enter__� s zPath.__enter__c C s
d| _ d S )NT)r )r# �t�v�tbr r r �__exit__� s z
Path.__exit__c C s t d��d S )Nz I/O operation on closed path)r� )r# r r r r � s zPath._raise_closed� c C s | j j| ||�S )N)r� r� )r# rv �flagsr� r r r �_opener� s z Path._opener� c C s | j r| j� | jj| ||�S )zm
Open the file pointed by this path and return a file descriptor,
as os.open() does.
)r r r� r� )r# r r� r r r � _raw_open� s zPath._raw_openc C s | t j� �S )zjReturn a new path pointing to the current working directory
(as returned by os.getcwd()).
)rl r� )r� r r r �cwd� s zPath.cwdc C s | | � j jd��S )zrReturn a new path pointing to the user's home directory (as
returned by os.path.expanduser('~')).
N)r� rr )r� r r r �home� s z Path.homec C sB | j � }y |j � }W n tk
r2 tj |�}Y nX tjj||�S )zoReturn whether other_path is the same or not as this file
(as returned by os.path.samefile()).
)r� r� rl rh �samestat)r# Z
other_path�stZother_str r r �samefile� s z
Path.samefilec c sL | j r| j� x8| jj| �D ](}|dkr*q | j|�V | j r | j� q W dS )zyIterate over the files in this directory. Does not yield any
result for the special paths '.' and '..'.
r& �..N> r& r' )r r r� r� r� )r# rv r r r �iterdir� s z Path.iterdirc c sl |st dj|���| jj|�}| jj|f�\}}}|s:|rBtd��tt|��}x|j| �D ]
}|V qZW dS )z�Iterate over this subtree and yield all existing files (of any
kind, including directories) matching the given pattern.
zUnacceptable pattern: {!r}z%Non-relative patterns are unsupportedN) r� r� r� r8 r6 r� r� r� r� )r# �patternr1 r2 r� �selectorr[ r r r �glob� s z Path.globc c s^ | j j|�}| j j|f�\}}}|s(|r0td��tdt|� �}x|j| �D ]
}|V qLW dS )z�Recursively yield all existing files (of any kind, including
directories) matching the given pattern, anywhere in this subtree.
z%Non-relative patterns are unsupported�**N)r, )r� r8 r6 r� r� r� r� )r# r) r1 r2 r� r* r[ r r r �rglob s z
Path.rglobc C sD | j r| j� | j� r| S | jtj� g| j dd�}|j| d� |S )a Return an absolute version of this path. This function works
even if the path doesn't point to anything.
No normalization is done, i.e. all '.' and '..' will be kept along.
Use resolve() to get the canonical path to a file.
F)r� )r )r r r� r� rl r� r� r� )r# �objr r r �absolute s z
Path.absoluteFc C s� | j r| j� dd� }y| jj| |d�}W n, tk
rV } z||� � W Y dd}~X nX | j|f�}|s�y |j� W n* tk
r� } z||� W Y dd}~X nX |S )z�
Make the path absolute, resolving all symlinks on the way and also
normalizing it (for example turning slashes into backslashes under
Windows).
c S s0 t | dd�}| jtks |tkr,td| j ��d S )N�winerrorr zSymlink loop from %r)�getattr�errnor � _WINERROR_CANT_RESOLVE_FILENAMEro �filename)�er0 r r r � check_eloop* s z!Path.resolve.<locals>.check_eloop)�strictN)r r r� r� �OSErrorr� r� )r# r7 r6 rZ r5 r[ r r r �resolve! s z Path.resolvec C s | j j| �S )zh
Return the result of the stat() system call on this path, like
os.stat() does.
)r� r� )r# r r r r� ? s z Path.statc C s ddl }|j| j� j�jS )z:
Return the login name of the file owner.
r N)r} r~ r� �st_uidZpw_name)r# r} r r r �ownerF s z
Path.ownerc C s ddl }|j| j� j�jS )z8
Return the group name of the file gid.
r N)�grpZgetgrgidr� �st_gidZgr_name)r# r< r r r �groupM s z
Path.group�rr7 c C s, | j r| j� tjt| �|||||| jd�S )z|
Open the file pointed by this path and return a file object, as
the built-in open() function does.
)�opener)r r �ior� r� r )r# r� � buffering�encoding�errors�newliner r r r� T s z Path.openc C s | j dd��
}|j� S Q R X dS )zK
Open the file in bytes mode, read it, and close the file.
�rb)r� N)r� �read)r# r� r r r �
read_bytes_ s zPath.read_bytesc C s$ | j d||d��
}|j� S Q R X dS )zJ
Open the file in text mode, read it, and close the file.
r? )r� rC rD N)r� rG )r# rC rD r� r r r � read_textf s zPath.read_textc C s* t |�}| jdd�� }|j|�S Q R X dS )zO
Open the file in bytes mode, write to it, and close the file.
�wb)r� N)�
memoryviewr� �write)r# �dataZviewr� r r r � write_bytesm s zPath.write_bytesc C s@ t |t�std|jj ��| jd||d�� }|j|�S Q R X dS )zN
Open the file in text mode, write to it, and close the file.
zdata must be str, not %s�w)r� rC rD N)r� r� r� r� r: r� rL )r# rM rC rD r� r r r �
write_textv s
zPath.write_textTc C sr | j r| j� |r>y| jj| d� W n tk
r8 Y nX dS tjtjB }|sX|tjO }| j ||�}tj
|� dS )zS
Create this file with the given access mode, if it doesn't exist.
N) r r r� r� r8 rl �O_CREAT�O_WRONLY�O_EXCLr! �close)r# r� �exist_okr �fdr r r �touch� s
z
Path.touchc C s� | j r| j� y| jj| |� W nj tk
rf | s@| j| krB� | jjddd� | j|d|d� Y n& tk
r� | s�| j� r�� Y nX dS )z<
Create a new directory at this given path.
T)r rU FN)r r r� r� �FileNotFoundErrorr r8 r� )r# r� r rU r r r r� � s z
Path.mkdirc C s | j r| j� | jj| |� dS )zF
Change the permissions of the path, like os.chmod().
N)r r r� r� )r# r� r r r r� � s z
Path.chmodc C s | j r| j� | jj| |� dS )z�
Like chmod(), except if the path points to a symlink, the symlink's
permissions are changed, rather than its target's.
N)r r r� r� )r# r� r r r r� � s z Path.lchmodc C s | j r| j� | jj| � dS )zd
Remove this file or link.
If the path is a directory, use rmdir() instead.
N)r r r� r� )r# r r r r� � s z Path.unlinkc C s | j r| j� | jj| � dS )zF
Remove this directory. The directory must be empty.
N)r r r� r� )r# r r r r� � s z
Path.rmdirc C s | j r| j� | jj| �S )z�
Like stat(), except if the path points to a symlink, the symlink's
status information is returned, rather than its target's.
)r r r� r� )r# r r r r� � s z
Path.lstatc C s | j r| j� | jj| |� dS )z5
Rename this path to the given path.
N)r r r� r� )r# �targetr r r r� � s z Path.renamec C s | j r| j� | jj| |� dS )zo
Rename this path to the given path, clobbering the existing
destination if it exists.
N)r r r� r) )r# rY r r r r) � s z Path.replacec C s" | j r| j� | jj|| |� dS )z�
Make this path a symlink pointing to the given path.
Note the order of arguments (self, target) is the reverse of os.symlink's.
N)r r r� r� )r# rY r� r r r �
symlink_to� s zPath.symlink_toc C sB y | j � W n0 tk
r< } z|jttfkr.� dS d}~X nX dS )z+
Whether this path exists.
FNT)r� r8 r2 r r )r# r5 r r r r� � s z Path.existsc C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )z3
Whether this path is a directory.
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. sunau.cpython-36.opt-1.pyc 0000644 00000041054 15033571514 0011274 0 ustar 00 3
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An audio file consists of a header followed by the data. The structure
of the header is as follows.
+---------------+
| magic word |
+---------------+
| header size |
+---------------+
| data size |
+---------------+
| encoding |
+---------------+
| sample rate |
+---------------+
| # of channels |
+---------------+
| info |
| |
+---------------+
The magic word consists of the 4 characters '.snd'. Apart from the
info field, all header fields are 4 bytes in size. They are all
32-bit unsigned integers encoded in big-endian byte order.
The header size really gives the start of the data.
The data size is the physical size of the data. From the other
parameters the number of frames can be calculated.
The encoding gives the way in which audio samples are encoded.
Possible values are listed below.
The info field currently consists of an ASCII string giving a
human-readable description of the audio file. The info field is
padded with NUL bytes to the header size.
Usage.
Reading audio files:
f = sunau.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' or 'ULAW')
getcompname() -- returns human-readable version of
compression type ('not compressed' matches 'NONE')
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
is destroyed.
Writing audio files:
f = sunau.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)-- set all parameters at once
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
The close() method is called automatically when the class instance
is destroyed.
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Copyright (c) 1999-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com
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This module provides regular expression matching operations similar to
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characters outside the US ASCII range.
Regular expressions can contain both special and ordinary characters.
Most ordinary characters, like "A", "a", or "0", are the simplest
regular expressions; they simply match themselves. You can
concatenate ordinary characters, so last matches the string 'last'.
The special characters are:
"." Matches any character except a newline.
"^" Matches the start of the string.
"$" Matches the end of the string or just before the newline at
the end of the string.
"*" Matches 0 or more (greedy) repetitions of the preceding RE.
Greedy means that it will match as many repetitions as possible.
"+" Matches 1 or more (greedy) repetitions of the preceding RE.
"?" Matches 0 or 1 (greedy) of the preceding RE.
*?,+?,?? Non-greedy versions of the previous three special characters.
{m,n} Matches from m to n repetitions of the preceding RE.
{m,n}? Non-greedy version of the above.
"\\" Either escapes special characters or signals a special sequence.
[] Indicates a set of characters.
A "^" as the first character indicates a complementing set.
"|" A|B, creates an RE that will match either A or B.
(...) Matches the RE inside the parentheses.
The contents can be retrieved or matched later in the string.
(?aiLmsux) Set the A, I, L, M, S, U, or X flag for the RE (see below).
(?:...) Non-grouping version of regular parentheses.
(?P<name>...) The substring matched by the group is accessible by name.
(?P=name) Matches the text matched earlier by the group named name.
(?#...) A comment; ignored.
(?=...) Matches if ... matches next, but doesn't consume the string.
(?!...) Matches if ... doesn't match next.
(?<=...) Matches if preceded by ... (must be fixed length).
(?<!...) Matches if not preceded by ... (must be fixed length).
(?(id/name)yes|no) Matches yes pattern if the group with id/name matched,
the (optional) no pattern otherwise.
The special sequences consist of "\\" and a character from the list
below. If the ordinary character is not on the list, then the
resulting RE will match the second character.
\number Matches the contents of the group of the same number.
\A Matches only at the start of the string.
\Z Matches only at the end of the string.
\b Matches the empty string, but only at the start or end of a word.
\B Matches the empty string, but not at the start or end of a word.
\d Matches any decimal digit; equivalent to the set [0-9] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode digits.
\D Matches any non-digit character; equivalent to [^\d].
\s Matches any whitespace character; equivalent to [ \t\n\r\f\v] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode whitespace characters.
\S Matches any non-whitespace character; equivalent to [^\s].
\w Matches any alphanumeric character; equivalent to [a-zA-Z0-9_]
in bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the
range of Unicode alphanumeric characters (letters plus digits
plus underscore).
With LOCALE, it will match the set [0-9_] plus characters defined
as letters for the current locale.
\W Matches the complement of \w.
\\ Matches a literal backslash.
This module exports the following functions:
match Match a regular expression pattern to the beginning of a string.
fullmatch Match a regular expression pattern to all of a string.
search Search a string for the presence of a pattern.
sub Substitute occurrences of a pattern found in a string.
subn Same as sub, but also return the number of substitutions made.
split Split a string by the occurrences of a pattern.
findall Find all occurrences of a pattern in a string.
finditer Return an iterator yielding a match object for each match.
compile Compile a pattern into a RegexObject.
purge Clear the regular expression cache.
escape Backslash all non-alphanumerics in a string.
Some of the functions in this module takes flags as optional parameters:
A ASCII For string patterns, make \w, \W, \b, \B, \d, \D
match the corresponding ASCII character categories
(rather than the whole Unicode categories, which is the
default).
For bytes patterns, this flag is the only available
behaviour and needn't be specified.
I IGNORECASE Perform case-insensitive matching.
L LOCALE Make \w, \W, \b, \B, dependent on the current locale.
M MULTILINE "^" matches the beginning of lines (after a newline)
as well as the string.
"$" matches the end of lines (before a newline) as well
as the end of the string.
S DOTALL "." matches any character at all, including the newline.
X VERBOSE Ignore whitespace and comments for nicer looking RE's.
U UNICODE For compatibility only. Ignored for string patterns (it
is the default), and forbidden for bytes patterns.
This module also defines an exception 'error'.
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The big change from the previous Profiler (in terms of raw functionality)
is that an "add()" method has been provided to combine Stats from
several distinct profile runs. Both the constructor and the add()
method now take arbitrarily many file names as arguments.
All the print methods now take an argument that indicates how many lines
to print. If the arg is a floating point number between 0 and 1.0, then
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(e.g., .1 means print 10% of all available lines). If it is an integer,
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of quoted strings to select the sort order.
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function time', and on the minor key of 'the name of the function'. Look at
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examples.
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do_calleesN s zProfileBrowser.do_calleesc C s t d| jd� | j� d S )Nz6Print callees statistics from the current stat object.)r )r" r r� )r r r r � help_calleesP s zProfileBrowser.help_calleesc C s | j d|�S )Nr� )r� )r rV r r r �
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r� w�Y nX e%e#d �r�e#j&ZP q�W [ej d k�r@eej'� j(j)d!�d �d"k�r@dZy ej*j+Z#W n dZ#Y nX e,e#d#e,e#d$d��ZW n Y nX d%d&� Z-d'd(� Z.d)d*� Z/da0e.eegZ1e-eeeeegZ2d+d,� Z3da4d9d-d.�Z5d/d0� Z6d1d2� Z7d3d4� Z8e d5�Z9e d6�Z:e d7�Z;e d8�Z<dS ):aQ UUID objects (universally unique identifiers) according to RFC 4122.
This module provides immutable UUID objects (class UUID) and the functions
uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5
UUIDs as specified in RFC 4122.
If all you want is a unique ID, you should probably call uuid1() or uuid4().
Note that uuid1() may compromise privacy since it creates a UUID containing
the computer's network address. uuid4() creates a random UUID.
Typical usage:
>>> import uuid
# make a UUID based on the host ID and current time
>>> uuid.uuid1() # doctest: +SKIP
UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
# make a UUID using an MD5 hash of a namespace UUID and a name
>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')
# make a random UUID
>>> uuid.uuid4() # doctest: +SKIP
UUID('16fd2706-8baf-433b-82eb-8c7fada847da')
# make a UUID using a SHA-1 hash of a namespace UUID and a name
>>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')
# make a UUID from a string of hex digits (braces and hyphens ignored)
>>> x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
# convert a UUID to a string of hex digits in standard form
>>> str(x)
'00010203-0405-0607-0809-0a0b0c0d0e0f'
# get the raw 16 bytes of the UUID
>>> x.bytes
b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
# make a UUID from a 16-byte string
>>> uuid.UUID(bytes=x.bytes)
UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')
� NzKa-Ping Yee <ping@zesty.ca>z reserved for NCS compatibilityzspecified in RFC 4122z$reserved for Microsoft compatibilityz reserved for future definitionc @ s e Zd ZdZd7dd�Zdd� Zdd� Zd d
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UUID objects are immutable, hashable, and usable as dictionary keys.
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five possible forms: a similar string of hexadecimal digits, or a tuple
of six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
48-bit values respectively) as an argument named 'fields', or a string
of 16 bytes (with all the integer fields in big-endian order) as an
argument named 'bytes', or a string of 16 bytes (with the first three
fields in little-endian order) as an argument named 'bytes_le', or a
single 128-bit integer as an argument named 'int'.
UUIDs have these read-only attributes:
bytes the UUID as a 16-byte string (containing the six
integer fields in big-endian byte order)
bytes_le the UUID as a 16-byte string (with time_low, time_mid,
and time_hi_version in little-endian byte order)
fields a tuple of the six integer fields of the UUID,
which are also available as six individual attributes
and two derived attributes:
time_low the first 32 bits of the UUID
time_mid the next 16 bits of the UUID
time_hi_version the next 16 bits of the UUID
clock_seq_hi_variant the next 8 bits of the UUID
clock_seq_low the next 8 bits of the UUID
node the last 48 bits of the UUID
time the 60-bit timestamp
clock_seq the 14-bit sequence number
hex the UUID as a 32-character hexadecimal string
int the UUID as a 128-bit integer
urn the UUID as a URN as specified in RFC 4122
variant the UUID variant (one of the constants RESERVED_NCS,
RFC_4122, RESERVED_MICROSOFT, or RESERVED_FUTURE)
version the UUID version number (1 through 5, meaningful only
when the variant is RFC_4122)
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8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as
the 'fields' argument, or a single 128-bit integer as the 'int'
argument. When a string of hex digits is given, curly braces,
hyphens, and a URN prefix are all optional. For example, these
expressions all yield the same UUID:
UUID('{12345678-1234-5678-1234-567812345678}')
UUID('12345678123456781234567812345678')
UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
UUID(bytes='\x12\x34\x56\x78'*4)
UUID(bytes_le='\x78\x56\x34\x12\x34\x12\x78\x56' +
'\x12\x34\x56\x78\x12\x34\x56\x78')
UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
UUID(int=0x12345678123456781234567812345678)
Exactly one of 'hex', 'bytes', 'bytes_le', 'fields', or 'int' must
be given. The 'version' argument is optional; if given, the resulting
UUID will have its variant and version set according to RFC 4122,
overriding the given 'hex', 'bytes', 'bytes_le', 'fields', or 'int'.
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^ sunau.cpython-36.pyc 0000644 00000041054 15033571514 0010335 0 ustar 00 3
\�F � @ s� d Z ddlmZ edd�ZdZdZdZdZd Zd
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An audio file consists of a header followed by the data. The structure
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+---------------+
| magic word |
+---------------+
| header size |
+---------------+
| data size |
+---------------+
| encoding |
+---------------+
| sample rate |
+---------------+
| # of channels |
+---------------+
| info |
| |
+---------------+
The magic word consists of the 4 characters '.snd'. Apart from the
info field, all header fields are 4 bytes in size. They are all
32-bit unsigned integers encoded in big-endian byte order.
The header size really gives the start of the data.
The data size is the physical size of the data. From the other
parameters the number of frames can be calculated.
The encoding gives the way in which audio samples are encoded.
Possible values are listed below.
The info field currently consists of an ASCII string giving a
human-readable description of the audio file. The info field is
padded with NUL bytes to the header size.
Usage.
Reading audio files:
f = sunau.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' or 'ULAW')
getcompname() -- returns human-readable version of
compression type ('not compressed' matches 'NONE')
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
is destroyed.
Writing audio files:
f = sunau.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)-- set all parameters at once
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
The close() method is called automatically when the class instance
is destroyed.
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\�� � @ s� d Z dZdddddddd d
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By Greg Ward <gward@python.net>
Originally distributed as Optik.
For support, use the optik-users@lists.sourceforge.net mailing list
(http://lists.sourceforge.net/lists/listinfo/optik-users).
Simple usage example:
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="write report to FILE", metavar="FILE")
parser.add_option("-q", "--quiet",
action="store_false", dest="verbose", default=True,
help="don't print status messages to stdout")
(options, args) = parser.parse_args()
z1.5.3�Option� make_option�
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OptParseError� OptionError�OptionConflictError�OptionValueError�BadOptionError� check_choicea"
Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved.
Copyright (c) 2002-2006 Python Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
� Nc C s d| j jt| �| f S )Nz<%s at 0x%x: %s>)� __class__�__name__�id)�self� r � /usr/lib64/python3.6/optparse.py�_reprO s r )�gettext�ngettextc C s | S )Nr )�messager r r r \ s r c C s |dkr | S |S )N� r )ZsingularZplural�nr r r r _ s r c @ s e Zd Zdd� Zdd� ZdS )r c C s
|| _ d S )N)�msg)r r r r r �__init__h s zOptParseError.__init__c C s | j S )N)r )r r r r �__str__k s zOptParseError.__str__N)r �
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Raised if an Option instance is created with invalid or
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Abstract base class for formatting option help. OptionParser
instances should use one of the HelpFormatter subclasses for
formatting help; by default IndentedHelpFormatter is used.
Instance attributes:
parser : OptionParser
the controlling OptionParser instance
indent_increment : int
the number of columns to indent per nesting level
max_help_position : int
the maximum starting column for option help text
help_position : int
the calculated starting column for option help text;
initially the same as the maximum
width : int
total number of columns for output (pass None to constructor for
this value to be taken from the $COLUMNS environment variable)
level : int
current indentation level
current_indent : int
current indentation level (in columns)
help_width : int
number of columns available for option help text (calculated)
default_tag : str
text to replace with each option's default value, "%default"
by default. Set to false value to disable default value expansion.
option_strings : { Option : str }
maps Option instances to the snippet of help text explaining
the syntax of that option, e.g. "-h, --help" or
"-fFILE, --file=FILE"
_short_opt_fmt : str
format string controlling how short options with values are
printed in help text. Must be either "%s%s" ("-fFILE") or
"%s %s" ("-f FILE"), because those are the two syntaxes that
Optik supports.
_long_opt_fmt : str
similar but for long options; must be either "%s %s" ("--file FILE")
or "%s=%s" ("--file=FILE").
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Instance attributes:
_short_opts : [string]
_long_opts : [string]
action : string
type : string
dest : string
default : any
nargs : int
const : any
choices : [string]
callback : function
callback_args : (any*)
callback_kwargs : { string : any }
help : string
metavar : string
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CHECK_METHODS)r rl �attrs�checkerr r r r 4 s
zOption.__init__c C s dd� |D �}|st d��|S )Nc S s g | ] }|r|�qS r r )rd rq r r r rf K s z-Option._check_opt_strings.<locals>.<listcomp>z+at least one option string must be supplied)� TypeError)r rl r r r r� G s zOption._check_opt_stringsc C s� x�|D ]�}t |�dk r&td| | ��qt |�dkrf|d dkoH|d dksXtd| | ��| jj|� q|dd� dko�|d dks�td| | ��| jj|� qW d S ) Nr. z>invalid option string %r: must be at least two characters longr �-r zMinvalid short option string %r: must be of the form -x, (x any non-dash char)z--zGinvalid long option string %r: must start with --, followed by non-dash)rh r
rw ri rx )r rl rq r r r r� P s$
zOption._set_opt_stringsc C sz xP| j D ]F}||kr,t| ||| � ||= q|dkrBt| |t� qt| |d � qW |rvt|j� �}tddj|� | ��d S )Nr� z invalid keyword arguments: %sz, )�ATTRS�setattrr` �sorted�keysr
r, )r r� �attrr r r r� e s zOption._set_attrsc C s2 | j d krd| _ n | j | jkr.td| j | ��d S )Nr� zinvalid action: %r)r� �ACTIONSr
)r r r r �
_check_actionx s
zOption._check_actionc C s� | j d kr0| j| jkr�| jd k r(d| _ q�d| _ n^t| j t �rF| j j| _ | j dkrVd| _ | j | jkrrtd| j | ��| j| jkr�td| j | ��d S )Nr� r� r$ zinvalid option type: %rz$must not supply a type for action %r) r� r� �ALWAYS_TYPED_ACTIONSr� �
isinstancer �TYPESr
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r� �tuple�listr$ �split)r r r r �
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STORE_ACTIONSr� r_ rx rb rw )r ru r r r � _check_dest� s
zOption._check_destc C s* | j | jkr&| jd k r&td| j | ��d S )Nz*'const' must not be supplied for action %r)r� �
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)r r r r � _check_const� s zOption._check_constc C s< | j | jkr | jd kr8d| _n| jd k r8td| j | ��d S )Nr z*'nargs' must not be supplied for action %r)r� r� r� r
)r r r r � _check_nargs� s
zOption._check_nargsc C s� | j dkrvt| j�s$td| j | ��| jd k rLt| jt� rLtd| j | ��| jd k r�t| jt� r�td| j | ��nB| jd k r�td| j | ��| jd k r�td| ��| jd k r�td| ��d S )Nr� zcallback not callable: %rz3callback_args, if supplied, must be a tuple: not %rz4callback_kwargs, if supplied, must be a dict: not %rz.callback supplied (%r) for non-callback optionz.callback_args supplied for non-callback optionz0callback_kwargs supplied for non-callback option) r� �callabler� r
r� r� r� r� �dict)r r r r �_check_callback� s0
zOption._check_callbackc C s dj | j| j �S )N�/)r, rw rx )r r r r r! � s zOption.__str__c C s
| j d k S )N)r� )r r r r ru � s zOption.takes_valuec C s | j r| j d S | jd S d S )Nr )rx rw )r r r r �get_opt_string� s
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t | j�S )N)r$ �__dict__)r r r r r! > s zValues.__str__c C s2 t |t�r| j|jkS t |t�r*| j|kS tS d S )N)r� r r� r� �NotImplemented)r �otherr r r �__eq__C s
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Values.__eq__c C s: x4t | �D ](}||kr
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Update the option values from an arbitrary dictionary, but only
use keys from dict that already have a corresponding attribute
in self. Any keys in dict without a corresponding attribute
are silently ignored.
N)�dirr� )r r� r� Zdvalr r r �_update_carefulK s
zValues._update_carefulc C s | j j|� dS )z�
Update the option values from an arbitrary dictionary,
using all keys from the dictionary regardless of whether
they have a corresponding attribute in self or not.
N)r� �update)r r� r r r �
_update_looseX s zValues._update_loosec C s8 |dkr| j |� n |dkr(| j|� n td| ��d S )N�carefulZloosezinvalid update mode: %r)r� r� r6 )r r� �moder r r �_update` s
zValues._updater� c C s& t |� tj| }| jt|�|� d S )N)�
__import__�sys�modulesr� �vars)r �modnamer� �modr r r � read_moduleh s
zValues.read_modulec C s& i }t t|�j� |� | j||� d S )N)�exec�open�readr� )r �filenamer� r� r r r � read_filem s zValues.read_filec C s0 t | |� st| |�d kr&t| ||� t| |�S )N)�hasattr�getattrr� )r r� r� r r r r� r s zValues.ensure_value)N)r� )r� )r r" r# r r! r r� r� r� r� r� r� r� r� r r r r r 7 s
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Abstract base class.
Class attributes:
standard_option_list : [Option]
list of standard options that will be accepted by all instances
of this parser class (intended to be overridden by subclasses).
Instance attributes:
option_list : [Option]
the list of Option objects contained by this OptionContainer
_short_opt : { string : Option }
dictionary mapping short option strings, eg. "-f" or "-X",
to the Option instances that implement them. If an Option
has multiple short option strings, it will appear in this
dictionary multiple times. [1]
_long_opt : { string : Option }
dictionary mapping long option strings, eg. "--file" or
"--exclude", to the Option instances that implement them.
Again, a given Option can occur multiple times in this
dictionary. [1]
defaults : { string : any }
dictionary mapping option destination names to default
values for each destination [1]
[1] These mappings are common to (shared by) all components of the
controlling OptionParser, where they are initially created.
c C s& | j � || _| j|� | j|� d S )N)�_create_option_list� option_class�set_conflict_handler�set_description)r r� �conflict_handlerrX r r r r � s
zOptionContainer.__init__c C s i | _ i | _i | _d S )N)�
_short_opt� _long_optr] )r r r r �_create_option_mappings� s z'OptionContainer._create_option_mappingsc C s |j | _ |j| _|j| _d S )N)r� r� r] )r r0 r r r �_share_option_mappings� s z&OptionContainer._share_option_mappingsc C s |dkrt d| ��|| _d S )N�error�resolvez$invalid conflict_resolution value %r)r� r� )r6 r� )r �handlerr r r r� � s z$OptionContainer.set_conflict_handlerc C s
|| _ d S )N)rX )r rX r r r r� � s z OptionContainer.set_descriptionc C s | j S )N)rX )r r r r �get_description� s z OptionContainer.get_descriptionc C s | ` | `| `dS )zsee OptionParser.destroy().N)r� r� r] )r r r r �destroy� s zOptionContainer.destroyc C s� g }x,|j D ]"}|| jkr |j|| j| f� q W x,|jD ]"}|| jkr:|j|| j| f� q:W |r�| j}|dkr�tddjdd� |D �� |��nh|dkr�x^|D ]V\}}|jd�r�|jj |� | j|= n|j j |� | j|= |j p�|js�|j
j j |� q�W d S )Nr� z conflicting option string(s): %sz, c S s g | ] }|d �qS )r r )rd �cor r r rf � s z3OptionContainer._check_conflict.<locals>.<listcomp>r� z--) rw r� ri rx r� r� r r, �
startswith�remove� containerrn )r r& Z
conflict_optsrq r� Zc_optionr r r �_check_conflict� s.
z OptionContainer._check_conflictc O s� t |d t�r | j||�}n:t|�dkrN| rN|d }t |t�sVtd| ��ntd��| j|� | jj|� | |_ x|j
D ]}|| j |< qzW x|j D ]}|| j
|< q�W |jdk r�|jtk r�|j| j|j< n|j| jkr�d| j|j< |S )zOadd_option(Option)
add_option(opt_str, ..., kwarg=val, ...)
r r znot an Option instance: %rzinvalid argumentsN)r� r$ r� rh r r� r� rn ri r� rw r� rx r� r_ r� r` r] )r r� r� r& rq r r r �
add_option� s(
zOptionContainer.add_optionc C s x|D ]}| j |� qW d S )N)r� )r rn r& r r r � add_options s
zOptionContainer.add_optionsc C s | j j|�p| jj|�S )N)r� r^ r� )r r( r r r �
get_option s zOptionContainer.get_optionc C s || j kp|| jkS )N)r� r� )r r( r r r �
has_option s
zOptionContainer.has_optionc C sv | j j|�}|d kr | jj|�}|d kr4td| ��x|jD ] }| j |= q<W x|jD ] }| j|= qTW |jjj|� d S )Nzno such option %r) r� r^ r� r6 rw rx r� rn r� )r r( r& rq r r r �
remove_option s z OptionContainer.remove_optionc C sB | j s
dS g }x(| j D ] }|jtk r|j|j|�� qW dj|�S )NrE )rn r\ r ri rm r, )r � formatterrk r& r r r �format_option_help s
z"OptionContainer.format_option_helpc C s |j | j� �S )N)rY r� )r r r r r rY ( s z"OptionContainer.format_descriptionc C s: g }| j r|j| j|�� | jr0|j| j|�� dj|�S )NrW )rX ri rY rn r r, )r r rk r r r � format_help+ s zOptionContainer.format_helpN)r r" r# r' r r� r� r� r� r� r� r� r� r� r� r r r rY r r r r r r x s" c @ s6 e Zd Zd dd�Zdd� Zdd� Zdd � Zd
d � ZdS )
r Nc C s$ || _ tj| |j|j|� || _d S )N)r0 r r r� r� �title)r r0 r rX r r r r 6 s zOptionGroup.__init__c C s g | _ | j| j� d S )N)rn r� r0 )r r r r r� < s z OptionGroup._create_option_listc C s
|| _ d S )N)r )r r r r r � set_title@ s zOptionGroup.set_titlec C s t j| � | `dS )zsee OptionParser.destroy().N)r r� rn )r r r r r� C s
zOptionGroup.destroyc C s0 |j | j�}|j� |tj| |�7 }|j� |S )N)rR r rK r r rM )r r rk r r r r J s
zOptionGroup.format_help)N)r r" r# r r� r r� r r r r r r 4 s
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dd� Zdd� Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� ZdQd)d*�Zd+d,� Zd-d.� Zd/d0� Zd1d2� Z d3d4� Z d5d6� Z d7d8� Z d9d:� Z dRd<d=�Z!d>d?� Z"d@dA� Z#dSdBdC�Z$dDdE� Z%dTdFdG�Z&dUdHdI�Z'dJdK� Z(dVdLdM�Z)dWdNdO�Z*dS )Xr a$
Class attributes:
standard_option_list : [Option]
list of standard options that will be accepted by all instances
of this parser class (intended to be overridden by subclasses).
Instance attributes:
usage : string
a usage string for your program. Before it is displayed
to the user, "%prog" will be expanded to the name of
your program (self.prog or os.path.basename(sys.argv[0])).
prog : string
the name of the current program (to override
os.path.basename(sys.argv[0])).
description : string
A paragraph of text giving a brief overview of your program.
optparse reformats this paragraph to fit the current terminal
width and prints it when the user requests help (after usage,
but before the list of options).
epilog : string
paragraph of help text to print after option help
option_groups : [OptionGroup]
list of option groups in this parser (option groups are
irrelevant for parsing the command-line, but very useful
for generating help)
allow_interspersed_args : bool = true
if true, positional arguments may be interspersed with options.
Assuming -a and -b each take a single argument, the command-line
-ablah foo bar -bboo baz
will be interpreted the same as
-ablah -bboo -- foo bar baz
If this flag were false, that command line would be interpreted as
-ablah -- foo bar -bboo baz
-- ie. we stop processing options as soon as we see the first
non-option argument. (This is the tradition followed by
Python's getopt module, Perl's Getopt::Std, and other argument-
parsing libraries, but it is generally annoying to users.)
process_default_values : bool = true
if true, option default values are processed similarly to option
values from the command line: that is, they are passed to the
type-checking function for the option's type (as long as the
default value is a string). (This really only matters if you
have defined custom types; see SF bug #955889.) Set it to false
to restore the behaviour of Optik 1.4.1 and earlier.
rargs : [string]
the argument list currently being parsed. Only set when
parse_args() is active, and continually trimmed down as
we consume arguments. Mainly there for the benefit of
callback options.
largs : [string]
the list of leftover arguments that we have skipped while
parsing options. If allow_interspersed_args is false, this
list is always empty.
values : Values
the set of option values currently being accumulated. Only
set when parse_args() is active. Also mainly for callbacks.
Because of the 'rargs', 'largs', and 'values' attributes,
OptionParser is not thread-safe. If, for some perverse reason, you
need to parse command-line arguments simultaneously in different
threads, use different OptionParser instances.
Nr� Tc C sr t j| |||� | j|� | | _|| _d| _d| _|d kr@t� }|| _| jj | � |
| _
| j ||d� | j � d S )NT)�add_help)
r r � set_usage�progr� �allow_interspersed_args�process_default_valuesr
r rD rZ �_populate_option_list�_init_parsing_state) r rO rn r� r� r� rX r Zadd_help_optionr rZ r r r r � s
zOptionParser.__init__c C s2 t j| � x| jD ] }|j� qW | `| `| `dS )a
Declare that you are done with this OptionParser. This cleans up
reference cycles so the OptionParser (and all objects referenced by
it) can be garbage-collected promptly. After calling destroy(), the
OptionParser is unusable.
N)r r� rp rn r )r rr r r r r� � s
zOptionParser.destroyc C s g | _ g | _| j� d S )N)rn rp r� )r r r r r� � s z OptionParser._create_option_listc C s | j dddtd�d� d S )Nz-hz--helpr\ z show this help message and exit)r� r\ )r� r) )r r r r �_add_help_option� s z OptionParser._add_help_optionc C s | j ddtd�d� d S )Nz --versionr� z&show program's version number and exit)r� r\ )r� r) )r r r r �_add_version_option� s z OptionParser._add_version_optionc C s> | j r| j| j � |r | j|� | jr.| j� |r:| j� d S )N)�standard_option_listr� r� r r )r rn r r r r r � s
z"OptionParser._populate_option_listc C s d | _ d | _d | _d S )N)�rargs�largsr� )r r r r r
� s z OptionParser._init_parsing_statec C sL |d krt d�| _n4|tkr$d | _n$|j� jd�rB|dd � | _n|| _d S )Nz%prog [options]zusage: � )r) rO r r~ r� )r rO r r r r � s zOptionParser.set_usagec C s
d| _ dS )a Set parsing to not stop on the first non-option, allowing
interspersing switches with command arguments. This is the
default behavior. See also disable_interspersed_args() and the
class documentation description of the attribute
allow_interspersed_args.TN)r
)r r r r �enable_interspersed_args� s z%OptionParser.enable_interspersed_argsc C s
d| _ dS )z�Set parsing to stop on the first non-option. Use this if
you have a command processor which runs another command that
has options of its own and you want to make sure these options
don't get confused.
FN)r
)r r r r �disable_interspersed_args s z&OptionParser.disable_interspersed_argsc C s
|| _ d S )N)r )r r� r r r �set_process_default_values s z'OptionParser.set_process_default_valuesc C s || j |< d S )N)r] )r r_ r� r r r � set_default s zOptionParser.set_defaultc K s | j j|� d S )N)r] r� )r r� r r r � set_defaults s zOptionParser.set_defaultsc C s. | j d d � }x| jD ]}|j|j � qW |S )N)rn rp rj )r Zoptionsrr r r r �_get_all_options s z OptionParser._get_all_optionsc C sd | j st| j�S | jj� }x@| j� D ]4}|j|j�}t|t�r$|j � }|j
||�||j< q$W t|�S )N) r r r] �copyr r^ r_ r� r$ r� r� )r r] r& r� r( r r r �get_default_values s
z OptionParser.get_default_valuesc O s| t |d t�r t| f|�|�}nLt|�dkrd| rd|d }t |t�sPtd| ��|j| k rltd��ntd��| jj|� |S )Nr r z not an OptionGroup instance: %rz"invalid OptionGroup (wrong parser)zinvalid arguments) r� r$ r rh r� r0 r6 rp ri )r r� r� rr r r r �add_option_group+ s
z OptionParser.add_option_groupc C s0 | j j|�p| jj|�}|r,|j| k r,|jS d S )N)r� r^ r� r� )r r( r& r r r �get_option_group; s
z OptionParser.get_option_groupc C s& |d krt jdd � S |d d � S d S )Nr )r� �argv)r r� r r r � _get_argsE s zOptionParser._get_argsc C s� | j |�}|dkr| j� }|| _g | _}|| _y| j|||�}W n4 ttfk
rv } z| jt |�� W Y dd}~X nX || }| j
||�S )aR
parse_args(args : [string] = sys.argv[1:],
values : Values = None)
-> (values : Values, args : [string])
Parse the command-line options found in 'args' (default:
sys.argv[1:]). Any errors result in a call to 'error()', which
by default prints the usage message to stderr and calls
sys.exit() with an error message. On success returns a pair
(values, args) where 'values' is a Values instance (with all
your option values) and 'args' is the list of arguments left
over after parsing options.
N) r r r r r� �
_process_argsr r r� r$ � check_values)r r� r� r r �stop�errr r r �
parse_argsK s
zOptionParser.parse_argsc C s ||fS )a�
check_values(values : Values, args : [string])
-> (values : Values, args : [string])
Check that the supplied option values and leftover arguments are
valid. Returns the option values and leftover arguments
(possibly adjusted, possibly completely new -- whatever you
like). Default implementation just returns the passed-in
values; subclasses may override as desired.
r )r r� r� r r r r! r s zOptionParser.check_valuesc C s� x�|r�|d }|dkr |d= dS |dd� dkr>| j ||� q|dd� dkrht|�dkrh| j||� q| jr�|j|� |d= qdS qW dS )a� _process_args(largs : [string],
rargs : [string],
values : Values)
Process command-line arguments and populate 'values', consuming
options and arguments from 'rargs'. If 'allow_interspersed_args' is
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Heaps are arrays for which a[k] <= a[2*k+1] and a[k] <= a[2*k+2] for
all k, counting elements from 0. For the sake of comparison,
non-existing elements are considered to be infinite. The interesting
property of a heap is that a[0] is always its smallest element.
Usage:
heap = [] # creates an empty heap
heappush(heap, item) # pushes a new item on the heap
item = heappop(heap) # pops the smallest item from the heap
item = heap[0] # smallest item on the heap without popping it
heapify(x) # transforms list into a heap, in-place, in linear time
item = heapreplace(heap, item) # pops and returns smallest item, and adds
# new item; the heap size is unchanged
Our API differs from textbook heap algorithms as follows:
- We use 0-based indexing. This makes the relationship between the
index for a node and the indexes for its children slightly less
obvious, but is more suitable since Python uses 0-based indexing.
- Our heappop() method returns the smallest item, not the largest.
These two make it possible to view the heap as a regular Python list
without surprises: heap[0] is the smallest item, and heap.sort()
maintains the heap invariant!
uo Heap queues
[explanation by François Pinard]
Heaps are arrays for which a[k] <= a[2*k+1] and a[k] <= a[2*k+2] for
all k, counting elements from 0. For the sake of comparison,
non-existing elements are considered to be infinite. The interesting
property of a heap is that a[0] is always its smallest element.
The strange invariant above is meant to be an efficient memory
representation for a tournament. The numbers below are `k', not a[k]:
0
1 2
3 4 5 6
7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
In the tree above, each cell `k' is topping `2*k+1' and `2*k+2'. In
a usual binary tournament we see in sports, each cell is the winner
over the two cells it tops, and we can trace the winner down the tree
to see all opponents s/he had. However, in many computer applications
of such tournaments, we do not need to trace the history of a winner.
To be more memory efficient, when a winner is promoted, we try to
replace it by something else at a lower level, and the rule becomes
that a cell and the two cells it tops contain three different items,
but the top cell "wins" over the two topped cells.
If this heap invariant is protected at all time, index 0 is clearly
the overall winner. The simplest algorithmic way to remove it and
find the "next" winner is to move some loser (let's say cell 30 in the
diagram above) into the 0 position, and then percolate this new 0 down
the tree, exchanging values, until the invariant is re-established.
This is clearly logarithmic on the total number of items in the tree.
By iterating over all items, you get an O(n ln n) sort.
A nice feature of this sort is that you can efficiently insert new
items while the sort is going on, provided that the inserted items are
not "better" than the last 0'th element you extracted. This is
especially useful in simulation contexts, where the tree holds all
incoming events, and the "win" condition means the smallest scheduled
time. When an event schedule other events for execution, they are
scheduled into the future, so they can easily go into the heap. So, a
heap is a good structure for implementing schedulers (this is what I
used for my MIDI sequencer :-).
Various structures for implementing schedulers have been extensively
studied, and heaps are good for this, as they are reasonably speedy,
the speed is almost constant, and the worst case is not much different
than the average case. However, there are other representations which
are more efficient overall, yet the worst cases might be terrible.
Heaps are also very useful in big disk sorts. You most probably all
know that a big sort implies producing "runs" (which are pre-sorted
sequences, which size is usually related to the amount of CPU memory),
followed by a merging passes for these runs, which merging is often
very cleverly organised[1]. It is very important that the initial
sort produces the longest runs possible. Tournaments are a good way
to that. If, using all the memory available to hold a tournament, you
replace and percolate items that happen to fit the current run, you'll
produce runs which are twice the size of the memory for random input,
and much better for input fuzzily ordered.
Moreover, if you output the 0'th item on disk and get an input which
may not fit in the current tournament (because the value "wins" over
the last output value), it cannot fit in the heap, so the size of the
heap decreases. The freed memory could be cleverly reused immediately
for progressively building a second heap, which grows at exactly the
same rate the first heap is melting. When the first heap completely
vanishes, you switch heaps and start a new run. Clever and quite
effective!
In a word, heaps are useful memory structures to know. I use them in
a few applications, and I think it is good to keep a `heap' module
around. :-)
--------------------
[1] The disk balancing algorithms which are current, nowadays, are
more annoying than clever, and this is a consequence of the seeking
capabilities of the disks. On devices which cannot seek, like big
tape drives, the story was quite different, and one had to be very
clever to ensure (far in advance) that each tape movement will be the
most effective possible (that is, will best participate at
"progressing" the merge). Some tapes were even able to read
backwards, and this was also used to avoid the rewinding time.
Believe me, real good tape sorts were quite spectacular to watch!
From all times, sorting has always been a Great Art! :-)
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The Python Debugger Pdb
=======================
To use the debugger in its simplest form:
>>> import pdb
>>> pdb.run('<a statement>')
The debugger's prompt is '(Pdb) '. This will stop in the first
function call in <a statement>.
Alternatively, if a statement terminated with an unhandled exception,
you can use pdb's post-mortem facility to inspect the contents of the
traceback:
>>> <a statement>
<exception traceback>
>>> import pdb
>>> pdb.pm()
The commands recognized by the debugger are listed in the next
section. Most can be abbreviated as indicated; e.g., h(elp) means
that 'help' can be typed as 'h' or 'help' (but not as 'he' or 'hel',
nor as 'H' or 'Help' or 'HELP'). Optional arguments are enclosed in
square brackets. Alternatives in the command syntax are separated
by a vertical bar (|).
A blank line repeats the previous command literally, except for
'list', where it lists the next 11 lines.
Commands that the debugger doesn't recognize are assumed to be Python
statements and are executed in the context of the program being
debugged. Python statements can also be prefixed with an exclamation
point ('!'). This is a powerful way to inspect the program being
debugged; it is even possible to change variables or call functions.
When an exception occurs in such a statement, the exception name is
printed but the debugger's state is not changed.
The debugger supports aliases, which can save typing. And aliases can
have parameters (see the alias help entry) which allows one a certain
level of adaptability to the context under examination.
Multiple commands may be entered on a single line, separated by the
pair ';;'. No intelligence is applied to separating the commands; the
input is split at the first ';;', even if it is in the middle of a
quoted string.
If a file ".pdbrc" exists in your home directory or in the current
directory, it is read in and executed as if it had been typed at the
debugger prompt. This is particularly useful for aliases. If both
files exist, the one in the home directory is read first and aliases
defined there can be overridden by the local file. This behavior can be
disabled by passing the "readrc=False" argument to the Pdb constructor.
Aside from aliases, the debugger is not directly programmable; but it
is implemented as a class from which you can derive your own debugger
class, which you can make as fancy as you like.
Debugger commands
=================
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Pdb.onecmdc C s� | j |�\}}}|sdS |dkr0d| j| j< dS |dkrBg | _dS | j| j }|rf|j|d | � n
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kr�d| j | j< g | _dS dS ) z8Handles one command line during command list definition.NZsilentT�endr r� �do_F) Z parselinerK rM r� rI r� rr �AttributeErrorr� r �commands_resumingrJ )r. r r7 �argZcmdlist�funcr r r r� � s,
zPdb.handle_command_defc C s t || jd� d S )N)�file)�printrP )r. �msgr r r rR � s z Pdb.messagec C s t d|| jd� d S )Nz***)r� )r� rP )r. r� r r r r� � s z Pdb.errorc C s� |j � jd�rg S y| j||||�}W n tk
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� jd�rT|j|d � qTW |S ) N�:�,�*�/�.py�.pyw)r� r� )r� r� ) rg �endswith�_complete_expression� Exception�globrD rF �isdirr� �isfile�lower)r. �textr �begidx�endidxZret�globs�fnr r r �_complete_location� s
zPdb._complete_locationc s � fdd�t tjj�D �S )Nc s. g | ]&\}}|d k rt |�j� �rt |��qS )N)r� �
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bpbynumber)r. r� r r� r� r )r� r �_complete_bpnumber� s zPdb._complete_bpnumberc s� | j s
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|�D �S �fdd�|j � D �S d S ) N�.r r c s" g | ]}|j � d �r�| �qS )r rx )r� )r� �n)�dottedr� r r r� � s z,Pdb._complete_expression.<locals>.<listcomp>c s g | ]}|j � �r|�qS r )r� )r� r� )r� r r r� � s rx rx ) rZ r" �copy�updater` r� rr �KeyErrorr� rG �dir�keys)r. r� r r� r� �nsr$ �partr )r� r� r� r r� � s
zPdb._complete_expressionc C s( |st tjj�d }n"y t|�}W n | jd� dS || _|| jkrf| j| | j| | j | f}nd}g | j|< d| j|< d| j |< | j
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a4 commands [bpnumber]
(com) ...
(com) end
(Pdb)
Specify a list of commands for breakpoint number bpnumber.
The commands themselves are entered on the following lines.
Type a line containing just 'end' to terminate the commands.
The commands are executed when the breakpoint is hit.
To remove all commands from a breakpoint, type commands and
follow it immediately with end; that is, give no commands.
With no bpnumber argument, commands refers to the last
breakpoint set.
You can use breakpoint commands to start your program up
again. Simply use the continue command, or step, or any other
command that resumes execution.
Specifying any command resuming execution (currently continue,
step, next, return, jump, quit and their abbreviations)
terminates the command list (as if that command was
immediately followed by end). This is because any time you
resume execution (even with a simple next or step), you may
encounter another breakpoint -- which could have its own
command list, leading to ambiguities about which list to
execute.
If you use the 'silent' command in the command list, the usual
message about stopping at a breakpoint is not printed. This
may be desirable for breakpoints that are to print a specific
message and then continue. If none of the other commands
print anything, you will see no sign that the breakpoint was
reached.
r z.Usage: commands [bnum]
...
endNTFz(com) r r� z1command definition aborted, old commands restored)�lenr4 r� r� �intr� rM rI rJ rK r9 rL r� rQ )r. r� ZbnumZold_command_defsZ prompt_backr r r � do_commands s@ %
zPdb.do_commandsr c C s@ |s<| j r8| jd� x"tjjD ]}|r | j|j� � q W dS d}d}d}|jd�}|dkr~||d d� j� }|d|� j� }|j d�}d} |dk�r|d|� j� }| j
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a� b(reak) [ ([filename:]lineno | function) [, condition] ]
Without argument, list all breaks.
With a line number argument, set a break at this line in the
current file. With a function name, set a break at the first
executable line of that function. If a second argument is
present, it is a string specifying an expression which must
evaluate to true before the breakpoint is honored.
The line number may be prefixed with a filename and a colon,
to specify a breakpoint in another file (probably one that
hasn't been loaded yet). The file is searched for on
sys.path; the .py suffix may be omitted.
z!Num Type Disp Enb WhereNr� r r r� z%r not found from sys.pathzBad lineno: %s�__func__zJThe specified object %r is not a function or was not found along sys.path.zBreakpoint %d at %s:%drx ) �breaksrR r4 r� r� Zbpformatr� r� r� �rfind� lookupmoduler� r� �
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z Pdb.do_breakc C s" | j jj}|dkr | jr | j}|S )z Produce a reasonable default.z<string>)rZ r] rm r< )r. r r r r r� � s
zPdb.defaultFilec C s | j |d� dS )z�tbreak [ ([filename:]lineno | function) [, condition] ]
Same arguments as break, but sets a temporary breakpoint: it
is automatically deleted when first hit.
r N)r� )r. r� r r r � do_tbreak� s z
Pdb.do_tbreakc
C s� d}|j d�}t|�dkr(|d j� }n t|�dkrB|d j� }n|S |dkrR|S |j d�}|d dkr~|d= t|�dkr~|S | j� }t|�dkr�|d }n | j|d �}|r�|}|d }t||�} | p�|S ) N�'r r � r2 r� r. )NNN)r� r� rg r� r� r )
r. Z
identifierZfailedZidstring�id�partsZfname�itemrb Zanswerr r r r� � s.
z Pdb.lineinfoc C s� t | d�r| jjnd}tj|||�}|s6| jd� dS |j� }| sp|d dksp|dd� dksp|dd� dkr~| jd � dS |S )
z�Check whether specified line seems to be executable.
Return `lineno` if it is, 0 if not (e.g. a docstring, comment, blank
line or EOF). Warning: testing is not comprehensive.
rZ Nz End of filer re r� z"""z'''zBlank or comment)r� rZ r" � linecache�getlinerR rg r� )r. r r r� r r r r r� � s
z
Pdb.checklinec C sl |j � }x^|D ]V}y| j|�}W n, tk
rL } z| j|� W Y dd}~X qX |j� | jd| � qW dS )z�enable bpnumber [bpnumber ...]
Enables the breakpoints given as a space separated list of
breakpoint numbers.
Nz
Enabled %s)r� �get_bpbynumberr� r� �enablerR )r. r� r� r+ r� r� r r r � do_enable� s
z
Pdb.do_enablec C sl |j � }x^|D ]V}y| j|�}W n, tk
rL } z| j|� W Y dd}~X qX |j� | jd| � qW dS )aN disable bpnumber [bpnumber ...]
Disables the breakpoints given as a space separated list of
breakpoint numbers. Disabling a breakpoint means it cannot
cause the program to stop execution, but unlike clearing a
breakpoint, it remains in the list of breakpoints and can be
(re-)enabled.
Nz Disabled %s)r� r� r� r� �disablerR )r. r� r� r+ r� r� r r r �
do_disable
s
zPdb.do_disablec C s� |j dd�}y |d }W n tk
r0 d}Y nX y| j|d j� �}W nH tk
rf | jd� Y nX tk
r� } z| j|� W Y dd}~X n.X ||_|s�| jd|j � n| jd|j � dS )a# condition bpnumber [condition]
Set a new condition for the breakpoint, an expression which
must evaluate to true before the breakpoint is honored. If
condition is absent, any existing condition is removed; i.e.,
the breakpoint is made unconditional.
r� r Nr zBreakpoint number expectedz#Breakpoint %d is now unconditional.z$New condition set for breakpoint %d.) r� �
IndexErrorr� rg r� r� r� rR r� )r. r� r� r� r� r� r r r � do_condition! s
zPdb.do_conditionc C s� |j � }yt|d j� �}W n d}Y nX y| j|d j� �}W nH tk
rb | jd� Y nv tk
r� } z| j|� W Y dd}~X nLX ||_|dkr�|dkr�d| }nd}| jd||j f � n| jd|j � dS ) a� ignore bpnumber [count]
Set the ignore count for the given breakpoint number. If
count is omitted, the ignore count is set to 0. A breakpoint
becomes active when the ignore count is zero. When non-zero,
the count is decremented each time the breakpoint is reached
and the breakpoint is not disabled and any associated
condition evaluates to true.
r r zBreakpoint number expectedNz %d crossingsz
1 crossingz%Will ignore next %s of breakpoint %d.z-Will stop next time breakpoint %d is reached.)
r� r� rg r� r� r� r� �ignorerR r� )r. r� r� �countr� r� Zcountstrr r r � do_ignore< s(
z
Pdb.do_ignorec
! C s� |sxy t d�}W n tk
r( d}Y nX |j� j� }|d krtdd� tjjD �}| j� x|D ]}| jd| � q^W dS d |k�r |j d �}|d|� }||d
d� }y t
|�}W n t k
r� d | }Y nX | j ||�}| j
||�}|� r�| j|� n x |D ]}| jd| � �qW dS |j� } xd| D ]\}y| j|�}W n. t k
�rl } z| j|� W Y dd}~X nX | j|� | jd| � �q,W dS )
a= cl(ear) filename:lineno
cl(ear) [bpnumber [bpnumber...]]
With a space separated list of breakpoint numbers, clear
those breakpoints. Without argument, clear all breaks (but
first ask confirmation). With a filename:lineno argument,
clear all breaks at that line in that file.
zClear all breaks? �no�y�yesc S s g | ] }|r|�qS r r )r� r� r r r r� m s z Pdb.do_clear.<locals>.<listcomp>z
Deleted %sNr� r zInvalid line number (%s))r� r� )�input�EOFErrorrg r� r4 r� r� Zclear_all_breaksrR r� r� r� r� Z clear_breakr� r� r� Zclear_bpbynumber)
r. r� ZreplyZbplistr� r+ r r r� Z
numberlistr r r �do_clear_ sF
z Pdb.do_clearc C s | j � dS )z�w(here)
Print a stack trace, with the most recent frame at the bottom.
An arrow indicates the "current frame", which determines the
context of most commands. 'bt' is an alias for this command.
N)�print_stack_trace)r. r� r r r �do_where� s z Pdb.do_wherec C s` d| kot | j�k n s"t�|| _| j| j d | _| jj| _| j| j| j � d | _d S )Nr ) r� rX �AssertionErrorrY rZ r# r` rt r )r. r� r r r �
_select_frame� s "
zPdb._select_framec C sx | j dkr| jd� dS yt|p"d�}W n" tk
rJ | jd| � dS X |dk rZd}ntd| j | �}| j|� dS )z�u(p) [count]
Move the current frame count (default one) levels up in the
stack trace (to an older frame).
r z Oldest frameNr zInvalid frame count (%s))rY r� r� r� �maxr )r. r� r� �newframer r r �do_up� s
z Pdb.do_upc C s� | j d t| j�kr"| jd� dS yt|p,d�}W n" tk
rT | jd| � dS X |dk rnt| j�d }ntt| j�d | j | �}| j|� dS )z�d(own) [count]
Move the current frame count (default one) levels down in the
stack trace (to a newer frame).
r z Newest frameNzInvalid frame count (%s)r )rY r� rX r� r� r� �minr )r. r� r� r r r r �do_down� s
z Pdb.do_downc C sf |rPy t |�}W n" tk
r2 | jd| � dS X || jjkrT| jd� dS nd}| j| j|� dS )aN unt(il) [lineno]
Without argument, continue execution until the line with a
number greater than the current one is reached. With a line
number, continue execution until a line with a number greater
or equal to that is reached. In both cases, also stop when
the current frame returns.
zError in argument: %rNz7"until" line number is smaller than current line numberr )r� r� r� rZ rn Z set_until)r. r� r r r r �do_until� s
z Pdb.do_untilc C s | j � dS )z�s(tep)
Execute the current line, stop at the first possible occasion
(either in a function that is called or in the current
function).
r )rS )r. r� r r r �do_step� s z Pdb.do_stepc C s | j | j� dS )zxn(ext)
Continue execution until the next line in the current function
is reached or it returns.
r )Zset_nextrZ )r. r� r r r �do_next� s z Pdb.do_nextc C s< |r4ddl }tjdd� }|j|�t_|tjdd�< t�dS )a run [args...]
Restart the debugged python program. If a string is supplied
it is split with "shlex", and the result is used as the new
sys.argv. History, breakpoints, actions and debugger options
are preserved. "restart" is an alias for "run".
r Nr )�shlexr� �argvr� r )r. r� r
Zargv0r r r �do_run� s z
Pdb.do_runc C s | j | j� dS )zPr(eturn)
Continue execution until the current function returns.
r )Z
set_returnrZ )r. r� r r r � do_return s z
Pdb.do_returnc C s> | j s2ytjtj| j�t_W n tk
r0 Y nX | j� dS )z]c(ont(inue))
Continue execution, only stop when a breakpoint is encountered.
r )rB r� r� rU r r� r� Z set_continue)r. r� r r r � do_continue s zPdb.do_continuec C s� | j d t| j�kr"| jd� dS y t|�}W n tk
rL | jd� Y nnX y:|| j_| j| j d |f| j| j < | j| j| j � W n0 tk
r� } z| jd| � W Y dd}~X nX dS )a� j(ump) lineno
Set the next line that will be executed. Only available in
the bottom-most frame. This lets you jump back and execute
code again, or jump forward to skip code that you don't want
to run.
It should be noted that not all jumps are allowed -- for
instance it is not possible to jump into the middle of a
for loop or out of a finally clause.
r z)You can only jump within the bottom frameNz)The 'jump' command requires a line numberr zJump failed: %s) rY r� rX r� r� r� rZ rn rt )r. r� �er r r �do_jump" s
z Pdb.do_jumpc C sz t jd� | jj}| j}t| j| j| j�}d| j j
� |_ | j d� t j |j
|||f� | j d� t j| j� |j| _dS )z�debug code
Enter a recursive debugger that steps through the code
argument (which is an arbitrary expression or statement to be
executed in the current environment).
Nz(%s) zENTERING RECURSIVE DEBUGGERzLEAVING RECURSIVE DEBUGGER)r� �settracerZ r" r` r rN rO rP r9 rg rR � call_tracingr Ztrace_dispatchrs )r. r� r� r� �pr r r �do_debug? s
z Pdb.do_debugc C s d| _ | j� dS )z[q(uit)
exit
Quit from the debugger. The program being executed is aborted.
Tr )�_user_requested_quit�set_quit)r. r� r r r �do_quitR s z Pdb.do_quitc C s | j d� d| _| j� dS )z=EOF
Handles the receipt of EOF as a command.
r2 Tr )rR r r )r. r� r r r �do_EOF] s
z
Pdb.do_EOFc C s� | j j}| j}|j}|jd@ r&|d }|jd@ r8|d }xJt|�D ]>}|j| }||krp| jd||| f � qB| jd|f � qBW dS )zHa(rgs)
Print the argument list of the current function.
� r � z%s = %rz%s = *** undefined ***N)rZ r] r` � co_argcount�co_flags�range� co_varnamesrR )r. r� �co�dictr� r+ �namer r r �do_argsf s
z Pdb.do_argsc C s. d| j kr | jt| j d �� n
| jd� dS )zQretval
Print the return value for the last return of a function.
rv zNot yet returned!N)r` rR r� r� )r. r� r r r � do_retvalw s
z
Pdb.do_retvalc
C sN yt || jj| j�S tj� d d� }| jtj|� d j � � � Y nX d S )Nr� r rx )
r� rZ r" r` r� r| r� rz r{ rg )r. r� r| r r r �_getval� s z Pdb._getvalc
C sh y.|d kr t || jj| j�S t ||j|j�S W n4 tj� d d� }tj|� d j � }t
d| �S d S )Nr� r z** raised %s **rx ) r� rZ r" r` r# r� r| rz r{ rg r- )r. r� rT r| r� r r r r� � s zPdb._getval_exceptc
C s* y| j t| j|��� W n Y nX dS )z@p expression
Print the value of the expression.
N)rR r� r' )r. r� r r r �do_p� s zPdb.do_pc
C s, y| j tj| j|��� W n Y nX dS )zHpp expression
Pretty-print the value of the expression.
N)rR �pprintZpformatr' )r. r� r r r �do_pp� s z Pdb.do_ppc C sd d| _ d}|r�|dkr�y^d|krX|jd�\}}t|j� �}t|j� �}||k rr|| }nt|j� �}td|d �}W q� tk
r� | jd| � dS X n0| jdks�|dkr�td| jj d �}n
| jd }|dkr�|d }| jj
j }| j |�}yZt
j|| jj�}| j||d |� ||| j� t|t|��| _t|�|k �rF| jd � W n tk
�r^ Y nX dS )
a� l(ist) [first [,last] | .]
List source code for the current file. Without arguments,
list 11 lines around the current line or continue the previous
listing. With . as argument, list 11 lines around the current
line. With one argument, list 11 lines starting at that line.
With two arguments, list the given range; if the second
argument is less than the first, it is a count.
The current line in the current frame is indicated by "->".
If an exception is being debugged, the line where the
exception was originally raised or propagated is indicated by
">>", if it differs from the current line.
r' Nr� r� r � zError in argument: %r�
z[EOF])rs r� r� rg r r� r� r rZ rn r] rm �get_file_breaksr� �getlinesr" � _print_linesr r� rR rQ )r. r� Zlast�firstr � breaklistr% r r r �do_list� s>
z Pdb.do_listc C sh | j jj}| j|�}yt| j �\}}W n* tk
rP } z| j|� dS d}~X nX | j|||| j � dS )z\longlist | ll
List the whole source code for the current function or frame.
N)rZ r] rm r- r& r r� r/ )r. r� r r1 r% r r� r r r � do_longlist� s
zPdb.do_longlistc C sj y| j |�}W n
dS yt|�\}}W n. ttfk
rX } z| j|� dS d}~X nX | j||� dS )z^source expression
Try to get source code for the given object and display it.
N)r' r& r � TypeErrorr� r/ )r. r� r$ r% r r� r r r � do_source� s
z
Pdb.do_sourcec
C s� |r|j }| jj|d
�}nd }}x�t||�D ]|\}}t|�jd�} t| �dk rX| d7 } ||krj| d7 } n| d7 } ||kr�| d7 } n||kr�| d7 } | j| d |j� � q.W d S ) zPrint a range of lines.r r� r r� �Bz->z>>� Nrx rx ) rn r> r� r r� �rjustr� rR r� )
r. r% r r� rT Zcurrent_linenoZ
exc_linenor r �sr r r r/ � s
zPdb._print_linesc C s� y| j |�}W n
dS d}y
|j}W n tk
r< Y nX |rV| jd|j � dS y |jj}W n tk
rv Y nX |r�| jd|j � dS |jtkr�| jd|j|j f � dS | jt|�� dS )z;whatis arg
Print the type of the argument.
Nz Function %sz Method %sz Class %s.%s)
r' r� r� rR r� r� � __class__�typer r )r. r� �valuer* r r r � do_whatis s.
z
Pdb.do_whatisc C sp |s<| j d� x\| jj| ji �j� D ]}| j d| � q$W n0| j|�}|| jj| ji �|< | j d||f � dS )z�display [expression]
Display the value of the expression if it changed, each time execution
stops in the current frame.
Without expression, list all display expressions for the current frame.
zCurrently displaying:z%s: %rzdisplay %s: %rN)rR r; r� rZ r� r� �
setdefault)r. r� r� �valr r r �
do_display4 s
zPdb.do_displayc C sT |r@y| j j| ji �|= W qP tk
r< | jd| � Y qPX n| j j| jd� dS )z�undisplay [expression]
Do not display the expression any more in the current frame.
Without expression, clear all display expressions for the current frame.
znot displaying %sN)r; r� rZ r� r� rf )r. r� r r r � do_undisplayG s zPdb.do_undisplayc s � fdd�| j j| ji �D �S )Nc s g | ]}|j � �r|�qS r )r� )r� r )r� r r r� W s z*Pdb.complete_undisplay.<locals>.<listcomp>)r; r� rZ )r. r� r r� r� r )r� r �complete_undisplayV s zPdb.complete_undisplayc C s* | j jj� }|j| j� tjd|d� dS )z�interact
Start an interactive interpreter whose global namespace
contains all the (global and local) names found in the current scope.
z
*interactive*)ZlocalN)rZ r" r� r� r` r* �interact)r. r� r� r r r � do_interactZ s zPdb.do_interactc C s� |j � }t|�dkrLt| jj� �}x$|D ] }| jd|| j| f � q(W dS |d | jkr�t|�dkr�| jd|d | j|d f � n dj|dd� �| j|d < dS )ac alias [name [command [parameter parameter ...] ]]
Create an alias called 'name' that executes 'command'. The
command must *not* be enclosed in quotes. Replaceable
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r r r r �<module> s B codeop.cpython-36.pyc 0000644 00000014200 15033571514 0010444 0 ustar 00 3
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dS )a[ Utilities to compile possibly incomplete Python source code.
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syntax error (OverflowError and ValueError can be produced by
malformed literals).
Approach:
First, check if the source consists entirely of blank lines and
comments; if so, replace it with 'pass', because the built-in
parser doesn't always do the right thing for these.
Compile three times: as is, with \n, and with \n\n appended. If it
compiles as is, it's complete. If it compiles with one \n appended,
we expect more. If it doesn't compile either way, we compare the
error we get when compiling with \n or \n\n appended. If the errors
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expect more. Not intuitive; not even guaranteed to hold in future
releases; but this matches the compiler's behavior from Python 1.4
through 2.2, at least.
Caveat:
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successful outcome before reaching the end of the source; in this
case, trailing symbols may be ignored instead of causing an error.
For example, a backslash followed by two newlines may be followed by
arbitrary garbage. This will be fixed once the API for the parser is
better.
The two interfaces are:
compile_command(source, filename, symbol):
Compiles a single command in the manner described above.
CommandCompiler():
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signature to compile_command; the difference is that if the
instance compiles program text containing a __future__ statement,
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r� w�Y nX e%e#d �r�e#j&ZP q�W [ej d k�r@eej'� j(j)d!�d �d"k�r@dZy ej*j+Z#W n dZ#Y nX e,e#d#e,e#d$d��ZW n Y nX d%d&� Z-d'd(� Z.d)d*� Z/da0e.eegZ1e-eeeeegZ2d+d,� Z3da4d9d-d.�Z5d/d0� Z6d1d2� Z7d3d4� Z8e d5�Z9e d6�Z:e d7�Z;e d8�Z<dS ):aQ UUID objects (universally unique identifiers) according to RFC 4122.
This module provides immutable UUID objects (class UUID) and the functions
uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5
UUIDs as specified in RFC 4122.
If all you want is a unique ID, you should probably call uuid1() or uuid4().
Note that uuid1() may compromise privacy since it creates a UUID containing
the computer's network address. uuid4() creates a random UUID.
Typical usage:
>>> import uuid
# make a UUID based on the host ID and current time
>>> uuid.uuid1() # doctest: +SKIP
UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
# make a UUID using an MD5 hash of a namespace UUID and a name
>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')
# make a random UUID
>>> uuid.uuid4() # doctest: +SKIP
UUID('16fd2706-8baf-433b-82eb-8c7fada847da')
# make a UUID using a SHA-1 hash of a namespace UUID and a name
>>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')
# make a UUID from a string of hex digits (braces and hyphens ignored)
>>> x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
# convert a UUID to a string of hex digits in standard form
>>> str(x)
'00010203-0405-0607-0809-0a0b0c0d0e0f'
# get the raw 16 bytes of the UUID
>>> x.bytes
b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
# make a UUID from a 16-byte string
>>> uuid.UUID(bytes=x.bytes)
UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')
� NzKa-Ping Yee <ping@zesty.ca>z reserved for NCS compatibilityzspecified in RFC 4122z$reserved for Microsoft compatibilityz reserved for future definitionc @ s e Zd ZdZd7dd�Zdd� Zdd� Zd d
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Converting a UUID to a string with str() yields something in the form
'12345678-1234-1234-1234-123456789abc'. The UUID constructor accepts
five possible forms: a similar string of hexadecimal digits, or a tuple
of six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
48-bit values respectively) as an argument named 'fields', or a string
of 16 bytes (with all the integer fields in big-endian order) as an
argument named 'bytes', or a string of 16 bytes (with the first three
fields in little-endian order) as an argument named 'bytes_le', or a
single 128-bit integer as an argument named 'int'.
UUIDs have these read-only attributes:
bytes the UUID as a 16-byte string (containing the six
integer fields in big-endian byte order)
bytes_le the UUID as a 16-byte string (with time_low, time_mid,
and time_hi_version in little-endian byte order)
fields a tuple of the six integer fields of the UUID,
which are also available as six individual attributes
and two derived attributes:
time_low the first 32 bits of the UUID
time_mid the next 16 bits of the UUID
time_hi_version the next 16 bits of the UUID
clock_seq_hi_variant the next 8 bits of the UUID
clock_seq_low the next 8 bits of the UUID
node the last 48 bits of the UUID
time the 60-bit timestamp
clock_seq the 14-bit sequence number
hex the UUID as a 32-character hexadecimal string
int the UUID as a 128-bit integer
urn the UUID as a URN as specified in RFC 4122
variant the UUID variant (one of the constants RESERVED_NCS,
RFC_4122, RESERVED_MICROSOFT, or RESERVED_FUTURE)
version the UUID version number (1 through 5, meaningful only
when the variant is RFC_4122)
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| k�o�d!kn �s�td"��|d7M }|d8O }|d:M }||d&> O }|| j d'< dS );am Create a UUID from either a string of 32 hexadecimal digits,
a string of 16 bytes as the 'bytes' argument, a string of 16 bytes
in little-endian order as the 'bytes_le' argument, a tuple of six
integers (32-bit time_low, 16-bit time_mid, 16-bit time_hi_version,
8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as
the 'fields' argument, or a single 128-bit integer as the 'int'
argument. When a string of hex digits is given, curly braces,
hyphens, and a URN prefix are all optional. For example, these
expressions all yield the same UUID:
UUID('{12345678-1234-5678-1234-567812345678}')
UUID('12345678123456781234567812345678')
UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
UUID(bytes='\x12\x34\x56\x78'*4)
UUID(bytes_le='\x78\x56\x34\x12\x34\x12\x78\x56' +
'\x12\x34\x56\x78\x12\x34\x56\x78')
UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
UUID(int=0x12345678123456781234567812345678)
Exactly one of 'hex', 'bytes', 'bytes_le', 'fields', or 'int' must
be given. The 'version' argument is optional; if given, the resulting
UUID will have its variant and version set according to RFC 4122,
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z UUID.__gt__c C s t |t�r| j|jkS tS )N)r r r r6 )r& r7 r3 r3 r4 �__le__� s
z UUID.__le__c C s t |t�r| j|jkS tS )N)r r r r6 )r& r7 r3 r3 r4 �__ge__� s
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encoding, errors : the encoding and error handler used to decode the
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<LI>QUERY_STRING
<LI>REMOTE_ADDR
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This is an implementation of decimal floating point arithmetic based on
the General Decimal Arithmetic Specification:
http://speleotrove.com/decimal/decarith.html
and IEEE standard 854-1987:
http://en.wikipedia.org/wiki/IEEE_854-1987
Decimal floating point has finite precision with arbitrarily large bounds.
The purpose of this module is to support arithmetic using familiar
"schoolhouse" rules and to avoid some of the tricky representation
issues associated with binary floating point. The package is especially
useful for financial applications or for contexts where users have
expectations that are at odds with binary floating point (for instance,
in binary floating point, 1.00 % 0.1 gives 0.09999999999999995 instead
of 0.0; Decimal('1.00') % Decimal('0.1') returns the expected
Decimal('0.00')).
Here are some examples of using the decimal module:
>>> from decimal import *
>>> setcontext(ExtendedContext)
>>> Decimal(0)
Decimal('0')
>>> Decimal('1')
Decimal('1')
>>> Decimal('-.0123')
Decimal('-0.0123')
>>> Decimal(123456)
Decimal('123456')
>>> Decimal('123.45e12345678')
Decimal('1.2345E+12345680')
>>> Decimal('1.33') + Decimal('1.27')
Decimal('2.60')
>>> Decimal('12.34') + Decimal('3.87') - Decimal('18.41')
Decimal('-2.20')
>>> dig = Decimal(1)
>>> print(dig / Decimal(3))
0.333333333
>>> getcontext().prec = 18
>>> print(dig / Decimal(3))
0.333333333333333333
>>> print(dig.sqrt())
1
>>> print(Decimal(3).sqrt())
1.73205080756887729
>>> print(Decimal(3) ** 123)
4.85192780976896427E+58
>>> inf = Decimal(1) / Decimal(0)
>>> print(inf)
Infinity
>>> neginf = Decimal(-1) / Decimal(0)
>>> print(neginf)
-Infinity
>>> print(neginf + inf)
NaN
>>> print(neginf * inf)
-Infinity
>>> print(dig / 0)
Infinity
>>> getcontext().traps[DivisionByZero] = 1
>>> print(dig / 0)
Traceback (most recent call last):
...
...
...
decimal.DivisionByZero: x / 0
>>> c = Context()
>>> c.traps[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.divide(Decimal(0), Decimal(0))
Decimal('NaN')
>>> c.traps[InvalidOperation] = 1
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> print(c.divide(Decimal(0), Decimal(0)))
Traceback (most recent call last):
...
...
...
decimal.InvalidOperation: 0 / 0
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> c.traps[InvalidOperation] = 0
>>> print(c.divide(Decimal(0), Decimal(0)))
NaN
>>> print(c.flags[InvalidOperation])
1
>>>
�Decimal�Context� DecimalTuple�DefaultContext� BasicContext�ExtendedContext�DecimalException�Clamped�InvalidOperation�DivisionByZero�Inexact�Rounded� Subnormal�Overflow� Underflow�FloatOperation�DivisionImpossible�InvalidContext�ConversionSyntax�DivisionUndefined�
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namedtuplezsign digits exponentc G s | S )N� )�argsr' r' �"/usr/lib64/python3.6/_pydecimal.py�<lambda>� s r* T� �? � l ��N�Zoi@�Tc @ s e Zd ZdZdd� ZdS )r a1 Base exception class.
Used exceptions derive from this.
If an exception derives from another exception besides this (such as
Underflow (Inexact, Rounded, Subnormal) that indicates that it is only
called if the others are present. This isn't actually used for
anything, though.
handle -- Called when context._raise_error is called and the
trap_enabler is not set. First argument is self, second is the
context. More arguments can be given, those being after
the explanation in _raise_error (For example,
context._raise_error(NewError, '(-x)!', self._sign) would
call NewError().handle(context, self._sign).)
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from DecimalException.
c G s d S )Nr' )�self�contextr( r' r' r) �handle� s zDecimalException.handleN)�__name__�
__module__� __qualname__�__doc__r0 r' r' r' r) r � s c @ s e Zd ZdZdS )r a) Exponent of a 0 changed to fit bounds.
This occurs and signals clamped if the exponent of a result has been
altered in order to fit the constraints of a specific concrete
representation. This may occur when the exponent of a zero result would
be outside the bounds of a representation, or when a large normal
number would have an encoded exponent that cannot be represented. In
this latter case, the exponent is reduced to fit and the corresponding
number of zero digits are appended to the coefficient ("fold-down").
N)r1 r2 r3 r4 r' r' r' r) r � s
c @ s e Zd ZdZdd� ZdS )r a0 An invalid operation was performed.
Various bad things cause this:
Something creates a signaling NaN
-INF + INF
0 * (+-)INF
(+-)INF / (+-)INF
x % 0
(+-)INF % x
x._rescale( non-integer )
sqrt(-x) , x > 0
0 ** 0
x ** (non-integer)
x ** (+-)INF
An operand is invalid
The result of the operation after these is a quiet positive NaN,
except when the cause is a signaling NaN, in which case the result is
also a quiet NaN, but with the original sign, and an optional
diagnostic information.
c G s, |r(t |d j|d jdd�}|j|�S tS )Nr% �nT)�_dec_from_triple�_sign�_int�_fix_nan�_NaN)r. r/ r( �ansr' r' r) r0 � s
zInvalidOperation.handleN)r1 r2 r3 r4 r0 r' r' r' r) r � s c @ s e Zd ZdZdd� ZdS )r z�Trying to convert badly formed string.
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syntax. The result is [0,qNaN].
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a� Division by 0.
This occurs and signals division-by-zero if division of a finite number
by zero was attempted (during a divide-integer or divide operation, or a
power operation with negative right-hand operand), and the dividend was
not zero.
The result of the operation is [sign,inf], where sign is the exclusive
or of the signs of the operands for divide, or is 1 for an odd power of
-0, for power.
c G s t | S )N)�_SignedInfinity)r. r/ �signr( r' r' r) r0 s zDivisionByZero.handleN)r1 r2 r3 r4 r0 r' r' r' r) r
s c @ s e Zd ZdZdd� ZdS )r z�Cannot perform the division adequately.
This occurs and signals invalid-operation if the integer result of a
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longer than precision). The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 s zDivisionImpossible.handleN)r1 r2 r3 r4 r0 r' r' r' r) r s c @ s e Zd ZdZdd� ZdS )r z�Undefined result of division.
This occurs and signals invalid-operation if division by zero was
attempted (during a divide-integer, divide, or remainder operation), and
the dividend is also zero. The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 ) s zDivisionUndefined.handleN)r1 r2 r3 r4 r0 r' r' r' r) r ! s c @ s e Zd ZdZdS )r a� Had to round, losing information.
This occurs and signals inexact whenever the result of an operation is
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result in all cases is unchanged.
The inexact signal may be tested (or trapped) to determine if a given
operation (or sequence of operations) was inexact.
N)r1 r2 r3 r4 r' r' r' r) r , s
c @ s e Zd ZdZdd� ZdS )r a� Invalid context. Unknown rounding, for example.
This occurs and signals invalid-operation if an invalid context was
detected during an operation. This can occur if contexts are not checked
on creation and either the precision exceeds the capability of the
underlying concrete representation or an unknown or unsupported rounding
was specified. These aspects of the context need only be checked when
the values are required to be used. The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 C s zInvalidContext.handleN)r1 r2 r3 r4 r0 r' r' r' r) r 8 s c @ s e Zd ZdZdS )r a� Number got rounded (not necessarily changed during rounding).
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rounded (that is, some zero or non-zero digits were discarded from the
coefficient), or if an overflow or underflow condition occurs. The
result in all cases is unchanged.
The rounded signal may be tested (or trapped) to determine if a given
operation (or sequence of operations) caused a loss of precision.
N)r1 r2 r3 r4 r' r' r' r) r F s
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a� Exponent < Emin before rounding.
This occurs and signals subnormal whenever the result of a conversion or
operation is subnormal (that is, its adjusted exponent is less than
Emin, before any rounding). The result in all cases is unchanged.
The subnormal signal may be tested (or trapped) to determine if a given
or operation (or sequence of operations) yielded a subnormal result.
N)r1 r2 r3 r4 r' r' r' r) r
R s c @ s e Zd ZdZdd� ZdS )r a Numerical overflow.
This occurs and signals overflow if the adjusted exponent of a result
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by zero), after rounding, would be greater than the largest value that
can be handled by the implementation (the value Emax).
The result depends on the rounding mode:
For round-half-up and round-half-even (and for round-half-down and
round-up, if implemented), the result of the operation is [sign,inf],
where sign is the sign of the intermediate result. For round-down, the
result is the largest finite number that can be represented in the
current precision, with the sign of the intermediate result. For
round-ceiling, the result is the same as for round-down if the sign of
the intermediate result is 1, or is [0,inf] otherwise. For round-floor,
the result is the same as for round-down if the sign of the intermediate
result is 0, or is [1,inf] otherwise. In all cases, Inexact and Rounded
will also be raised.
c G s� |j ttttfkrt| S |dkrR|j tkr4t| S t|d|j |j |j d �S |dkr�|j t
krlt| S t|d|j |j |j d �S d S )Nr% �9r- ) �roundingr r r r r< r r6 �prec�Emaxr )r. r/ r= r( r' r' r) r0 s s
zOverflow.handleN)r1 r2 r3 r4 r0 r' r' r' r) r ] s c @ s e Zd ZdZdS )r ax Numerical underflow with result rounded to 0.
This occurs and signals underflow if a result is inexact and the
adjusted exponent of the result would be smaller (more negative) than
the smallest value that can be handled by the implementation (the value
Emin). That is, the result is both inexact and subnormal.
The result after an underflow will be a subnormal number rounded, if
necessary, so that its exponent is not less than Etiny. This may result
in 0 with the sign of the intermediate result and an exponent of Etiny.
In all cases, Inexact, Rounded, and Subnormal will also be raised.
N)r1 r2 r3 r4 r' r' r' r) r � s
c @ s e Zd ZdZdS )r a� Enable stricter semantics for mixing floats and Decimals.
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Any occurrence of a mixed operation is silently recorded by setting
FloatOperation in the context flags. Explicit conversions with
Decimal.from_float() or context.create_decimal_from_float() do not
set the flag.
Otherwise (the signal is trapped), only equality comparisons and explicit
conversions are silent. All other mixed operations raise FloatOperation.
N)r1 r2 r3 r4 r' r' r' r) r � s
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|j t S )N)�modules� __xname__)r. �sysr' r' r) �local� s zMockThreading.localN)r1 r2 r3 rE rF r' r' r' r) rB � s rB �__decimal_context__c C s, | t ttfkr | j� } | j� | tj� _dS )z%Set this thread's context to context.N)r r r �copy� clear_flags� threading�current_threadrG )r/ r' r' r) r � s c C s4 y
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N)rG rL r )�_localr/ r' r' r) r � s c C s( | t ttfkr | j� } | j� | |_dS )z%Set this thread's context to context.N)r r r rH rI rG )r/ rM r' r' r) r � s c C s | dkrt � } t| �S )ab Return a context manager for a copy of the supplied context
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in a with statement:
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# Rest of sin calculation algorithm
# uses a precision 2 greater than normal
return +s # Convert result to normal precision
def sin(x):
with localcontext(ExtendedContext):
# Rest of sin calculation algorithm
# uses the Extended Context from the
# General Decimal Arithmetic Specification
return +s # Convert result to normal context
>>> setcontext(DefaultContext)
>>> print(getcontext().prec)
28
>>> with localcontext():
... ctx = getcontext()
... ctx.prec += 2
... print(ctx.prec)
...
30
>>> with localcontext(ExtendedContext):
... print(getcontext().prec)
...
9
>>> print(getcontext().prec)
28
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Decimal('3.14')
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Decimal('3.14')
>>> Decimal(314) # int
Decimal('314')
>>> Decimal(Decimal(314)) # another decimal instance
Decimal('314')
>>> Decimal(' 3.14 \n') # leading and trailing whitespace okay
Decimal('3.14')
�_� Nz Invalid literal for Decimal: %rr= �-r- r% �intZfrac�exprQ F�diag�signal�Nr5 �FT� ztInvalid tuple size in creation of Decimal from list or tuple. The list or tuple should have exactly three elements.z|Invalid sign. The first value in the tuple should be an integer; either 0 for a positive number or 1 for a negative number.r+ � zTThe second value in the tuple must be composed of integers in the range 0 through 9.zUThe third value in the tuple must be an integer, or one of the strings 'F', 'n', 'N'.z;strict semantics for mixing floats and Decimals are enabledz Cannot convert %r to Decimal)r% r- )r5 rY )!�object�__new__�
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value is stored as the nearest representable value which is
0x1.999999999999ap-4. The exact equivalent of the value in decimal
is 0.1000000000000000055511151231257827021181583404541015625.
>>> Decimal.from_float(0.1)
Decimal('0.1000000000000000055511151231257827021181583404541015625')
>>> Decimal.from_float(float('nan'))
Decimal('NaN')
>>> Decimal.from_float(float('inf'))
Decimal('Infinity')
>>> Decimal.from_float(-float('inf'))
Decimal('-Infinity')
>>> Decimal.from_float(-0.0)
Decimal('-0')
z argument must be int or float.g �?r% r- � N)r_ rU rp rr �_mathZisinfZisnan�reprZcopysignrh �as_integer_ratio�
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zDecimal.from_floatc C s( | j r$| j}|dkrdS |dkr$dS dS )zrReturns whether the number is not actually one.
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r5 r- rY r+ r% )rP rO )r. rV r' r' r) �_isnan� s zDecimal._isnanc C s | j dkr| jrdS dS dS )zyReturns whether the number is infinite
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zDecimal._isinfinityc C s| | j � }|dkrd}n|j � }|s&|rx|dkr4t� }|dkrJ|jtd| �S |dkr`|jtd|�S |rn| j|�S |j|�S dS )z�Returns whether the number is not actually one.
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compare_signal, __le__, __lt__, __ge__, __gt__.
Signal InvalidOperation if either self or other is a (quiet
or signaling) NaN. Signaling NaNs take precedence over quiet
NaNs.
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Nzcomparison involving sNaNzcomparison involving NaNr% )r rP �is_snanrd r �is_qnan)r. r� r/ r' r' r) �_compare_check_nans. s( zDecimal._compare_check_nansc C s | j p| jdkS )zuReturn True if self is nonzero; otherwise return False.
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rQ )rP r8 )r. r' r' r) �__bool__O s zDecimal.__bool__c C s | j s |j r8| j� }|j� }||kr(dS ||k r4dS dS | sP|sDdS d|j S |s^d| j S |j| jk rndS | j|jk r~dS | j� }|j� }||k� r�| jd| j|j }|jd|j| j }||kr�dS ||k r�d | j S d
| j S n ||k�rd | j S d | j S dS )
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z Decimal._cmpc C s< t | |dd�\} }|tkr |S | j||�r.dS | j|�dkS )NT)� equality_opFr% )�_convert_for_comparison�NotImplementedr� r� )r. r� r/ r' r' r) �__eq__� s zDecimal.__eq__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dk S )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__lt__� s zDecimal.__lt__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__le__� s zDecimal.__le__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__gt__� s zDecimal.__gt__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__ge__� s zDecimal.__ge__c C s> t |dd�}| js |r0|jr0| j||�}|r0|S t| j|��S )z�Compare self to other. Return a decimal value:
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T)�raiseit)�_convert_otherrP r� r r� )r. r� r/ r; r' r' r) �compare� s zDecimal.comparec C s� | j r4| j� rtd��n | j� r$tS | jr0t S tS | jdkrNtd| jt �}ntt
| j t �}t | j �| t }| dkr||n| }|dkr�dS |S )zx.__hash__() <==> hash(x)z"Cannot hash a signaling NaN value.r% �
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)r r7 rk ro rU r8 rO )r. r' r' r) �as_tuple� s zDecimal.as_tuplec C s� | j r | j� rtd��ntd��| s(dS t| j�}| jdkrR|d| j d }}nr| j }x(|dkr�|d dkr�|d }|d8 }q\W | j }t|| @ j� d |�}|r�||L }||8 }d| |> }| j r�| }||fS )a� Express a finite Decimal instance in the form n / d.
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or NaN, raises OverflowError or ValueError respectively.
>>> Decimal('3.14').as_integer_ratio()
(157, 50)
>>> Decimal('-123e5').as_integer_ratio()
(-12300000, 1)
>>> Decimal('0.00').as_integer_ratio()
(0, 1)
z#cannot convert NaN to integer ratioz(cannot convert Infinity to integer ratior% r- r� ry )r% r- )
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rS rT rZ ZInfinityr5 �NaNr� r% � r- rQ r[ �.N�e�Ez%+di����)r7 rP rO r8 rf r �capitals) r. �engr/ r= �
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zDecimal.__str__c C s | j d|d�S )a, Convert to a string, using engineering notation if an exponent is needed.
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require the addition of either one or two trailing zeros.
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zDecimal.__neg__c C sT | j r| j|d�}|r|S |dkr(t� }| rB|jtkrB| j� }nt| �}|j|�S )zhReturns a copy, unless it is a sNaN.
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)r/ N)rP r� r r? r r� r r� )r. r/ r; r' r' r) �__pos__ s
zDecimal.__pos__Tc C sJ |s | j � S | jr&| j|d�}|r&|S | jr:| j|d�}n | j|d�}|S )z�Returns the absolute value of self.
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expression self.__abs__(round=False) is equivalent to
self.copy_abs().
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instance self to the nearest integer. If self is infinite or
a NaN then a Python exception is raised. If self is finite
and lies exactly halfway between two integers then it is
rounded to the integer with even last digit.
>>> round(Decimal('123.456'))
123
>>> round(Decimal('-456.789'))
-457
>>> round(Decimal('-3.0'))
-3
>>> round(Decimal('2.5'))
2
>>> round(Decimal('3.5'))
4
>>> round(Decimal('Inf'))
Traceback (most recent call last):
...
OverflowError: cannot round an infinity
>>> round(Decimal('NaN'))
Traceback (most recent call last):
...
ValueError: cannot round a NaN
If a second argument n is supplied, self is rounded to n
decimal places using the rounding mode for the current
context.
For an integer n, round(self, -n) is exactly equivalent to
self.quantize(Decimal('1En')).
>>> round(Decimal('123.456'), 0)
Decimal('123')
>>> round(Decimal('123.456'), 2)
Decimal('123.46')
>>> round(Decimal('123.456'), -2)
Decimal('1E+2')
>>> round(Decimal('-Infinity'), 37)
Decimal('NaN')
>>> round(Decimal('sNaN123'), 0)
Decimal('NaN123')
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where p is the context precision.
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result that would be obtained by computing (self**other) %
modulo with unbounded precision, but is computed more
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z�Quantize self so its exponent is the same as that of exp.
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T)r� Nzquantize with one INFz)target exponent out of bounds in quantizerQ z9exponent of quantize result too large for current contextr- z7quantize result has too many digits for current context)r� r r? rP r� r� r rd r r� rO rA r6 r7 r� r� r@ r� rf r8 �Eminr
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sT
zDecimal.quantizec C sD t |dd�}| js|jr8| j� r(|j� p6| j� o6|j� S | j|jkS )a= Return True if self and other have the same exponent; otherwise
return False.
If either operand is a special value, the following rules are used:
* return True if both operands are infinities
* return True if both operands are NaNs
* otherwise, return False.
T)r� )r� rP r� � is_infiniterO )r. r� r/ r' r' r) � same_quantumJ
s
zDecimal.same_quantumc C s� | j rt| �S | s t| jd|�S | j|krHt| j| jd| j| |�S t| j�| j | }|dk rzt| jd|d �} d}| j| }|| |�}| jd|� p�d}|dkr�tt |�d �}t| j||�S )as Rescale self so that the exponent is exp, either by padding with zeros
or by truncating digits, using the given rounding mode.
Specials are returned without change. This operation is
quiet: it raises no flags, and uses no information from the
context.
exp = exp to scale to (an integer)
rounding = rounding mode
rQ r% r� r- N)
rP r r6 r7 rO r8 rf r� r` rU )r. rV r? rx Z
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zDecimal._rescalec C sh |dkrt d��| js | r$t| �S | j| j� d | |�}|j� | j� krd|j|j� d | |�}|S )a" Round a nonzero, nonspecial Decimal to a fixed number of
significant figures, using the given rounding mode.
Infinities, NaNs and zeros are returned unaltered.
This operation is quiet: it raises no flags, and uses no
information from the context.
r% z'argument should be at least 1 in _roundr- )rl rP r r� r� )r. �placesr? r; r' r' r) �_round{
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zDecimal._roundc C s� | j r"| j|d�}|r|S t| �S | jdkr4t| �S | sFt| jdd�S |dkrTt� }|dkrb|j}| jd|�}|| kr�|j t
� |j t � |S )aV Rounds to a nearby integer.
If no rounding mode is specified, take the rounding mode from
the context. This method raises the Rounded and Inexact flags
when appropriate.
See also: to_integral_value, which does exactly the same as
this method except that it doesn't raise Inexact or Rounded.
)r/ r% rQ N) rP r� r rO r6 r7 r r? r� rd r r )r. r? r/ r; r' r' r) �to_integral_exact�
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zDecimal.to_integral_exactc C s` |dkrt � }|dkr |j}| jr>| j|d�}|r6|S t| �S | jdkrPt| �S | jd|�S dS )z@Rounds to the nearest integer, without raising inexact, rounded.N)r/ r% )r r? rP r� r rO r� )r. r? r/ r; r' r' r) r� �
s
zDecimal.to_integral_valuec C s� |dkrt � }| jrB| j|d�}|r(|S | j� rB| jdkrBt| �S | sdt| jd| jd �}|j|�S | jdkrz|j t
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|_|S ) z Return the square root of self.N)r/ r% rQ r+ r- zsqrt(-x), x > 0r� r Try )r rP r� r� r7 r r6 rO r� rd r r@ ri rV rU rf r8 r� r` �
_shallow_copy�
_set_roundingr r? )r. r/ r; r@ �opr� �c�lr� r r� r5 r� r? r' r' r) �sqrt�
s`
z Decimal.sqrtc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j|�}|dkr�| j|�}|dkr�|}n| }|j|�S )z�Returns the larger value.
Like max(self, other) except if one is not a number, returns
NaN (and signals if one is sNaN). Also rounds.
T)r� Nr- r% r� )r� r rP r� r� r� r� �
compare_total)r. r� r/ �sn�onr+ r; r' r' r) r� % s&
z Decimal.maxc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j|�}|dkr�| j|�}|dkr�| }n|}|j|�S )z�Returns the smaller value.
Like min(self, other) except if one is not a number, returns
NaN (and signals if one is sNaN). Also rounds.
T)r� Nr- r% r� )r� r rP r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) r� O s&
z Decimal.minc C s8 | j r
dS | jdkrdS | j| jd� }|dt|� kS )z"Returns whether self is an integerFr% TNrQ )rP rO r8 rf )r. �restr' r' r) r� q s
zDecimal._isintegerc C s( | s| j dkrdS | jd| j dkS )z:Returns True if self is even. Assumes self is an integer.r% Tr- r� r� )rO r8 )r. r' r' r) r� z s zDecimal._isevenc C s. y| j t| j� d S tk
r( dS X dS )z$Return the adjusted exponent of selfr- r% N)rO rf r8 rr )r. r' r' r) r� � s zDecimal.adjustedc C s | S )z�Returns the same Decimal object.
As we do not have different encodings for the same number, the
received object already is in its canonical form.
r' )r. r' r' r) � canonical� s zDecimal.canonicalc C s. t |dd�}| j||�}|r |S | j||d�S )z�Compares self to the other operand numerically.
It's pretty much like compare(), but all NaNs signal, with signaling
NaNs taking precedence over quiet NaNs.
T)r� )r/ )r� r� r� )r. r� r/ r; r' r' r) �compare_signal� s
zDecimal.compare_signalc C sf t |dd�}| jr |j r tS | j r0|jr0tS | j}| j� }|j� }|sP|�r||kr�t| j�| jf}t|j�|jf}||k r�|r�tS tS ||kr�|r�tS tS tS |r�|dkr�tS |dkr�tS |dkr�tS |dkr�tS n4|dkr�tS |dkr�tS |dk�r tS |dk�rtS | |k �r tS | |k�r*tS | j|jk �rF|�rBtS tS | j|jk�rb|�r^tS tS tS )z�Compares self to other using the abstract representations.
This is not like the standard compare, which use their numerical
value. Note that a total ordering is defined for all possible abstract
representations.
T)r� r- r+ ) r� r7 � _NegativeOner r� rf r8 �_ZerorO )r. r� r/ r= Zself_nanZ other_nanZself_keyZ other_keyr' r' r) r. � sf
zDecimal.compare_totalc C s& t |dd�}| j� }|j� }|j|�S )z�Compares self to other using abstract repr., ignoring sign.
Like compare_total, but with operand's sign ignored and assumed to be 0.
T)r� )r� r� r. )r. r� r/ r� �or' r' r) �compare_total_mag� s zDecimal.compare_total_magc C s t d| j| j| j�S )z'Returns a copy with the sign set to 0. r% )r6 r8 rO rP )r. r' r' r) r� � s zDecimal.copy_absc C s2 | j rtd| j| j| j�S td| j| j| j�S dS )z&Returns a copy with the sign inverted.r% r- N)r7 r6 r8 rO rP )r. r' r' r) r� � s zDecimal.copy_negatec C s" t |dd�}t|j| j| j| j�S )z$Returns self with the sign of other.T)r� )r� r6 r7 r8 rO rP )r. r� r/ r' r' r) � copy_sign� s
zDecimal.copy_signc C s� |dkrt � }| j|d�}|r"|S | j� d kr2tS | s:tS | j� dkrNt| �S |j}| j� }| jdkr�|t t
|j d d ��kr�t dd|j d �}�n0| jdkr�|t t
|j
� d d ��kr�t dd|j
� d �}n�| jdko�|| k �r
t ddd|d d | �}n�| jdk�rB|| d k �rBt dd|d | d �}n�t| �}|j|j }}|jdk�rj| }d}xFt|||| �\} }
| d d
t t
| ��| d �r�P |d7 }�qpW t dt
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�}|j� }|jt�} |j|�}| |_|S ) zReturns e ** self.N)r/ r- r% r[ r� rQ r> ry r� r� )r r� r� r5 r r r@ r� r7 rf r` rA r6 r� ri rU rV r= �_dexpr( r) r r� r? ) r. r/ r; r �adjr* r+ r� r r� rV r? r' r' r) rV sJ $( "
z Decimal.expc C s dS )z�Return True if self is canonical; otherwise return False.
Currently, the encoding of a Decimal instance is always
canonical, so this method returns True for any Decimal.
Tr' )r. r' r' r) � is_canonicalL s zDecimal.is_canonicalc C s | j S )z�Return True if self is finite; otherwise return False.
A Decimal instance is considered finite if it is neither
infinite nor a NaN.
)rP )r. r' r' r) � is_finiteT s zDecimal.is_finitec C s
| j dkS )z8Return True if self is infinite; otherwise return False.rZ )rO )r. r' r' r) r# \ s zDecimal.is_infinitec C s
| j dkS )z>Return True if self is a qNaN or sNaN; otherwise return False.r5 rY )r5 rY )rO )r. r' r' r) r� ` s zDecimal.is_nanc C s, | j s | rdS |dkr t� }|j| j� kS )z?Return True if self is a normal number; otherwise return False.FN)rP r r" r� )r. r/ r' r' r) � is_normald s
zDecimal.is_normalc C s
| j dkS )z;Return True if self is a quiet NaN; otherwise return False.r5 )rO )r. r' r' r) r� l s zDecimal.is_qnanc C s
| j dkS )z8Return True if self is negative; otherwise return False.r- )r7 )r. r' r' r) � is_signedp s zDecimal.is_signedc C s
| j dkS )z?Return True if self is a signaling NaN; otherwise return False.rY )rO )r. r' r' r) r� t s zDecimal.is_snanc C s, | j s | rdS |dkr t� }| j� |jk S )z9Return True if self is subnormal; otherwise return False.FN)rP r r� r" )r. r/ r' r' r) � is_subnormalx s
zDecimal.is_subnormalc C s | j o| jdkS )z6Return True if self is a zero; otherwise return False.rQ )rP r8 )r. r' r' r) �is_zero� s zDecimal.is_zeroc C s� | j t| j� d }|dkr4tt|d d ��d S |dkrXttd| d d ��d S t| �}|j|j }}|dkr�t|d| �}t|�}t|�t|� ||k S |ttd| | �� d S )z�Compute a lower bound for the adjusted exponent of self.ln().
In other words, compute r such that self.ln() >= 10**r. Assumes
that self is finite and positive and that self != 1.
r- � r� r+ r% r� r� )rO rf r8 r` ri rU rV )r. r: r* r+ r� �num�denr' r' r) �
_ln_exp_bound� s zDecimal._ln_exp_boundc
C s |dkrt � }| j|d�}|r"|S | s*tS | j� dkr:tS | tkrFtS | jdkr\|jt d�S t
| �}|j |j }}|j
}|| j� d }x>t|||�}|ddttt|���| d r�P |d7 }q�W tt |d k �tt|��| �}|j� }|jt�} |j|�}| |_|S )
z/Returns the natural (base e) logarithm of self.N)r/ r- zln of a negative valuer+ ry r� r[ r% )r r� �_NegativeInfinityr� � _Infinityr r5 r7 rd r ri rU rV r@ rD �_dlogrf r` rh r6 r( r) r r� r? )
r. r/ r; r* r+ r� r r% r� r? r' r' r) �ln� s:
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Decimal.lnc C s� | j t| j� d }|dkr,tt|��d S |dkrHttd| ��d S t| �}|j|j }}|dkr�t|d| �}td| �}t|�t|� ||k d S td| | �}t|�| |dk d S ) z�Compute a lower bound for the adjusted exponent of self.log10().
In other words, find r such that self.log10() >= 10**r.
Assumes that self is finite and positive and that self != 1.
r- r+ r% r� �� Z231r� r� )rO rf r8 r` ri rU rV )r. r: r* r+ r� rB rC r' r' r) r � s zDecimal._log10_exp_boundc
C sH |dkrt � }| j|d�}|r"|S | s*tS | j� dkr:tS | jdkrP|jtd�S | jd dkr�| jdd� dt | j�d kr�t
| j t | j� d �}n�t | �}|j
|j }}|j}|| j� d }x>t|||�}|d d
t tt|���| d r�P |d 7 }q�W tt
|dk �tt|��| �}|j� }|jt�} |j|�}| |_|S ) z&Returns the base 10 logarithm of self.N)r/ r- zlog10 of a negative valuer% r� rQ r+ ry r� r[ )r r� rE r� rF r7 rd r r8 rf r rO ri rU rV r@ r �_dlog10r` rh r6 r( r) r r� r? )
r. r/ r; r* r+ r� r r% r� r? r' r' r) �log10� s:
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Decimal.log10c C sV | j |d�}|r|S |dkr"t� }| j� r.tS | s@|jtdd�S t| j� �}|j|�S )aM Returns the exponent of the magnitude of self's MSD.
The result is the integer which is the exponent of the magnitude
of the most significant digit of self (as though it were truncated
to a single digit while maintaining the value of that digit and
without limiting the resulting exponent).
)r/ Nzlogb(0)r- ) r� r r� rF rd r
r r� r� )r. r/ r; r' r' r) �logb
s z Decimal.logbc C s8 | j dks| jdkrdS x| jD ]}|dkr dS q W dS )z�Return True if self is a logical operand.
For being logical, it must be a finite number with a sign of 0,
an exponent of 0, and a coefficient whose digits must all be
either 0 or 1.
r% FZ01T)r7 rO r8 )r. �digr' r' r) �
_islogical>
s zDecimal._islogicalc C s� |j t|� }|dkr$d| | }n|dk r<||j d � }|j t|� }|dkr`d| | }n|dk rx||j d � }||fS )Nr% rQ )r@ rf )r. r/ �opa�opbZdifr' r' r) �
_fill_logicalL
s zDecimal._fill_logicalc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z;Applies an 'and' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�@ ��qS r' )r` rU )�.0r �br' r' r) �
<listcomp>g
s z'Decimal.logical_and.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn �zipr6 rg )r. r� r/ rO rP r� r' r' r) � logical_andY
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zDecimal.logical_andc C s( |dkrt � }| jtdd|j d�|�S )zInvert all its digits.Nr% r� )r � logical_xorr6 r@ )r. r/ r' r' r) �logical_invertj
s zDecimal.logical_invertc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z:Applies an 'or' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�B ��qS r' )r` rU )rR r rS r' r' r) rT
s z&Decimal.logical_or.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn rU r6 rg )r. r� r/ rO rP r� r' r' r) �
logical_orq
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zDecimal.logical_orc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z;Applies an 'xor' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�A ��qS r' )r` rU )rR r rS r' r' r) rT �
s z'Decimal.logical_xor.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn rU r6 rg )r. r� r/ rO rP r� r' r' r) rW �
s
zDecimal.logical_xorc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j� j|j� �}|dkr�| j|�}|dkr�|}n| }|j|�S )z8Compares the values numerically with their sign ignored.T)r� Nr- r% r� ) r� r rP r� r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) �max_mag�
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zDecimal.max_magc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j� j|j� �}|dkr�| j|�}|dkr�| }n|}|j|�S )z8Compares the values numerically with their sign ignored.T)r� Nr- r% r� ) r� r rP r� r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) �min_mag�
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zDecimal.min_magc C s� |dkrt � }| j|d�}|r"|S | j� dkr2tS | j� dkrTtdd|j |j� �S |j� }|jt � |j
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� d �|�S )z=Returns the largest representable number smaller than itself.N)r/ r- r% r> r� r� )r r� r� rE r6 r@ r� rH r) r �_ignore_all_flagsr� r� r� )r. r/ r; �new_selfr' r' r) �
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zDecimal.next_minusc C s� |dkrt � }| j|d�}|r"|S | j� dkr2tS | j� dkrTtdd|j |j� �S |j� }|jt � |j
� | j |�}|| kr�|S | j tdd|j
� d �|�S )z=Returns the smallest representable number larger than itself.N)r/ r- r> r% r� r� )r r� r� rF r6 r@ r� rH r) r r\ r� r� r� )r. r/ r; r] r' r' r) � next_plus�
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zDecimal.next_plusc C s� t |dd�}|dkrt� }| j||�}|r.|S | j|�}|dkrJ| j|�S |dkr^| j|�}n
| j|�}|j� r�|jt d|j
� |jt � |jt � nD|j
� |jk r�|jt� |jt� |jt � |jt � |s�|jt� |S )a� Returns the number closest to self, in the direction towards other.
The result is the closest representable number to self
(excluding self) that is in the direction towards other,
unless both have the same value. If the two operands are
numerically equal, then the result is a copy of self with the
sign set to be the same as the sign of other.
T)r� Nr% r- z Infinite result from next_towardr� )r� r r� r� r8 r_ r^ r� rd r r7 r r r� r" r r
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zDecimal.next_towardc C s� | j � r dS | j� rdS | j� }|dkr,dS |dkr8dS | j� rN| jrJdS dS |dkr\t� }| j|d �rv| jrrd
S d S | jr�d S d
S dS )a Returns an indication of the class of self.
The class is one of the following strings:
sNaN
NaN
-Infinity
-Normal
-Subnormal
-Zero
+Zero
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+Infinity
r� r� r- z +Infinityz -Infinityz-Zeroz+ZeroN)r/ z
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|jd�p�d| j�S )z5Returns a rotated copy of self, value-of-other times.NT)r� r% rQ )r r� r� rO rd r r@ rU r� r r8 rf r6 r7 rg )r. r� r/ r; �torot�rotdig�topadZrotatedr' r' r) �rotateY s,
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zDecimal.rotatec C s� |dkrt � }t|dd�}| j||�}|r.|S |jdkrB|jt�S d|j|j }d|j|j }|t|� kox|kn s�|jt�S | j � r�t
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| jt|� �}|j|�}|S )z>Returns self operand after adding the second value to its exp.NT)r� r% r+ r� )r r� r� rO rd r rA r@ rU r� r r6 r7 r8 r� )r. r� r/ r; ZliminfZlimsupr r' r' r) �scalebz s"
zDecimal.scalebc C s |dkrt � }t|dd�}| j||�}|r.|S |jdkrB|jt�S |j t|� ko^|jkn sn|jt�S | j� r~t | �S t|�}| j
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|jd��p d| j�S )z5Returns a shifted copy of self, value-of-other times.NT)r� r% rQ )r r� r� rO rd r r@ rU r� r r8 rf r6 r7 rg )r. r� r/ r; rd re rf Zshiftedr' r' r) r� � s2
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|�S )a| Format a Decimal instance according to the given specifier.
The specifier should be a standard format specifier, with the
form described in PEP 3101. Formatting types 'e', 'E', 'f',
'F', 'g', 'G', 'n' and '%' are supported. If the formatting
type is omitted it defaults to 'g' or 'G', depending on the
value of context.capitals.
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. * ! 'Fc C s& t jt�}| |_||_||_||_|S )z�Create a decimal instance directly, without any validation,
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z_ContextManager.__enter__c C s t | j� d S )N)r r� )r. �t�v�tbr' r' r) �__exit__? s z_ContextManager.__exit__N)r1 r2 r3 r4 r� r� r� r' r' r' r) rN 3 s rN c @ s� e Zd ZdZd�dd�Zdd� Zdd� Zd d
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prec - precision (for use in rounding, division, square roots..)
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traps - If traps[exception] = 1, then the exception is
raised when it is caused. Otherwise, a value is
substituted in.
flags - When an exception is caused, flags[exception] is set.
(Whether or not the trap_enabler is set)
Should be reset by user of Decimal instance.
Emin - Minimum exponent
Emax - Maximum exponent
capitals - If 1, 1*10^1 is printed as 1E+1.
If 0, printed as 1e1
clamp - If 1, change exponents if too high (Default 0)
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� D ��| _n� | _d S )Nc 3 s | ]}|t |� k�fV qd S )N)rU )rR r� )r r' r) � <genexpr>n s z#Context.__init__.<locals>.<genexpr>r% c 3 s | ]}|t |� k�fV qd S )N)rU )rR r� )r r' r) r� u s )r � NameErrorr@ r? r" rA r� r� �_ignored_flagsr rH r_ r� r �fromkeysr ) r. r@ r? r" rA r� r� r r r� Zdcr' )r r r) r� U s.
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kr�| j||�S |dkr�tj| ||�S td| ��d S )Nr@ r- ra r" z-infr% rA r� r� r? z%s: invalid rounding moder r r� z.'decimal.Context' object has no attribute '%s')r� �_rounding_modesrr r] r� r� rL )r. r� rt r' r' r) r� � s( zContext.__setattr__c C s t d| ��d S )Nz%s cannot be deleted)rL )r. r� r' r' r) � __delattr__� s zContext.__delattr__c C sN dd� | j j� D �}dd� | jj� D �}| j| j| j| j| j| j| j ||ffS )Nc S s g | ]\}}|r|�qS r' r' )rR �sigr� r' r' r) rT � s z&Context.__reduce__.<locals>.<listcomp>c S s g | ]\}}|r|�qS r' r' )rR r� r� r' r' r) rT � s )
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zShow the current context.zrContext(prec=%(prec)d, rounding=%(rounding)s, Emin=%(Emin)d, Emax=%(Emax)d, capitals=%(capitals)d, clamp=%(clamp)dc S s g | ]\}}|r|j �qS r' )r1 )rR r~ r� r' r' r) rT � s z$Context.__repr__.<locals>.<listcomp>zflags=[z, �]c S s g | ]\}}|r|j �qS r' )r1 )rR r� r� r' r' r) rT � s ztraps=[�))rm �varsr r� rn r )r. r� �namesr' r' r) r� � s zContext.__repr__c C s x| j D ]}d| j |< qW dS )zReset all flags to zeror% N)r )r. �flagr' r' r) rI � s zContext.clear_flagsc C s x| j D ]}d| j |< qW dS )zReset all traps to zeror% N)r )r. r� r' r' r) � clear_traps� s zContext.clear_trapsc
C s. t | j| j| j| j| j| j| j| j| j � }|S )z!Returns a shallow copy from self.)
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� }|S )z Returns a deep copy from self.) r r@ r? r" rA r� r� r rH r r� )r. r� r' r' r) rH � s
z Context.copyc G sZ t j||�}|| jkr(|� j| f|�� S d| j|< | j| sN|� j| f|�� S ||��dS )a# Handles an error
If the flag is in _ignored_flags, returns the default response.
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trap_enabler is set, it reraises the exception. Otherwise, it returns
the default value after setting the flag.
r- N)�_condition_map�getr� r0 r r )r. Z conditionZ explanationr( �errorr' r' r) rd � s
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| j t� S )z$Ignore all flags, if they are raised)�
_ignore_flagsr )r. r' r' r) r\ � s zContext._ignore_all_flagsc G s | j t|� | _ t|�S )z$Ignore the flags, if they are raised)r� rj )r. r r' r' r) r� � s zContext._ignore_flagsc G s< |r t |d ttf�r |d }x|D ]}| jj|� q$W dS )z+Stop ignoring the flags, if they are raisedr% N)r_ rk rj r� �remove)r. r r� r' r' r) �
_regard_flags� s
zContext._regard_flagsc C s t | j| j d �S )z!Returns Etiny (= Emin - prec + 1)r- )rU r" r@ )r. r' r' r) r� s z
Context.Etinyc C s t | j| j d �S )z,Returns maximum exponent (= Emax - prec + 1)r- )rU rA r@ )r. r' r' r) r� s z Context.Etopc C s | j }|| _ |S )a� Sets the rounding type.
Sets the rounding type, and returns the current (previous)
rounding type. Often used like:
context = context.copy()
# so you don't change the calling context
# if an error occurs in the middle.
rounding = context._set_rounding(ROUND_UP)
val = self.__sub__(other, context=context)
context._set_rounding(rounding)
This will make it round up for that operation.
)r? )r. rk r? r' r' r) r) s zContext._set_roundingrQ c C sj t |t�r*||j� ks d|kr*| jtd�S t|| d�}|j� r`t|j�| j | j
kr`| jtd�S |j | �S )z�Creates a new Decimal instance but using self as context.
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IBM Decimal specification.rR zAtrailing or leading whitespace and underscores are not permitted.)r/ z diagnostic info too long in NaN) r_ r` rb rd r r r� rf r8 r@ r� r� )r. rB r r' r' r) �create_decimal# s zContext.create_decimalc C s t j|�}|j| �S )a� Creates a new Decimal instance from a float but rounding using self
as the context.
>>> context = Context(prec=5, rounding=ROUND_DOWN)
>>> context.create_decimal_from_float(3.1415926535897932)
Decimal('3.1415')
>>> context = Context(prec=5, traps=[Inexact])
>>> context.create_decimal_from_float(3.1415926535897932)
Traceback (most recent call last):
...
decimal.Inexact: None
)r rq r� )r. r~ r r' r' r) �create_decimal_from_float4 s
z!Context.create_decimal_from_floatc C s t |dd�}|j| d�S )a[ Returns the absolute value of the operand.
If the operand is negative, the result is the same as using the minus
operation on the operand. Otherwise, the result is the same as using
the plus operation on the operand.
>>> ExtendedContext.abs(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.abs(Decimal('-100'))
Decimal('100')
>>> ExtendedContext.abs(Decimal('101.5'))
Decimal('101.5')
>>> ExtendedContext.abs(Decimal('-101.5'))
Decimal('101.5')
>>> ExtendedContext.abs(-1)
Decimal('1')
T)r� )r/ )r� r� )r. r r' r' r) rh F s z Context.absc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Return the sum of the two operands.
>>> ExtendedContext.add(Decimal('12'), Decimal('7.00'))
Decimal('19.00')
>>> ExtendedContext.add(Decimal('1E+2'), Decimal('1.01E+4'))
Decimal('1.02E+4')
>>> ExtendedContext.add(1, Decimal(2))
Decimal('3')
>>> ExtendedContext.add(Decimal(8), 5)
Decimal('13')
>>> ExtendedContext.add(5, 5)
Decimal('10')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �add[ s
z Context.addc C s t |j| ��S )N)r` r� )r. r r' r' r) �_applyp s zContext._applyc C s t |t�std��|j� S )z�Returns the same Decimal object.
As we do not have different encodings for the same number, the
received object already is in its canonical form.
>>> ExtendedContext.canonical(Decimal('2.50'))
Decimal('2.50')
z,canonical requires a Decimal as an argument.)r_ r rr r2 )r. r r' r' r) r2 s s
zContext.canonicalc C s t |dd�}|j|| d�S )a� Compares values numerically.
If the signs of the operands differ, a value representing each operand
('-1' if the operand is less than zero, '0' if the operand is zero or
negative zero, or '1' if the operand is greater than zero) is used in
place of that operand for the comparison instead of the actual
operand.
The comparison is then effected by subtracting the second operand from
the first and then returning a value according to the result of the
subtraction: '-1' if the result is less than zero, '0' if the result is
zero or negative zero, or '1' if the result is greater than zero.
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.1'))
Decimal('0')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.10'))
Decimal('0')
>>> ExtendedContext.compare(Decimal('3'), Decimal('2.1'))
Decimal('1')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('-3'))
Decimal('1')
>>> ExtendedContext.compare(Decimal('-3'), Decimal('2.1'))
Decimal('-1')
>>> ExtendedContext.compare(1, 2)
Decimal('-1')
>>> ExtendedContext.compare(Decimal(1), 2)
Decimal('-1')
>>> ExtendedContext.compare(1, Decimal(2))
Decimal('-1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s ! zContext.comparec C s t |dd�}|j|| d�S )a Compares the values of the two operands numerically.
It's pretty much like compare(), but all NaNs signal, with signaling
NaNs taking precedence over quiet NaNs.
>>> c = ExtendedContext
>>> c.compare_signal(Decimal('2.1'), Decimal('3'))
Decimal('-1')
>>> c.compare_signal(Decimal('2.1'), Decimal('2.1'))
Decimal('0')
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.compare_signal(Decimal('NaN'), Decimal('2.1'))
Decimal('NaN')
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.compare_signal(Decimal('sNaN'), Decimal('2.1'))
Decimal('NaN')
>>> print(c.flags[InvalidOperation])
1
>>> c.compare_signal(-1, 2)
Decimal('-1')
>>> c.compare_signal(Decimal(-1), 2)
Decimal('-1')
>>> c.compare_signal(-1, Decimal(2))
Decimal('-1')
T)r� )r/ )r� r3 )r. r rS r' r' r) r3 � s zContext.compare_signalc C s t |dd�}|j|�S )a+ Compares two operands using their abstract representation.
This is not like the standard compare, which use their numerical
value. Note that a total ordering is defined for all possible abstract
representations.
>>> ExtendedContext.compare_total(Decimal('12.73'), Decimal('127.9'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('-127'), Decimal('12'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('12.30'), Decimal('12.3'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('12.30'), Decimal('12.30'))
Decimal('0')
>>> ExtendedContext.compare_total(Decimal('12.3'), Decimal('12.300'))
Decimal('1')
>>> ExtendedContext.compare_total(Decimal('12.3'), Decimal('NaN'))
Decimal('-1')
>>> ExtendedContext.compare_total(1, 2)
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal(1), 2)
Decimal('-1')
>>> ExtendedContext.compare_total(1, Decimal(2))
Decimal('-1')
T)r� )r� r. )r. r rS r' r' r) r. � s zContext.compare_totalc C s t |dd�}|j|�S )z�Compares two operands using their abstract representation ignoring sign.
Like compare_total, but with operand's sign ignored and assumed to be 0.
T)r� )r� r7 )r. r rS r' r' r) r7 � s zContext.compare_total_magc C s t |dd�}|j� S )a Returns a copy of the operand with the sign set to 0.
>>> ExtendedContext.copy_abs(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.copy_abs(Decimal('-100'))
Decimal('100')
>>> ExtendedContext.copy_abs(-1)
Decimal('1')
T)r� )r� r� )r. r r' r' r) r� � s
zContext.copy_absc C s t |dd�}t|�S )a Returns a copy of the decimal object.
>>> ExtendedContext.copy_decimal(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.copy_decimal(Decimal('-1.00'))
Decimal('-1.00')
>>> ExtendedContext.copy_decimal(1)
Decimal('1')
T)r� )r� r )r. r r' r' r) � copy_decimal� s
zContext.copy_decimalc C s t |dd�}|j� S )a( Returns a copy of the operand with the sign inverted.
>>> ExtendedContext.copy_negate(Decimal('101.5'))
Decimal('-101.5')
>>> ExtendedContext.copy_negate(Decimal('-101.5'))
Decimal('101.5')
>>> ExtendedContext.copy_negate(1)
Decimal('-1')
T)r� )r� r� )r. r r' r' r) r� s
zContext.copy_negatec C s t |dd�}|j|�S )a Copies the second operand's sign to the first one.
In detail, it returns a copy of the first operand with the sign
equal to the sign of the second operand.
>>> ExtendedContext.copy_sign(Decimal( '1.50'), Decimal('7.33'))
Decimal('1.50')
>>> ExtendedContext.copy_sign(Decimal('-1.50'), Decimal('7.33'))
Decimal('1.50')
>>> ExtendedContext.copy_sign(Decimal( '1.50'), Decimal('-7.33'))
Decimal('-1.50')
>>> ExtendedContext.copy_sign(Decimal('-1.50'), Decimal('-7.33'))
Decimal('-1.50')
>>> ExtendedContext.copy_sign(1, -2)
Decimal('-1')
>>> ExtendedContext.copy_sign(Decimal(1), -2)
Decimal('-1')
>>> ExtendedContext.copy_sign(1, Decimal(-2))
Decimal('-1')
T)r� )r� r8 )r. r rS r' r' r) r8 s zContext.copy_signc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Decimal division in a specified context.
>>> ExtendedContext.divide(Decimal('1'), Decimal('3'))
Decimal('0.333333333')
>>> ExtendedContext.divide(Decimal('2'), Decimal('3'))
Decimal('0.666666667')
>>> ExtendedContext.divide(Decimal('5'), Decimal('2'))
Decimal('2.5')
>>> ExtendedContext.divide(Decimal('1'), Decimal('10'))
Decimal('0.1')
>>> ExtendedContext.divide(Decimal('12'), Decimal('12'))
Decimal('1')
>>> ExtendedContext.divide(Decimal('8.00'), Decimal('2'))
Decimal('4.00')
>>> ExtendedContext.divide(Decimal('2.400'), Decimal('2.0'))
Decimal('1.20')
>>> ExtendedContext.divide(Decimal('1000'), Decimal('100'))
Decimal('10')
>>> ExtendedContext.divide(Decimal('1000'), Decimal('1'))
Decimal('1000')
>>> ExtendedContext.divide(Decimal('2.40E+6'), Decimal('2'))
Decimal('1.20E+6')
>>> ExtendedContext.divide(5, 5)
Decimal('1')
>>> ExtendedContext.divide(Decimal(5), 5)
Decimal('1')
>>> ExtendedContext.divide(5, Decimal(5))
Decimal('1')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �divide+ s
zContext.dividec C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a/ Divides two numbers and returns the integer part of the result.
>>> ExtendedContext.divide_int(Decimal('2'), Decimal('3'))
Decimal('0')
>>> ExtendedContext.divide_int(Decimal('10'), Decimal('3'))
Decimal('3')
>>> ExtendedContext.divide_int(Decimal('1'), Decimal('0.3'))
Decimal('3')
>>> ExtendedContext.divide_int(10, 3)
Decimal('3')
>>> ExtendedContext.divide_int(Decimal(10), 3)
Decimal('3')
>>> ExtendedContext.divide_int(10, Decimal(3))
Decimal('3')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �
divide_intP s
zContext.divide_intc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Return (a // b, a % b).
>>> ExtendedContext.divmod(Decimal(8), Decimal(3))
(Decimal('2'), Decimal('2'))
>>> ExtendedContext.divmod(Decimal(8), Decimal(4))
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(8, 4)
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(Decimal(8), 4)
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(8, Decimal(4))
(Decimal('2'), Decimal('0'))
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) r� g s
zContext.divmodc C s t |dd�}|j| d�S )a# Returns e ** a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.exp(Decimal('-Infinity'))
Decimal('0')
>>> c.exp(Decimal('-1'))
Decimal('0.367879441')
>>> c.exp(Decimal('0'))
Decimal('1')
>>> c.exp(Decimal('1'))
Decimal('2.71828183')
>>> c.exp(Decimal('0.693147181'))
Decimal('2.00000000')
>>> c.exp(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.exp(10)
Decimal('22026.4658')
T)r� )r/ )r� rV )r. r r' r' r) rV | s z Context.expc C s t |dd�}|j||| d�S )a Returns a multiplied by b, plus c.
The first two operands are multiplied together, using multiply,
the third operand is then added to the result of that
multiplication, using add, all with only one final rounding.
>>> ExtendedContext.fma(Decimal('3'), Decimal('5'), Decimal('7'))
Decimal('22')
>>> ExtendedContext.fma(Decimal('3'), Decimal('-5'), Decimal('7'))
Decimal('-8')
>>> ExtendedContext.fma(Decimal('888565290'), Decimal('1557.96930'), Decimal('-86087.7578'))
Decimal('1.38435736E+12')
>>> ExtendedContext.fma(1, 3, 4)
Decimal('7')
>>> ExtendedContext.fma(1, Decimal(3), 4)
Decimal('7')
>>> ExtendedContext.fma(1, 3, Decimal(4))
Decimal('7')
T)r� )r/ )r� r� )r. r rS r+ r' r' r) r� � s z Context.fmac C s t |t�std��|j� S )a Return True if the operand is canonical; otherwise return False.
Currently, the encoding of a Decimal instance is always
canonical, so this method returns True for any Decimal.
>>> ExtendedContext.is_canonical(Decimal('2.50'))
True
z/is_canonical requires a Decimal as an argument.)r_ r rr r; )r. r r' r' r) r; � s
zContext.is_canonicalc C s t |dd�}|j� S )a, Return True if the operand is finite; otherwise return False.
A Decimal instance is considered finite if it is neither
infinite nor a NaN.
>>> ExtendedContext.is_finite(Decimal('2.50'))
True
>>> ExtendedContext.is_finite(Decimal('-0.3'))
True
>>> ExtendedContext.is_finite(Decimal('0'))
True
>>> ExtendedContext.is_finite(Decimal('Inf'))
False
>>> ExtendedContext.is_finite(Decimal('NaN'))
False
>>> ExtendedContext.is_finite(1)
True
T)r� )r� r< )r. r r' r' r) r< � s zContext.is_finitec C s t |dd�}|j� S )aU Return True if the operand is infinite; otherwise return False.
>>> ExtendedContext.is_infinite(Decimal('2.50'))
False
>>> ExtendedContext.is_infinite(Decimal('-Inf'))
True
>>> ExtendedContext.is_infinite(Decimal('NaN'))
False
>>> ExtendedContext.is_infinite(1)
False
T)r� )r� r# )r. r r' r' r) r# � s zContext.is_infinitec C s t |dd�}|j� S )aO Return True if the operand is a qNaN or sNaN;
otherwise return False.
>>> ExtendedContext.is_nan(Decimal('2.50'))
False
>>> ExtendedContext.is_nan(Decimal('NaN'))
True
>>> ExtendedContext.is_nan(Decimal('-sNaN'))
True
>>> ExtendedContext.is_nan(1)
False
T)r� )r� r� )r. r r' r' r) r� � s
zContext.is_nanc C s t |dd�}|j| d�S )a� Return True if the operand is a normal number;
otherwise return False.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.is_normal(Decimal('2.50'))
True
>>> c.is_normal(Decimal('0.1E-999'))
False
>>> c.is_normal(Decimal('0.00'))
False
>>> c.is_normal(Decimal('-Inf'))
False
>>> c.is_normal(Decimal('NaN'))
False
>>> c.is_normal(1)
True
T)r� )r/ )r� r= )r. r r' r' r) r= � s zContext.is_normalc C s t |dd�}|j� S )aH Return True if the operand is a quiet NaN; otherwise return False.
>>> ExtendedContext.is_qnan(Decimal('2.50'))
False
>>> ExtendedContext.is_qnan(Decimal('NaN'))
True
>>> ExtendedContext.is_qnan(Decimal('sNaN'))
False
>>> ExtendedContext.is_qnan(1)
False
T)r� )r� r� )r. r r' r' r) r� s zContext.is_qnanc C s t |dd�}|j� S )a� Return True if the operand is negative; otherwise return False.
>>> ExtendedContext.is_signed(Decimal('2.50'))
False
>>> ExtendedContext.is_signed(Decimal('-12'))
True
>>> ExtendedContext.is_signed(Decimal('-0'))
True
>>> ExtendedContext.is_signed(8)
False
>>> ExtendedContext.is_signed(-8)
True
T)r� )r� r> )r. r r' r' r) r> s zContext.is_signedc C s t |dd�}|j� S )aT Return True if the operand is a signaling NaN;
otherwise return False.
>>> ExtendedContext.is_snan(Decimal('2.50'))
False
>>> ExtendedContext.is_snan(Decimal('NaN'))
False
>>> ExtendedContext.is_snan(Decimal('sNaN'))
True
>>> ExtendedContext.is_snan(1)
False
T)r� )r� r� )r. r r' r' r) r� $ s
zContext.is_snanc C s t |dd�}|j| d�S )a� Return True if the operand is subnormal; otherwise return False.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.is_subnormal(Decimal('2.50'))
False
>>> c.is_subnormal(Decimal('0.1E-999'))
True
>>> c.is_subnormal(Decimal('0.00'))
False
>>> c.is_subnormal(Decimal('-Inf'))
False
>>> c.is_subnormal(Decimal('NaN'))
False
>>> c.is_subnormal(1)
False
T)r� )r/ )r� r? )r. r r' r' r) r? 4 s zContext.is_subnormalc C s t |dd�}|j� S )au Return True if the operand is a zero; otherwise return False.
>>> ExtendedContext.is_zero(Decimal('0'))
True
>>> ExtendedContext.is_zero(Decimal('2.50'))
False
>>> ExtendedContext.is_zero(Decimal('-0E+2'))
True
>>> ExtendedContext.is_zero(1)
False
>>> ExtendedContext.is_zero(0)
True
T)r� )r� r@ )r. r r' r' r) r@ J s zContext.is_zeroc C s t |dd�}|j| d�S )a� Returns the natural (base e) logarithm of the operand.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.ln(Decimal('0'))
Decimal('-Infinity')
>>> c.ln(Decimal('1.000'))
Decimal('0')
>>> c.ln(Decimal('2.71828183'))
Decimal('1.00000000')
>>> c.ln(Decimal('10'))
Decimal('2.30258509')
>>> c.ln(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.ln(1)
Decimal('0')
T)r� )r/ )r� rH )r. r r' r' r) rH [ s z
Context.lnc C s t |dd�}|j| d�S )a� Returns the base 10 logarithm of the operand.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.log10(Decimal('0'))
Decimal('-Infinity')
>>> c.log10(Decimal('0.001'))
Decimal('-3')
>>> c.log10(Decimal('1.000'))
Decimal('0')
>>> c.log10(Decimal('2'))
Decimal('0.301029996')
>>> c.log10(Decimal('10'))
Decimal('1')
>>> c.log10(Decimal('70'))
Decimal('1.84509804')
>>> c.log10(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.log10(0)
Decimal('-Infinity')
>>> c.log10(1)
Decimal('0')
T)r� )r/ )r� rK )r. r r' r' r) rK q s z
Context.log10c C s t |dd�}|j| d�S )a4 Returns the exponent of the magnitude of the operand's MSD.
The result is the integer which is the exponent of the magnitude
of the most significant digit of the operand (as though the
operand were truncated to a single digit while maintaining the
value of that digit and without limiting the resulting exponent).
>>> ExtendedContext.logb(Decimal('250'))
Decimal('2')
>>> ExtendedContext.logb(Decimal('2.50'))
Decimal('0')
>>> ExtendedContext.logb(Decimal('0.03'))
Decimal('-2')
>>> ExtendedContext.logb(Decimal('0'))
Decimal('-Infinity')
>>> ExtendedContext.logb(1)
Decimal('0')
>>> ExtendedContext.logb(10)
Decimal('1')
>>> ExtendedContext.logb(100)
Decimal('2')
T)r� )r/ )r� rL )r. r r' r' r) rL � s z Context.logbc C s t |dd�}|j|| d�S )a� Applies the logical operation 'and' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_and(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('0'), Decimal('1'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('1'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('1'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_and(Decimal('1100'), Decimal('1010'))
Decimal('1000')
>>> ExtendedContext.logical_and(Decimal('1111'), Decimal('10'))
Decimal('10')
>>> ExtendedContext.logical_and(110, 1101)
Decimal('100')
>>> ExtendedContext.logical_and(Decimal(110), 1101)
Decimal('100')
>>> ExtendedContext.logical_and(110, Decimal(1101))
Decimal('100')
T)r� )r/ )r� rV )r. r rS r' r' r) rV � s zContext.logical_andc C s t |dd�}|j| d�S )a Invert all the digits in the operand.
The operand must be a logical number.
>>> ExtendedContext.logical_invert(Decimal('0'))
Decimal('111111111')
>>> ExtendedContext.logical_invert(Decimal('1'))
Decimal('111111110')
>>> ExtendedContext.logical_invert(Decimal('111111111'))
Decimal('0')
>>> ExtendedContext.logical_invert(Decimal('101010101'))
Decimal('10101010')
>>> ExtendedContext.logical_invert(1101)
Decimal('111110010')
T)r� )r/ )r� rX )r. r r' r' r) rX � s zContext.logical_invertc C s t |dd�}|j|| d�S )a� Applies the logical operation 'or' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_or(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_or(Decimal('0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1'), Decimal('0'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1100'), Decimal('1010'))
Decimal('1110')
>>> ExtendedContext.logical_or(Decimal('1110'), Decimal('10'))
Decimal('1110')
>>> ExtendedContext.logical_or(110, 1101)
Decimal('1111')
>>> ExtendedContext.logical_or(Decimal(110), 1101)
Decimal('1111')
>>> ExtendedContext.logical_or(110, Decimal(1101))
Decimal('1111')
T)r� )r/ )r� rY )r. r rS r' r' r) rY � s zContext.logical_orc C s t |dd�}|j|| d�S )a� Applies the logical operation 'xor' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_xor(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_xor(Decimal('0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_xor(Decimal('1'), Decimal('0'))
Decimal('1')
>>> ExtendedContext.logical_xor(Decimal('1'), Decimal('1'))
Decimal('0')
>>> ExtendedContext.logical_xor(Decimal('1100'), Decimal('1010'))
Decimal('110')
>>> ExtendedContext.logical_xor(Decimal('1111'), Decimal('10'))
Decimal('1101')
>>> ExtendedContext.logical_xor(110, 1101)
Decimal('1011')
>>> ExtendedContext.logical_xor(Decimal(110), 1101)
Decimal('1011')
>>> ExtendedContext.logical_xor(110, Decimal(1101))
Decimal('1011')
T)r� )r/ )r� rW )r. r rS r' r' r) rW � s zContext.logical_xorc C s t |dd�}|j|| d�S )a� max compares two values numerically and returns the maximum.
If either operand is a NaN then the general rules apply.
Otherwise, the operands are compared as though by the compare
operation. If they are numerically equal then the left-hand operand
is chosen as the result. Otherwise the maximum (closer to positive
infinity) of the two operands is chosen as the result.
>>> ExtendedContext.max(Decimal('3'), Decimal('2'))
Decimal('3')
>>> ExtendedContext.max(Decimal('-10'), Decimal('3'))
Decimal('3')
>>> ExtendedContext.max(Decimal('1.0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.max(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.max(1, 2)
Decimal('2')
>>> ExtendedContext.max(Decimal(1), 2)
Decimal('2')
>>> ExtendedContext.max(1, Decimal(2))
Decimal('2')
T)r� )r/ )r� r� )r. r rS r' r' r) r� s z Context.maxc C s t |dd�}|j|| d�S )a� Compares the values numerically with their sign ignored.
>>> ExtendedContext.max_mag(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.max_mag(Decimal('7'), Decimal('-10'))
Decimal('-10')
>>> ExtendedContext.max_mag(1, -2)
Decimal('-2')
>>> ExtendedContext.max_mag(Decimal(1), -2)
Decimal('-2')
>>> ExtendedContext.max_mag(1, Decimal(-2))
Decimal('-2')
T)r� )r/ )r� rZ )r. r rS r' r' r) rZ & s zContext.max_magc C s t |dd�}|j|| d�S )a� min compares two values numerically and returns the minimum.
If either operand is a NaN then the general rules apply.
Otherwise, the operands are compared as though by the compare
operation. If they are numerically equal then the left-hand operand
is chosen as the result. Otherwise the minimum (closer to negative
infinity) of the two operands is chosen as the result.
>>> ExtendedContext.min(Decimal('3'), Decimal('2'))
Decimal('2')
>>> ExtendedContext.min(Decimal('-10'), Decimal('3'))
Decimal('-10')
>>> ExtendedContext.min(Decimal('1.0'), Decimal('1'))
Decimal('1.0')
>>> ExtendedContext.min(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.min(1, 2)
Decimal('1')
>>> ExtendedContext.min(Decimal(1), 2)
Decimal('1')
>>> ExtendedContext.min(1, Decimal(29))
Decimal('1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� 7 s z Context.minc C s t |dd�}|j|| d�S )a� Compares the values numerically with their sign ignored.
>>> ExtendedContext.min_mag(Decimal('3'), Decimal('-2'))
Decimal('-2')
>>> ExtendedContext.min_mag(Decimal('-3'), Decimal('NaN'))
Decimal('-3')
>>> ExtendedContext.min_mag(1, -2)
Decimal('1')
>>> ExtendedContext.min_mag(Decimal(1), -2)
Decimal('1')
>>> ExtendedContext.min_mag(1, Decimal(-2))
Decimal('1')
T)r� )r/ )r� r[ )r. r rS r' r' r) r[ R s zContext.min_magc C s t |dd�}|j| d�S )a� Minus corresponds to unary prefix minus in Python.
The operation is evaluated using the same rules as subtract; the
operation minus(a) is calculated as subtract('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedContext.minus(Decimal('1.3'))
Decimal('-1.3')
>>> ExtendedContext.minus(Decimal('-1.3'))
Decimal('1.3')
>>> ExtendedContext.minus(1)
Decimal('-1')
T)r� )r/ )r� r� )r. r r' r' r) �minusc s z
Context.minusc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� multiply multiplies two operands.
If either operand is a special value then the general rules apply.
Otherwise, the operands are multiplied together
('long multiplication'), resulting in a number which may be as long as
the sum of the lengths of the two operands.
>>> ExtendedContext.multiply(Decimal('1.20'), Decimal('3'))
Decimal('3.60')
>>> ExtendedContext.multiply(Decimal('7'), Decimal('3'))
Decimal('21')
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('0.8'))
Decimal('0.72')
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('-0'))
Decimal('-0.0')
>>> ExtendedContext.multiply(Decimal('654321'), Decimal('654321'))
Decimal('4.28135971E+11')
>>> ExtendedContext.multiply(7, 7)
Decimal('49')
>>> ExtendedContext.multiply(Decimal(7), 7)
Decimal('49')
>>> ExtendedContext.multiply(7, Decimal(7))
Decimal('49')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �multiplyt s
zContext.multiplyc C s t |dd�}|j| d�S )a" Returns the largest representable number smaller than a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> ExtendedContext.next_minus(Decimal('1'))
Decimal('0.999999999')
>>> c.next_minus(Decimal('1E-1007'))
Decimal('0E-1007')
>>> ExtendedContext.next_minus(Decimal('-1.00000003'))
Decimal('-1.00000004')
>>> c.next_minus(Decimal('Infinity'))
Decimal('9.99999999E+999')
>>> c.next_minus(1)
Decimal('0.999999999')
T)r� )r/ )r� r^ )r. r r' r' r) r^ � s zContext.next_minusc C s t |dd�}|j| d�S )a Returns the smallest representable number larger than a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> ExtendedContext.next_plus(Decimal('1'))
Decimal('1.00000001')
>>> c.next_plus(Decimal('-1E-1007'))
Decimal('-0E-1007')
>>> ExtendedContext.next_plus(Decimal('-1.00000003'))
Decimal('-1.00000002')
>>> c.next_plus(Decimal('-Infinity'))
Decimal('-9.99999999E+999')
>>> c.next_plus(1)
Decimal('1.00000001')
T)r� )r/ )r� r_ )r. r r' r' r) r_ � s zContext.next_plusc C s t |dd�}|j|| d�S )a� Returns the number closest to a, in direction towards b.
The result is the closest representable number from the first
operand (but not the first operand) that is in the direction
towards the second operand, unless the operands have the same
value.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.next_toward(Decimal('1'), Decimal('2'))
Decimal('1.00000001')
>>> c.next_toward(Decimal('-1E-1007'), Decimal('1'))
Decimal('-0E-1007')
>>> c.next_toward(Decimal('-1.00000003'), Decimal('0'))
Decimal('-1.00000002')
>>> c.next_toward(Decimal('1'), Decimal('0'))
Decimal('0.999999999')
>>> c.next_toward(Decimal('1E-1007'), Decimal('-100'))
Decimal('0E-1007')
>>> c.next_toward(Decimal('-1.00000003'), Decimal('-10'))
Decimal('-1.00000004')
>>> c.next_toward(Decimal('0.00'), Decimal('-0.0000'))
Decimal('-0.00')
>>> c.next_toward(0, 1)
Decimal('1E-1007')
>>> c.next_toward(Decimal(0), 1)
Decimal('1E-1007')
>>> c.next_toward(0, Decimal(1))
Decimal('1E-1007')
T)r� )r/ )r� r` )r. r rS r' r' r) r` � s zContext.next_towardc C s t |dd�}|j| d�S )a� normalize reduces an operand to its simplest form.
Essentially a plus operation with all trailing zeros removed from the
result.
>>> ExtendedContext.normalize(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.normalize(Decimal('-2.0'))
Decimal('-2')
>>> ExtendedContext.normalize(Decimal('1.200'))
Decimal('1.2')
>>> ExtendedContext.normalize(Decimal('-120'))
Decimal('-1.2E+2')
>>> ExtendedContext.normalize(Decimal('120.00'))
Decimal('1.2E+2')
>>> ExtendedContext.normalize(Decimal('0.00'))
Decimal('0')
>>> ExtendedContext.normalize(6)
Decimal('6')
T)r� )r/ )r� r! )r. r r' r' r) r! � s zContext.normalizec C s t |dd�}|j| d�S )a� Returns an indication of the class of the operand.
The class is one of the following strings:
-sNaN
-NaN
-Infinity
-Normal
-Subnormal
-Zero
+Zero
+Subnormal
+Normal
+Infinity
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.number_class(Decimal('Infinity'))
'+Infinity'
>>> c.number_class(Decimal('1E-10'))
'+Normal'
>>> c.number_class(Decimal('2.50'))
'+Normal'
>>> c.number_class(Decimal('0.1E-999'))
'+Subnormal'
>>> c.number_class(Decimal('0'))
'+Zero'
>>> c.number_class(Decimal('-0'))
'-Zero'
>>> c.number_class(Decimal('-0.1E-999'))
'-Subnormal'
>>> c.number_class(Decimal('-1E-10'))
'-Normal'
>>> c.number_class(Decimal('-2.50'))
'-Normal'
>>> c.number_class(Decimal('-Infinity'))
'-Infinity'
>>> c.number_class(Decimal('NaN'))
'NaN'
>>> c.number_class(Decimal('-NaN'))
'NaN'
>>> c.number_class(Decimal('sNaN'))
'sNaN'
>>> c.number_class(123)
'+Normal'
T)r� )r/ )r� rb )r. r r' r' r) rb � s / zContext.number_classc C s t |dd�}|j| d�S )a� Plus corresponds to unary prefix plus in Python.
The operation is evaluated using the same rules as add; the
operation plus(a) is calculated as add('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedContext.plus(Decimal('1.3'))
Decimal('1.3')
>>> ExtendedContext.plus(Decimal('-1.3'))
Decimal('-1.3')
>>> ExtendedContext.plus(-1)
Decimal('-1')
T)r� )r/ )r� r� )r. r r' r' r) �plus) s z Context.plusc C s: t |dd�}|j||| d�}|tkr2td| ��n|S dS )a Raises a to the power of b, to modulo if given.
With two arguments, compute a**b. If a is negative then b
must be integral. The result will be inexact unless b is
integral and the result is finite and can be expressed exactly
in 'precision' digits.
With three arguments, compute (a**b) % modulo. For the
three argument form, the following restrictions on the
arguments hold:
- all three arguments must be integral
- b must be nonnegative
- at least one of a or b must be nonzero
- modulo must be nonzero and have at most 'precision' digits
The result of pow(a, b, modulo) is identical to the result
that would be obtained by computing (a**b) % modulo with
unbounded precision, but is computed more efficiently. It is
always exact.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.power(Decimal('2'), Decimal('3'))
Decimal('8')
>>> c.power(Decimal('-2'), Decimal('3'))
Decimal('-8')
>>> c.power(Decimal('2'), Decimal('-3'))
Decimal('0.125')
>>> c.power(Decimal('1.7'), Decimal('8'))
Decimal('69.7575744')
>>> c.power(Decimal('10'), Decimal('0.301029996'))
Decimal('2.00000000')
>>> c.power(Decimal('Infinity'), Decimal('-1'))
Decimal('0')
>>> c.power(Decimal('Infinity'), Decimal('0'))
Decimal('1')
>>> c.power(Decimal('Infinity'), Decimal('1'))
Decimal('Infinity')
>>> c.power(Decimal('-Infinity'), Decimal('-1'))
Decimal('-0')
>>> c.power(Decimal('-Infinity'), Decimal('0'))
Decimal('1')
>>> c.power(Decimal('-Infinity'), Decimal('1'))
Decimal('-Infinity')
>>> c.power(Decimal('-Infinity'), Decimal('2'))
Decimal('Infinity')
>>> c.power(Decimal('0'), Decimal('0'))
Decimal('NaN')
>>> c.power(Decimal('3'), Decimal('7'), Decimal('16'))
Decimal('11')
>>> c.power(Decimal('-3'), Decimal('7'), Decimal('16'))
Decimal('-11')
>>> c.power(Decimal('-3'), Decimal('8'), Decimal('16'))
Decimal('1')
>>> c.power(Decimal('3'), Decimal('7'), Decimal('-16'))
Decimal('11')
>>> c.power(Decimal('23E12345'), Decimal('67E189'), Decimal('123456789'))
Decimal('11729830')
>>> c.power(Decimal('-0'), Decimal('17'), Decimal('1729'))
Decimal('-0')
>>> c.power(Decimal('-23'), Decimal('0'), Decimal('65537'))
Decimal('1')
>>> ExtendedContext.power(7, 7)
Decimal('823543')
>>> ExtendedContext.power(Decimal(7), 7)
Decimal('823543')
>>> ExtendedContext.power(7, Decimal(7), 2)
Decimal('1')
T)r� )r/ z Unable to convert %s to DecimalN)r� r r� rr )r. r rS r� r� r' r' r) �power: s
I z
Context.powerc C s t |dd�}|j|| d�S )a
Returns a value equal to 'a' (rounded), having the exponent of 'b'.
The coefficient of the result is derived from that of the left-hand
operand. It may be rounded using the current rounding setting (if the
exponent is being increased), multiplied by a positive power of ten (if
the exponent is being decreased), or is unchanged (if the exponent is
already equal to that of the right-hand operand).
Unlike other operations, if the length of the coefficient after the
quantize operation would be greater than precision then an Invalid
operation condition is raised. This guarantees that, unless there is
an error condition, the exponent of the result of a quantize is always
equal to that of the right-hand operand.
Also unlike other operations, quantize will never raise Underflow, even
if the result is subnormal and inexact.
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.001'))
Decimal('2.170')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.01'))
Decimal('2.17')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.1'))
Decimal('2.2')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+0'))
Decimal('2')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+1'))
Decimal('0E+1')
>>> ExtendedContext.quantize(Decimal('-Inf'), Decimal('Infinity'))
Decimal('-Infinity')
>>> ExtendedContext.quantize(Decimal('2'), Decimal('Infinity'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('-0.1'), Decimal('1'))
Decimal('-0')
>>> ExtendedContext.quantize(Decimal('-0'), Decimal('1e+5'))
Decimal('-0E+5')
>>> ExtendedContext.quantize(Decimal('+35236450.6'), Decimal('1e-2'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('-35236450.6'), Decimal('1e-2'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-1'))
Decimal('217.0')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-0'))
Decimal('217')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+1'))
Decimal('2.2E+2')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+2'))
Decimal('2E+2')
>>> ExtendedContext.quantize(1, 2)
Decimal('1')
>>> ExtendedContext.quantize(Decimal(1), 2)
Decimal('1')
>>> ExtendedContext.quantize(1, Decimal(2))
Decimal('1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s 7 zContext.quantizec C s t d�S )zkJust returns 10, as this is Decimal, :)
>>> ExtendedContext.radix()
Decimal('10')
r� )r )r. r' r' r) rc � s z
Context.radixc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a Returns the remainder from integer division.
The result is the residue of the dividend after the operation of
calculating integer division as described for divide-integer, rounded
to precision digits if necessary. The sign of the result, if
non-zero, is the same as that of the original dividend.
This operation will fail under the same conditions as integer division
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedContext.remainder(Decimal('2.1'), Decimal('3'))
Decimal('2.1')
>>> ExtendedContext.remainder(Decimal('10'), Decimal('3'))
Decimal('1')
>>> ExtendedContext.remainder(Decimal('-10'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.remainder(Decimal('10.2'), Decimal('1'))
Decimal('0.2')
>>> ExtendedContext.remainder(Decimal('10'), Decimal('0.3'))
Decimal('0.1')
>>> ExtendedContext.remainder(Decimal('3.6'), Decimal('1.3'))
Decimal('1.0')
>>> ExtendedContext.remainder(22, 6)
Decimal('4')
>>> ExtendedContext.remainder(Decimal(22), 6)
Decimal('4')
>>> ExtendedContext.remainder(22, Decimal(6))
Decimal('4')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) r� � s
zContext.remainderc C s t |dd�}|j|| d�S )aG Returns to be "a - b * n", where n is the integer nearest the exact
value of "x / b" (if two integers are equally near then the even one
is chosen). If the result is equal to 0 then its sign will be the
sign of a.
This operation will fail under the same conditions as integer division
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedContext.remainder_near(Decimal('2.1'), Decimal('3'))
Decimal('-0.9')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('6'))
Decimal('-2')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('3'))
Decimal('1')
>>> ExtendedContext.remainder_near(Decimal('-10'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.remainder_near(Decimal('10.2'), Decimal('1'))
Decimal('0.2')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('0.3'))
Decimal('0.1')
>>> ExtendedContext.remainder_near(Decimal('3.6'), Decimal('1.3'))
Decimal('-0.3')
>>> ExtendedContext.remainder_near(3, 11)
Decimal('3')
>>> ExtendedContext.remainder_near(Decimal(3), 11)
Decimal('3')
>>> ExtendedContext.remainder_near(3, Decimal(11))
Decimal('3')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s zContext.remainder_nearc C s t |dd�}|j|| d�S )aN Returns a rotated copy of a, b times.
The coefficient of the result is a rotated copy of the digits in
the coefficient of the first operand. The number of places of
rotation is taken from the absolute value of the second operand,
with the rotation being to the left if the second operand is
positive or to the right otherwise.
>>> ExtendedContext.rotate(Decimal('34'), Decimal('8'))
Decimal('400000003')
>>> ExtendedContext.rotate(Decimal('12'), Decimal('9'))
Decimal('12')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('-2'))
Decimal('891234567')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('0'))
Decimal('123456789')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('+2'))
Decimal('345678912')
>>> ExtendedContext.rotate(1333333, 1)
Decimal('13333330')
>>> ExtendedContext.rotate(Decimal(1333333), 1)
Decimal('13333330')
>>> ExtendedContext.rotate(1333333, Decimal(1))
Decimal('13333330')
T)r� )r/ )r� rg )r. r rS r' r' r) rg s zContext.rotatec C s t |dd�}|j|�S )a� Returns True if the two operands have the same exponent.
The result is never affected by either the sign or the coefficient of
either operand.
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.001'))
False
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.01'))
True
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('1'))
False
>>> ExtendedContext.same_quantum(Decimal('Inf'), Decimal('-Inf'))
True
>>> ExtendedContext.same_quantum(10000, -1)
True
>>> ExtendedContext.same_quantum(Decimal(10000), -1)
True
>>> ExtendedContext.same_quantum(10000, Decimal(-1))
True
T)r� )r� r$ )r. r rS r' r' r) r$ 1 s zContext.same_quantumc C s t |dd�}|j|| d�S )a3 Returns the first operand after adding the second value its exp.
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('-2'))
Decimal('0.0750')
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('0'))
Decimal('7.50')
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('3'))
Decimal('7.50E+3')
>>> ExtendedContext.scaleb(1, 4)
Decimal('1E+4')
>>> ExtendedContext.scaleb(Decimal(1), 4)
Decimal('1E+4')
>>> ExtendedContext.scaleb(1, Decimal(4))
Decimal('1E+4')
T)r� )r/ )r� rh )r. r rS r' r' r) rh I s zContext.scalebc C s t |dd�}|j|| d�S )a{ Returns a shifted copy of a, b times.
The coefficient of the result is a shifted copy of the digits
in the coefficient of the first operand. The number of places
to shift is taken from the absolute value of the second operand,
with the shift being to the left if the second operand is
positive or to the right otherwise. Digits shifted into the
coefficient are zeros.
>>> ExtendedContext.shift(Decimal('34'), Decimal('8'))
Decimal('400000000')
>>> ExtendedContext.shift(Decimal('12'), Decimal('9'))
Decimal('0')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('-2'))
Decimal('1234567')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('0'))
Decimal('123456789')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('+2'))
Decimal('345678900')
>>> ExtendedContext.shift(88888888, 2)
Decimal('888888800')
>>> ExtendedContext.shift(Decimal(88888888), 2)
Decimal('888888800')
>>> ExtendedContext.shift(88888888, Decimal(2))
Decimal('888888800')
T)r� )r/ )r� r� )r. r rS r' r' r) r� \ s z
Context.shiftc C s t |dd�}|j| d�S )a� Square root of a non-negative number to context precision.
If the result must be inexact, it is rounded using the round-half-even
algorithm.
>>> ExtendedContext.sqrt(Decimal('0'))
Decimal('0')
>>> ExtendedContext.sqrt(Decimal('-0'))
Decimal('-0')
>>> ExtendedContext.sqrt(Decimal('0.39'))
Decimal('0.624499800')
>>> ExtendedContext.sqrt(Decimal('100'))
Decimal('10')
>>> ExtendedContext.sqrt(Decimal('1'))
Decimal('1')
>>> ExtendedContext.sqrt(Decimal('1.0'))
Decimal('1.0')
>>> ExtendedContext.sqrt(Decimal('1.00'))
Decimal('1.0')
>>> ExtendedContext.sqrt(Decimal('7'))
Decimal('2.64575131')
>>> ExtendedContext.sqrt(Decimal('10'))
Decimal('3.16227766')
>>> ExtendedContext.sqrt(2)
Decimal('1.41421356')
>>> ExtendedContext.prec
9
T)r� )r/ )r� r- )r. r r' r' r) r- z s z Context.sqrtc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a& Return the difference between the two operands.
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.07'))
Decimal('0.23')
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.30'))
Decimal('0.00')
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('2.07'))
Decimal('-0.77')
>>> ExtendedContext.subtract(8, 5)
Decimal('3')
>>> ExtendedContext.subtract(Decimal(8), 5)
Decimal('3')
>>> ExtendedContext.subtract(8, Decimal(5))
Decimal('3')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �subtract� s
zContext.subtractc C s t |dd�}|j| d�S )a� Convert to a string, using engineering notation if an exponent is needed.
Engineering notation has an exponent which is a multiple of 3. This
can leave up to 3 digits to the left of the decimal place and may
require the addition of either one or two trailing zeros.
The operation is not affected by the context.
>>> ExtendedContext.to_eng_string(Decimal('123E+1'))
'1.23E+3'
>>> ExtendedContext.to_eng_string(Decimal('123E+3'))
'123E+3'
>>> ExtendedContext.to_eng_string(Decimal('123E-10'))
'12.3E-9'
>>> ExtendedContext.to_eng_string(Decimal('-123E-12'))
'-123E-12'
>>> ExtendedContext.to_eng_string(Decimal('7E-7'))
'700E-9'
>>> ExtendedContext.to_eng_string(Decimal('7E+1'))
'70'
>>> ExtendedContext.to_eng_string(Decimal('0E+1'))
'0.00E+3'
T)r� )r/ )r� r� )r. r r' r' r) r� � s zContext.to_eng_stringc C s t |dd�}|j| d�S )zyConverts a number to a string, using scientific notation.
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T)r� )r/ )r� r� )r. r r' r' r) �
to_sci_string� s zContext.to_sci_stringc C s t |dd�}|j| d�S )ak Rounds to an integer.
When the operand has a negative exponent, the result is the same
as using the quantize() operation using the given operand as the
left-hand-operand, 1E+0 as the right-hand-operand, and the precision
of the operand as the precision setting; Inexact and Rounded flags
are allowed in this operation. The rounding mode is taken from the
context.
>>> ExtendedContext.to_integral_exact(Decimal('2.1'))
Decimal('2')
>>> ExtendedContext.to_integral_exact(Decimal('100'))
Decimal('100')
>>> ExtendedContext.to_integral_exact(Decimal('100.0'))
Decimal('100')
>>> ExtendedContext.to_integral_exact(Decimal('101.5'))
Decimal('102')
>>> ExtendedContext.to_integral_exact(Decimal('-101.5'))
Decimal('-102')
>>> ExtendedContext.to_integral_exact(Decimal('10E+5'))
Decimal('1.0E+6')
>>> ExtendedContext.to_integral_exact(Decimal('7.89E+77'))
Decimal('7.89E+77')
>>> ExtendedContext.to_integral_exact(Decimal('-Inf'))
Decimal('-Infinity')
T)r� )r/ )r� r' )r. r r' r' r) r' � s zContext.to_integral_exactc C s t |dd�}|j| d�S )aL Rounds to an integer.
When the operand has a negative exponent, the result is the same
as using the quantize() operation using the given operand as the
left-hand-operand, 1E+0 as the right-hand-operand, and the precision
of the operand as the precision setting, except that no flags will
be set. The rounding mode is taken from the context.
>>> ExtendedContext.to_integral_value(Decimal('2.1'))
Decimal('2')
>>> ExtendedContext.to_integral_value(Decimal('100'))
Decimal('100')
>>> ExtendedContext.to_integral_value(Decimal('100.0'))
Decimal('100')
>>> ExtendedContext.to_integral_value(Decimal('101.5'))
Decimal('102')
>>> ExtendedContext.to_integral_value(Decimal('-101.5'))
Decimal('-102')
>>> ExtendedContext.to_integral_value(Decimal('10E+5'))
Decimal('1.0E+6')
>>> ExtendedContext.to_integral_value(Decimal('7.89E+77'))
Decimal('7.89E+77')
>>> ExtendedContext.to_integral_value(Decimal('-Inf'))
Decimal('-Infinity')
T)r� )r/ )r� r� )r. r r' r' r) r� � s zContext.to_integral_value) NNNNNNNNN)N)rQ )N)Xr1 r2 r3 r4 r� r� r� r� r� rj r� rI r� r( rH rl rd r\ r� r� r� r� r� r) r� r� rh r� r� r2 r� r3 r. r7 r� r� r� r8 r� r� r� rV r� r; r< r# r� r= r� r> r� r? r@ rH rK rL rV rX rY rW r� rZ r� r[ r� r� r^ r_ r` r! rb r� r� r� rc r� r� rg r$ rh r� r- r� r� r� r' r� r� r' r' r' r) r B s�
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ri c C s� | j |j k r|}| }n| }|}tt|j��}tt|j��}|j td|| d � }||j d |k rpd|_||_ | jd|j |j 9 _|j |_ | |fS )zcNormalizes op1, op2 to have the same exp and length of coefficient.
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r- r+ r� r� )rV rf r` rU r� )r� r� r@ Ztmpr� Ztmp_lenZ other_lenrV r' r' r) r� / s r� c C sb | dkr dS |dkr | d| S t t| ��}t|�t|jd�� }|| k rPdS | d| S dS )a Given integers n and e, return n * 10**e if it's an integer, else None.
The computation is designed to avoid computing large powers of 10
unnecessarily.
>>> _decimal_lshift_exact(3, 4)
30000
>>> _decimal_lshift_exact(300, -999999999) # returns None
r% r� rQ N)r` rh rf �rstrip)r5 r� Zstr_nZval_nr' r' r) r O s r c C sF | dks|dkrt d��d}x$||kr@||| | d? }}q W |S )z�Closest integer to the square root of the positive integer n. a is
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r% z3Both arguments to _sqrt_nearest should be positive.r- )rl )r5 r rS r' r' r) �
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r� c C s2 d|> | |? }}|d| |d @ |d@ |k S )z�Given an integer x and a nonnegative integer shift, return closest
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r- r+ r' )r r� rS r� r' r' r) �_rshift_nearests s r� c C s& t | |�\}}|d| |d@ |k S )zaClosest integer to a/b, a and b positive integers; rounds to even
in the case of a tie.
r+ r- )r� )r rS r� r� r' r' r) � _div_nearest{ s r� r c C s� | | }d}xn||kr*t |�|| > |ksF||krzt |�|| ? |krzt|| d> |t||t||� |� �}|d7 }qW tdtt|�� d| � }t||�}t||�}x0t|d dd�D ] }t||�t|| |� }q�W t|| |�S )a� Integer approximation to M*log(x/M), with absolute error boundable
in terms only of x/M.
Given positive integers x and M, return an integer approximation to
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between the approximation and the exact result is at most 22. For
L = 8 and 1.0 <= x/M <= 10.0 the difference is at most 15. In
both cases these are upper bounds on the error; it will usually be
much smaller.r% r- r� r[ i����r� )rh r� r� r� rU rf r` r� ) r �M�Lr �R�TZyshift�wr� r' r' r) �_ilog� s
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(c-1)*10**e < x**y < (c+1)*10**e
in other words, c*10**e is an approximation to x**y with p digits
of precision, and with an error in c of at most 1. (This is
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== 10**(p-1) we can only guarantee error < 10ulp.)
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minimumwidth: nonnegative integer giving minimum width
zeropad: boolean, indicating whether to pad with zeros
thousands_sep: string to use as thousands separator, or ''
grouping: grouping for thousands separators, in format
used by localeconv
decimal_point: string to use for decimal point
precision: nonnegative integer giving precision, or None
type: one of the characters 'eEfFgG%', or None
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FVER
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COMM
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<# of sound frames> (4 bytes)
<size of the samples> (2 bytes)
<sampling frequency> (10 bytes, IEEE 80-bit extended
floating point)
in AIFF-C files only:
<compression type> (4 bytes)
<human-readable version of compression type> ("pstring")
SSND
<offset> (4 bytes, not used by this program)
<blocksize> (4 bytes, not used by this program)
<sound data>
A pstring consists of 1 byte length, a string of characters, and 0 or 1
byte pad to make the total length even.
Usage.
Reading AIFF files:
f = aifc.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
In some types of audio files, if the setpos() method is not used,
the seek() method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for AIFF files)
getcompname() -- returns human-readable version of
compression type ('not compressed' for AIFF files)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- get the list of marks in the audio file or None
if there are no marks
getmark(id) -- get mark with the specified id (raises an error
if the mark does not exist)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell(), the position given to setpos() and
the position of marks are all compatible and have nothing to do with
the actual position in the file.
The close() method is called automatically when the class instance
is destroyed.
Writing AIFF files:
f = aifc.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
aiff() -- create an AIFF file (AIFF-C default)
aifc() -- create an AIFF-C file
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
setmark(id, pos, name)
-- add specified mark to the list of marks
tell() -- return current position in output file (useful
in combination with setmark())
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
Marks can be added anytime. If there are any marks, you must call
close() after all frames have been written.
The close() method is called automatically when the class instance
is destroyed.
When a file is opened with the extension '.aiff', an AIFF file is
written, otherwise an AIFF-C file is written. This default can be
changed by calling aiff() or aifc() before the first writeframes or
writeframesraw.
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r�eg�dYeejfeaeejf edf ��eejhebk�
r�eg�dZeejhebeejh edf ��edeaeejf< edebeejh< �
q�W [a[b[d[ei Zixe`D ]Zeeeeieejh< � qW [e�d��d\�d]�Zjej� [j�d��d^�d_�Zk�d`d� Zl�dad� Zm�d��dbd�ZnG �dc�dd� �dd�Zo�deZp�dfZqepeq�dg�Zr�dh�di� Zset�djk�
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qBW dS (� ar "Executable documentation" for the pickle module.
Extensive comments about the pickle protocols and pickle-machine opcodes
can be found here. Some functions meant for external use:
genops(pickle)
Generate all the opcodes in a pickle, as (opcode, arg, position) triples.
dis(pickle, out=None, memo=None, indentlevel=4)
Print a symbolic disassembly of a pickle.
� N�dis�genops�optimize� � � � � c @ s e Zd ZdZdd� ZdS ) �ArgumentDescriptor�name�n�reader�docc C s` t |t�st�|| _t |t�r8|dks<|ttttt fks<t�|| _
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>>> import io
>>> read_uint1(io.BytesIO(b'\xff'))
255
r r z'not enough data in stream to read uint1N)�read�
ValueError)�f�datar r r �
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r% �uint1zOne-byte unsigned integer.)r r r
r c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io
>>> read_uint2(io.BytesIO(b'\xff\x00'))
255
>>> read_uint2(io.BytesIO(b'\xff\xff'))
65535
r z<Hr z'not enough data in stream to read uint2N)r! �len�_unpackr" )r# r$ r r r �
read_uint2� s
r) �uint2z)Two-byte unsigned integer, little-endian.c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io
>>> read_int4(io.BytesIO(b'\xff\x00\x00\x00'))
255
>>> read_int4(io.BytesIO(b'\x00\x00\x00\x80')) == -(2**31)
True
r z<ir z¬ enough data in stream to read int4N)r! r' r( r" )r# r$ r r r � read_int4� s
r+ �int4z8Four-byte signed integer, little-endian, 2's complement.c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io
>>> read_uint4(io.BytesIO(b'\xff\x00\x00\x00'))
255
>>> read_uint4(io.BytesIO(b'\x00\x00\x00\x80')) == 2**31
True
r z<Ir z'not enough data in stream to read uint4N)r! r' r( r" )r# r$ r r r �
read_uint4 s
r- �uint4z*Four-byte unsigned integer, little-endian.c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io
>>> read_uint8(io.BytesIO(b'\xff\x00\x00\x00\x00\x00\x00\x00'))
255
>>> read_uint8(io.BytesIO(b'\xff' * 8)) == 2**64-1
True
� z<Qr z'not enough data in stream to read uint8N)r! r' r( r" )r# r$ r r r �
read_uint8& s
r0 �uint8r/ z+Eight-byte unsigned integer, little-endian.Tc C s� | j � }|jd�std��|dd � }|rvxJd D ]6}|j|�r0|j|�sXtd||f ��|dd
� }P q0W td| ��|r�tj|�d jd
�}|S )au
>>> import io
>>> read_stringnl(io.BytesIO(b"'abcd'\nefg\n"))
'abcd'
>>> read_stringnl(io.BytesIO(b"\n"))
Traceback (most recent call last):
...
ValueError: no string quotes around b''
>>> read_stringnl(io.BytesIO(b"\n"), stripquotes=False)
''
>>> read_stringnl(io.BytesIO(b"''\n"))
''
>>> read_stringnl(io.BytesIO(b'"abcd"'))
Traceback (most recent call last):
...
ValueError: no newline found when trying to read stringnl
Embedded escapes are undone in the result.
>>> read_stringnl(io.BytesIO(br"'a\n\\b\x00c\td'" + b"\n'e'"))
'a\n\\b\x00c\td'
�
z-no newline found when trying to read stringnlNr � "� 'z,strinq quote %r not found at both ends of %rzno string quotes around %rr �ascii���)r3 r4 r6 )�readline�endswithr" �
startswith�codecs�
escape_decode�decode)r# r< � stripquotesr$ �qr r r �
read_stringnl; s
r? �stringnlz�A newline-terminated string.
This is a repr-style string, with embedded escapes, and
bracketing quotes.
c C s t | dd�S )NF)r= )r? )r# r r r �read_stringnl_noescapet s rA �stringnl_noescapea A newline-terminated string.
This is a str-style string, without embedded escapes,
or bracketing quotes. It should consist solely of
printable ASCII characters.
c C s dt | �t | �f S )zp
>>> import io
>>> read_stringnl_noescape_pair(io.BytesIO(b"Queue\nEmpty\njunk"))
'Queue Empty'
z%s %s)rA )r# r r r �read_stringnl_noescape_pair� s rC �stringnl_noescape_paira� A pair of newline-terminated strings.
These are str-style strings, without embedded
escapes, or bracketing quotes. They should
consist solely of printable ASCII characters.
The pair is returned as a single string, with
a single blank separating the two strings.
c C sL t | �}|dkst�| j|�}t|�|kr4|jd�S td|t|�f ��dS )z�
>>> import io
>>> read_string1(io.BytesIO(b"\x00"))
''
>>> read_string1(io.BytesIO(b"\x03abcdef"))
'abc'
r zlatin-1z2expected %d bytes in a string1, but only %d remainN)r% r r! r' r< r" )r# r r$ r r r � read_string1� s
rE �string1z�A counted string.
The first argument is a 1-byte unsigned int giving the number
of bytes in the string, and the second argument is that many
bytes.
c C sT t | �}|dk r td| ��| j|�}t|�|kr<|jd�S td|t|�f ��dS )aP
>>> import io
>>> read_string4(io.BytesIO(b"\x00\x00\x00\x00abc"))
''
>>> read_string4(io.BytesIO(b"\x03\x00\x00\x00abcdef"))
'abc'
>>> read_string4(io.BytesIO(b"\x00\x00\x00\x03abcdef"))
Traceback (most recent call last):
...
ValueError: expected 50331648 bytes in a string4, but only 6 remain
r zstring4 byte count < 0: %dzlatin-1z2expected %d bytes in a string4, but only %d remainN)r+ r" r! r' r< )r# r r$ r r r � read_string4� s
rG �string4z�A counted string.
The first argument is a 4-byte little-endian signed int giving
the number of bytes in the string, and the second argument is
that many bytes.
c C sF t | �}|dkst�| j|�}t|�|kr.|S td|t|�f ��dS )z�
>>> import io
>>> read_bytes1(io.BytesIO(b"\x00"))
b''
>>> read_bytes1(io.BytesIO(b"\x03abcdef"))
b'abc'
r z1expected %d bytes in a bytes1, but only %d remainN)r% r r! r' r" )r# r r$ r r r � read_bytes1� s
rI �bytes1z�A counted bytes string.
The first argument is a 1-byte unsigned int giving the number
of bytes in the string, and the second argument is that many
bytes.
c C sF t | �}|dkst�| j|�}t|�|kr.|S td|t|�f ��dS )z�
>>> import io
>>> read_bytes1(io.BytesIO(b"\x00"))
b''
>>> read_bytes1(io.BytesIO(b"\x03abcdef"))
b'abc'
r z1expected %d bytes in a bytes1, but only %d remainN)r% r r! r' r" )r# r r$ r r r rI � s
z�A counted bytes string.
The first argument is a 1-byte unsigned int giving the number
of bytes, and the second argument is that many bytes.
c C s\ t | �}|dkst�|tjkr*td| ��| j|�}t|�|krD|S td|t|�f ��dS )aN
>>> import io
>>> read_bytes4(io.BytesIO(b"\x00\x00\x00\x00abc"))
b''
>>> read_bytes4(io.BytesIO(b"\x03\x00\x00\x00abcdef"))
b'abc'
>>> read_bytes4(io.BytesIO(b"\x00\x00\x00\x03abcdef"))
Traceback (most recent call last):
...
ValueError: expected 50331648 bytes in a bytes4, but only 6 remain
r z#bytes4 byte count > sys.maxsize: %dz1expected %d bytes in a bytes4, but only %d remainN)r- r �sys�maxsizer" r! r' )r# r r$ r r r � read_bytes4 s
rM �bytes4z�A counted bytes string.
The first argument is a 4-byte little-endian unsigned int giving
the number of bytes, and the second argument is that many bytes.
c C s\ t | �}|dkst�|tjkr*td| ��| j|�}t|�|krD|S td|t|�f ��dS )a�
>>> import io, struct, sys
>>> read_bytes8(io.BytesIO(b"\x00\x00\x00\x00\x00\x00\x00\x00abc"))
b''
>>> read_bytes8(io.BytesIO(b"\x03\x00\x00\x00\x00\x00\x00\x00abcdef"))
b'abc'
>>> bigsize8 = struct.pack("<Q", sys.maxsize//3)
>>> read_bytes8(io.BytesIO(bigsize8 + b"abcdef")) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
ValueError: expected ... bytes in a bytes8, but only 6 remain
r z#bytes8 byte count > sys.maxsize: %dz1expected %d bytes in a bytes8, but only %d remainN)r0 r rK rL r" r! r' )r# r r$ r r r � read_bytes83 s
rO �bytes8z�A counted bytes string.
The first argument is an 8-byte little-endian unsigned int giving
the number of bytes, and the second argument is that many bytes.
c C s0 | j � }|jd�std��|dd� }t|d�S )zm
>>> import io
>>> read_unicodestringnl(io.BytesIO(b"abc\\uabcd\njunk")) == 'abc\uabcd'
True
r2 z4no newline found when trying to read unicodestringnlNr zraw-unicode-escaper6 )r7 r8 r" r )r# r$ r r r �read_unicodestringnlU s
rQ �unicodestringnlz�A newline-terminated Unicode string.
This is raw-unicode-escape encoded, so consists of
printable ASCII characters, and may contain embedded
escape sequences.
c C sN t | �}|dkst�| j|�}t|�|kr6t|dd�S td|t|�f ��dS )a�
>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc)]) # little-endian 1-byte length
>>> t = read_unicodestring1(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring1(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring1, but only 6 remain
r zutf-8�
surrogatepassz9expected %d bytes in a unicodestring1, but only %d remainN)r% r r! r' r r" )r# r r$ r r r �read_unicodestring1o s
rT �unicodestring1aA A counted Unicode string.
The first argument is a 1-byte little-endian signed int
giving the number of bytes in the string, and the second
argument-- the UTF-8 encoding of the Unicode string --
contains that many bytes.
c C sd t | �}|dkst�|tjkr*td| ��| j|�}t|�|krLt|dd�S td|t|�f ��dS )a�
>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc), 0, 0, 0]) # little-endian 4-byte length
>>> t = read_unicodestring4(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring4(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring4, but only 6 remain
r z+unicodestring4 byte count > sys.maxsize: %dzutf-8rS z9expected %d bytes in a unicodestring4, but only %d remainN)r- r rK rL r" r! r' r )r# r r$ r r r �read_unicodestring4� s
rV �unicodestring4aA A counted Unicode string.
The first argument is a 4-byte little-endian signed int
giving the number of bytes in the string, and the second
argument-- the UTF-8 encoding of the Unicode string --
contains that many bytes.
c C sd t | �}|dkst�|tjkr*td| ��| j|�}t|�|krLt|dd�S td|t|�f ��dS )a�
>>> import io
>>> s = 'abcd\uabcd'
>>> enc = s.encode('utf-8')
>>> enc
b'abcd\xea\xaf\x8d'
>>> n = bytes([len(enc)]) + b'\0' * 7 # little-endian 8-byte length
>>> t = read_unicodestring8(io.BytesIO(n + enc + b'junk'))
>>> s == t
True
>>> read_unicodestring8(io.BytesIO(n + enc[:-1]))
Traceback (most recent call last):
...
ValueError: expected 7 bytes in a unicodestring8, but only 6 remain
r z+unicodestring8 byte count > sys.maxsize: %dzutf-8rS z9expected %d bytes in a unicodestring8, but only %d remainN)r0 r rK rL r" r! r' r )r# r r$ r r r �read_unicodestring8� s
rX �unicodestring8aB A counted Unicode string.
The first argument is an 8-byte little-endian signed int
giving the number of bytes in the string, and the second
argument-- the UTF-8 encoding of the Unicode string --
contains that many bytes.
c C s. t | ddd�}|dkrdS |dkr&dS t|�S )z�
>>> import io
>>> read_decimalnl_short(io.BytesIO(b"1234\n56"))
1234
>>> read_decimalnl_short(io.BytesIO(b"1234L\n56"))
Traceback (most recent call last):
...
ValueError: invalid literal for int() with base 10: b'1234L'
F)r< r= s 00s 01T)r? r )r# �sr r r �read_decimalnl_short� s r[ c C s2 t | ddd�}|dd� dkr*|dd� }t|�S )z�
>>> import io
>>> read_decimalnl_long(io.BytesIO(b"1234L\n56"))
1234
>>> read_decimalnl_long(io.BytesIO(b"123456789012345678901234L\n6"))
123456789012345678901234
F)r< r= r N� Lr6 r6 )r? r )r# rZ r r r �read_decimalnl_long� s r] �decimalnl_shorta� A newline-terminated decimal integer literal.
This never has a trailing 'L', and the integer fit
in a short Python int on the box where the pickle
was written -- but there's no guarantee it will fit
in a short Python int on the box where the pickle
is read.
�decimalnl_longz�A newline-terminated decimal integer literal.
This has a trailing 'L', and can represent integers
of any size.
c C s t | ddd�}t|�S )zO
>>> import io
>>> read_floatnl(io.BytesIO(b"-1.25\n6"))
-1.25
F)r< r= )r? �float)r# rZ r r r � read_floatnl' s ra �floatnla� A newline-terminated decimal floating literal.
In general this requires 17 significant digits for roundtrip
identity, and pickling then unpickling infinities, NaNs, and
minus zero doesn't work across boxes, or on some boxes even
on itself (e.g., Windows can't read the strings it produces
for infinities or NaNs).
c C s0 | j d�}t|�dkr$td|�d S td��dS )z�
>>> import io, struct
>>> raw = struct.pack(">d", -1.25)
>>> raw
b'\xbf\xf4\x00\x00\x00\x00\x00\x00'
>>> read_float8(io.BytesIO(raw + b"\n"))
-1.25
r/ z>dr z(not enough data in stream to read float8N)r! r' r( r" )r# r$ r r r � read_float8= s
rc �float8a An 8-byte binary representation of a float, big-endian.
The format is unique to Python, and shared with the struct
module (format string '>d') "in theory" (the struct and pickle
implementations don't share the code -- they should). It's
strongly related to the IEEE-754 double format, and, in normal
cases, is in fact identical to the big-endian 754 double format.
On other boxes the dynamic range is limited to that of a 754
double, and "add a half and chop" rounding is used to reduce
the precision to 53 bits. However, even on a 754 box,
infinities, NaNs, and minus zero may not be handled correctly
(may not survive roundtrip pickling intact).
)� decode_longc C s. t | �}| j|�}t|�|kr&td��t|�S )a+
>>> import io
>>> read_long1(io.BytesIO(b"\x00"))
0
>>> read_long1(io.BytesIO(b"\x02\xff\x00"))
255
>>> read_long1(io.BytesIO(b"\x02\xff\x7f"))
32767
>>> read_long1(io.BytesIO(b"\x02\x00\xff"))
-256
>>> read_long1(io.BytesIO(b"\x02\x00\x80"))
-32768
z'not enough data in stream to read long1)r% r! r' r" re )r# r r$ r r r �
read_long1c s
rf �long1a A binary long, little-endian, using 1-byte size.
This first reads one byte as an unsigned size, then reads that
many bytes and interprets them as a little-endian 2's-complement long.
If the size is 0, that's taken as a shortcut for the long 0L.
c C sB t | �}|dk r td| ��| j|�}t|�|kr:td��t|�S )ag
>>> import io
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\xff\x00"))
255
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\xff\x7f"))
32767
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\x00\xff"))
-256
>>> read_long4(io.BytesIO(b"\x02\x00\x00\x00\x00\x80"))
-32768
>>> read_long1(io.BytesIO(b"\x00\x00\x00\x00"))
0
r zlong4 byte count < 0: %dz'not enough data in stream to read long4)r+ r" r! r' re )r# r r$ r r r �
read_long4� s
rh �long4a� A binary representation of a long, little-endian.
This first reads four bytes as a signed size (but requires the
size to be >= 0), then reads that many bytes and interprets them
as a little-endian 2's-complement long. If the size is 0, that's taken
as a shortcut for the int 0, although LONG1 should really be used
then instead (and in any case where # of bytes < 256).
c @ s e Zd Zd Zdd� Zdd� ZdS )
� StackObjectr �obtyper c C sp t |t�st�|| _t |t�s,t |t�s,t�t |t�rRx|D ]}t |t�s<t�q<W || _t |t�sft�|| _d S )N)r r r r �type�tuplerk r )r r rk r Z containedr r r r � s
zStackObject.__init__c C s | j S )N)r )r r r r �__repr__� s zStackObject.__repr__N)r rk r )r r r r r rn r r r r rj � s
rj r zA Python integer object.)r rk r Z int_or_boolz#A Python integer or boolean object.�boolzA Python boolean object.r` zA Python float object.Z bytes_or_strz*A Python bytes or (Unicode) string object.�byteszA Python bytes object.r z!A Python (Unicode) string object.�NonezThe Python None object.rm zA Python tuple object.�listzA Python list object.�dictzA Python dict object.�setzA Python set object.� frozensetzA Python frozenset object.�anyz Any kind of object whatsoever.Zmarkaz 'The mark' is a unique object.
Opcodes that operate on a variable number of objects
generally don't embed the count of objects in the opcode,
or pull it off the stack. Instead the MARK opcode is used
to push a special marker object on the stack, and then
some other opcodes grab all the objects from the top of
the stack down to (but not including) the topmost marker
object.
�
stackslicea� An object representing a contiguous slice of the stack.
This is used in conjunction with markobject, to represent all
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the POP_MARK opcode changes the stack from
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to
[...]
No matter how many object are on the stack after the topmost
markobject, POP_MARK gets rid of all of them (including the
topmost markobject too).
c @ s e Zd Zd Zdd � Zd
S ) �
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and LONG then is that INT skips a trailing 'L', and produces a short
int whenever possible.
Another difference is due to that, when bool was introduced as a
distinct type in 2.3, builtin names True and False were also added to
2.2.2, mapping to ints 1 and 0. For compatibility in both directions,
True gets pickled as INT + "I01\n", and False as INT + "I00\n".
Leading zeroes are never produced for a genuine integer. The 2.3
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The same as INT, except that the literal ends with 'L', and always
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conversion). Proto 2 added linear-time (in C; still quadratic-time
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'ASCII'. If the encoding given was 'bytes' however, they will be
decoded as bytes object instead.
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the Unpickler constructor. or the default, 'ASCII'. If the
encoding given was 'bytes' however, they will be decoded as bytes
object instead.
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BINUNICODE�Xa Push a Python Unicode string object.
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The argument is repr(a_float), and in general requires 17 significant
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on most boxes).
In general, FLOAT cannot be used to transport infinities, NaNs, or
minus zero across boxes (or even on a single box, if the platform C
library can't read the strings it produces for such things -- Windows
is like that), but may do less damage than BINFLOAT on boxes with
greater precision or dynamic range than IEEE-754 double.
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there are more than that, "add a half and chop" rounding is used to
cut it back to 53 significant bits).
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ZTUPLE3� a Build a three-tuple out of the top three items on the stack.
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EMPTY_DICT�}zPush an empty dict.ZDICT�da� Build a dict out of the topmost stack slice, after markobject.
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The slice of the stack following the topmost markobject is taken as
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immediately under the topmost markobject. Everything at and after the
topmost markobject is popped, leaving the mutated dict at the top
of the stack.
Stack before: ... pydict markobject key_1 value_1 ... key_n value_n
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where pydict has been modified via pydict[key_i] = value_i for i in
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The slice of the stack following the topmost markobject is taken as
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Stack before: ... pyset markobject item_1 ... item_n
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where pyset has been modified via pyset.add(item_i) = item_i for i in
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All the stack entries following the topmost markobject are placed into
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�POP�0z<Discard the top stack item, shrinking the stack by one item.ZDUP�2z=Push the top stack item onto the stack again, duplicating it.�MARK�(z�Push markobject onto the stack.
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�GET�gz�Read an object from the memo and push it on the stack.
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�BINGET�hz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 1-byte unsigned
integer following.
� LONG_BINGET�jz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 4-byte unsigned
little-endian integer following.
�PUT�pz�Store the stack top into the memo. The stack is not popped.
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terminated decimal string following. BINPUT and LONG_BINPUT are
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�BINPUTr> z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 1-byte
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� LONG_BINPUT�rz�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 4-byte
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�MEMOIZE� z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write is the number of
elements currently present in the memo.
ZEXT1� a� Extension code.
This code and the similar EXT2 and EXT4 allow using a registry
of popular objects that are pickled by name, typically classes.
It is envisioned that through a global negotiation and
registration process, third parties can set up a mapping between
ints and object names.
In order to guarantee pickle interchangeability, the extension
code registry ought to be global, although a range of codes may
be reserved for private use.
EXT1 has a 1-byte integer argument. This is used to index into the
extension registry, and the object at that index is pushed on the stack.
ZEXT2� zNExtension code.
See EXT1. EXT2 has a two-byte integer argument.
ZEXT4� zOExtension code.
See EXT1. EXT4 has a four-byte integer argument.
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Two newline-terminated strings follow the GLOBAL opcode. The first is
taken as a module name, and the second as a class name. The class
object module.class is pushed on the stack. More accurately, the
object returned by self.find_class(module, class) is pushed on the
stack, so unpickling subclasses can override this form of lookup.
Z STACK_GLOBAL� z7Push a global object (module.attr) on the stack.
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The opcode is named to remind of the __reduce__() method.
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The callable and the argument tuple are the first two items returned
by a __reduce__ method. Applying the callable to the argtuple is
supposed to reproduce the original object, or at least get it started.
If the __reduce__ method returns a 3-tuple, the last component is an
argument to be passed to the object's __setstate__, and then the REDUCE
opcode is followed by code to create setstate's argument, and then a
BUILD opcode to apply __setstate__ to that argument.
If not isinstance(callable, type), REDUCE complains unless the
callable has been registered with the copyreg module's
safe_constructors dict, or the callable has a magic
'__safe_for_unpickling__' attribute with a true value. I'm not sure
why it does this, but I've sure seen this complaint often enough when
I didn't want to <wink>.
ZBUILD�ba� Finish building an object, via __setstate__ or dict update.
Stack before: ... anyobject argument
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where anyobject may have been mutated, as follows:
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is called.
Else the argument must be a dict, the object must have a __dict__, and
the object is updated via
anyobject.__dict__.update(argument)
ZINST�iaq Build a class instance.
This is the protocol 0 version of protocol 1's OBJ opcode.
INST is followed by two newline-terminated strings, giving a
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GLOBAL for more details about that). self.find_class(module, name)
is used to get a class object.
In addition, all the objects on the stack following the topmost
markobject are gathered into a tuple and popped (along with the
topmost markobject), just as for the TUPLE opcode.
Now it gets complicated. If all of these are true:
+ The argtuple is empty (markobject was at the top of the stack
at the start).
+ The class object does not have a __getinitargs__ attribute.
then we want to create an old-style class instance without invoking
its __init__() method (pickle has waffled on this over the years; not
calling __init__() is current wisdom). In this case, an instance of
an old-style dummy class is created, and then we try to rebind its
__class__ attribute to the desired class object. If this succeeds,
the new instance object is pushed on the stack, and we're done.
Else (the argtuple is not empty, it's not an old-style class object,
or the class object does have a __getinitargs__ attribute), the code
first insists that the class object have a __safe_for_unpickling__
attribute. Unlike as for the __safe_for_unpickling__ check in REDUCE,
it doesn't matter whether this attribute has a true or false value, it
only matters whether it exists (XXX this is a bug). If
__safe_for_unpickling__ doesn't exist, UnpicklingError is raised.
Else (the class object does have a __safe_for_unpickling__ attr),
the class object obtained from INST's arguments is applied to the
argtuple obtained from the stack, and the resulting instance object
is pushed on the stack.
NOTE: checks for __safe_for_unpickling__ went away in Python 2.3.
NOTE: the distinction between old-style and new-style classes does
not make sense in Python 3.
ZOBJ�oa� Build a class instance.
This is the protocol 1 version of protocol 0's INST opcode, and is
very much like it. The major difference is that the class object
is taken off the stack, allowing it to be retrieved from the memo
repeatedly if several instances of the same class are created. This
can be much more efficient (in both time and space) than repeatedly
embedding the module and class names in INST opcodes.
Unlike INST, OBJ takes no arguments from the opcode stream. Instead
the class object is taken off the stack, immediately above the
topmost markobject:
Stack before: ... markobject classobject stackslice
Stack after: ... new_instance_object
As for INST, the remainder of the stack above the markobject is
gathered into an argument tuple, and then the logic seems identical,
except that no __safe_for_unpickling__ check is done (XXX this is
a bug). See INST for the gory details.
NOTE: In Python 2.3, INST and OBJ are identical except for how they
get the class object. That was always the intent; the implementations
had diverged for accidental reasons.
ZNEWOBJ� aL Build an object instance.
The stack before should be thought of as containing a class
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top). Call these cls and args. They are popped off the stack,
and the value returned by cls.__new__(cls, *args) is pushed back
onto the stack.
Z NEWOBJ_EX� au Build an object instance.
The stack before should be thought of as containing a class
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popped off the stack, and the value returned by
cls.__new__(cls, *args, *kwargs) is pushed back onto the stack.
�PROTO� z�Protocol version indicator.
For protocol 2 and above, a pickle must start with this opcode.
The argument is the protocol version, an int in range(2, 256).
�STOP�.z�Stop the unpickling machine.
Every pickle ends with this opcode. The object at the top of the stack
is popped, and that's the result of unpickling. The stack should be
empty then.
�FRAME� z�Indicate the beginning of a new frame.
The unpickler may use this opcode to safely prefetch data from its
underlying stream.
ZPERSID�Pa Push an object identified by a persistent ID.
The pickle module doesn't define what a persistent ID means. PERSID's
argument is a newline-terminated str-style (no embedded escapes, no
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The unpickler passes this string to self.persistent_load(). Whatever
object that returns is pushed on the stack. There is no implementation
of persistent_load() in Python's unpickler: it must be supplied by an
unpickler subclass.
Z BINPERSID�QaX Push an object identified by a persistent ID.
Like PERSID, except the persistent ID is popped off the stack (instead
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returns is pushed on the stack. See PERSID for more detail.
z%repeated name %r at indices %d and %dz%repeated code %r at indices %d and %dFc C s t j� }x�tjD ]�}tjd|�s2| rtd| � qtt|�}t|t � sTt
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each opcode:
opcode, arg, pos
opcode is an OpcodeInfo record, describing the current opcode.
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value, as a Python object. If the opcode doesn't have an argument, arg
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before reading the current opcode. If the pickle is a bytes object,
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� |j|� q4W td ||d� |�rptd | ��dS )(aK Produce a symbolic disassembly of a pickle.
'pickle' is a file-like object, or string, containing a (at least one)
pickle. The pickle is disassembled from the current position, through
the first STOP opcode encountered.
Optional arg 'out' is a file-like object to which the disassembly is
printed. It defaults to sys.stdout.
Optional arg 'memo' is a Python dict, used as the pickle's memo. It
may be mutated by dis(), if the pickle contains PUT or BINPUT opcodes.
Passing the same memo object to another dis() call then allows disassembly
to proceed across multiple pickles that were all created by the same
pickler with the same memo. Ordinarily you don't need to worry about this.
Optional arg 'indentlevel' is the number of blanks by which to indent
a new MARK level. It defaults to 4.
Optional arg 'annotate' if nonzero instructs dis() to add short
description of the opcode on each line of disassembled output.
The value given to 'annotate' must be an integer and is used as a
hint for the column where annotation should start. The default
value is 0, meaning no annotations.
In addition to printing the disassembly, some sanity checks are made:
+ All embedded opcode arguments "make sense".
+ Explicit and implicit pop operations have enough items on the stack.
+ When an opcode implicitly refers to a markobject, a markobject is
actually on the stack.
+ A memo entry isn't referenced before it's defined.
+ The markobject isn't stored in the memo.
+ A memo entry isn't redefined.
Nr � z%5d:)�end�filez %-4s %s%sr� z (MARK at unknown opcode offset)z (MARK at %d)r zno MARK exists on stackr� r� r� r� z(as %d)zmemo key %r already definedz'stack is empty -- can't store into memoz"can't store markobject in the memor� r� r� z&memo key %r has never been stored into�
�2 r� )r� z3tries to pop %d items from stack with only %d itemsz highest protocol among opcodes =z stack not empty after STOP: %rr6 r6 r6 r6 r6 )r� r� r� r� r6 r6 )r� r� r� )r r� �reprry r' r �maxr} r{ r| �
markobjectr rw �pop�indexr" r �splitr� �extend)r~ r� �memo� indentlevel�annotate�stackZmaxprotoZ markstackZ indentchunkZerrormsgZannocolr� rz r� �lineZbefore�afterZnumtopopZmarkmsgZmarkposZmemo_idxr r r r % s� -
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|| _ d S )N)�value)r r r r r r � s z_Example.__init__N)r r r r r r r r r � s r a�
>>> import pickle
>>> x = [1, 2, (3, 4), {b'abc': "def"}]
>>> pkl0 = pickle.dumps(x, 0)
>>> dis(pkl0)
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: L LONG 1
9: a APPEND
10: L LONG 2
14: a APPEND
15: ( MARK
16: L LONG 3
20: L LONG 4
24: t TUPLE (MARK at 15)
25: p PUT 1
28: a APPEND
29: ( MARK
30: d DICT (MARK at 29)
31: p PUT 2
34: c GLOBAL '_codecs encode'
50: p PUT 3
53: ( MARK
54: V UNICODE 'abc'
59: p PUT 4
62: V UNICODE 'latin1'
70: p PUT 5
73: t TUPLE (MARK at 53)
74: p PUT 6
77: R REDUCE
78: p PUT 7
81: V UNICODE 'def'
86: p PUT 8
89: s SETITEM
90: a APPEND
91: . STOP
highest protocol among opcodes = 0
Try again with a "binary" pickle.
>>> pkl1 = pickle.dumps(x, 1)
>>> dis(pkl1)
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: K BININT1 1
6: K BININT1 2
8: ( MARK
9: K BININT1 3
11: K BININT1 4
13: t TUPLE (MARK at 8)
14: q BINPUT 1
16: } EMPTY_DICT
17: q BINPUT 2
19: c GLOBAL '_codecs encode'
35: q BINPUT 3
37: ( MARK
38: X BINUNICODE 'abc'
46: q BINPUT 4
48: X BINUNICODE 'latin1'
59: q BINPUT 5
61: t TUPLE (MARK at 37)
62: q BINPUT 6
64: R REDUCE
65: q BINPUT 7
67: X BINUNICODE 'def'
75: q BINPUT 8
77: s SETITEM
78: e APPENDS (MARK at 3)
79: . STOP
highest protocol among opcodes = 1
Exercise the INST/OBJ/BUILD family.
>>> import pickletools
>>> dis(pickle.dumps(pickletools.dis, 0))
0: c GLOBAL 'pickletools dis'
17: p PUT 0
20: . STOP
highest protocol among opcodes = 0
>>> from pickletools import _Example
>>> x = [_Example(42)] * 2
>>> dis(pickle.dumps(x, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: c GLOBAL 'copy_reg _reconstructor'
30: p PUT 1
33: ( MARK
34: c GLOBAL 'pickletools _Example'
56: p PUT 2
59: c GLOBAL '__builtin__ object'
79: p PUT 3
82: N NONE
83: t TUPLE (MARK at 33)
84: p PUT 4
87: R REDUCE
88: p PUT 5
91: ( MARK
92: d DICT (MARK at 91)
93: p PUT 6
96: V UNICODE 'value'
103: p PUT 7
106: L LONG 42
111: s SETITEM
112: b BUILD
113: a APPEND
114: g GET 5
117: a APPEND
118: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(x, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: c GLOBAL 'copy_reg _reconstructor'
29: q BINPUT 1
31: ( MARK
32: c GLOBAL 'pickletools _Example'
54: q BINPUT 2
56: c GLOBAL '__builtin__ object'
76: q BINPUT 3
78: N NONE
79: t TUPLE (MARK at 31)
80: q BINPUT 4
82: R REDUCE
83: q BINPUT 5
85: } EMPTY_DICT
86: q BINPUT 6
88: X BINUNICODE 'value'
98: q BINPUT 7
100: K BININT1 42
102: s SETITEM
103: b BUILD
104: h BINGET 5
106: e APPENDS (MARK at 3)
107: . STOP
highest protocol among opcodes = 1
Try "the canonical" recursive-object test.
>>> L = []
>>> T = L,
>>> L.append(T)
>>> L[0] is T
True
>>> T[0] is L
True
>>> L[0][0] is L
True
>>> T[0][0] is T
True
>>> dis(pickle.dumps(L, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: ( MARK
6: g GET 0
9: t TUPLE (MARK at 5)
10: p PUT 1
13: a APPEND
14: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(L, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: h BINGET 0
6: t TUPLE (MARK at 3)
7: q BINPUT 1
9: a APPEND
10: . STOP
highest protocol among opcodes = 1
Note that, in the protocol 0 pickle of the recursive tuple, the disassembler
has to emulate the stack in order to realize that the POP opcode at 16 gets
rid of the MARK at 0.
>>> dis(pickle.dumps(T, 0))
0: ( MARK
1: ( MARK
2: l LIST (MARK at 1)
3: p PUT 0
6: ( MARK
7: g GET 0
10: t TUPLE (MARK at 6)
11: p PUT 1
14: a APPEND
15: 0 POP
16: 0 POP (MARK at 0)
17: g GET 1
20: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(T, 1))
0: ( MARK
1: ] EMPTY_LIST
2: q BINPUT 0
4: ( MARK
5: h BINGET 0
7: t TUPLE (MARK at 4)
8: q BINPUT 1
10: a APPEND
11: 1 POP_MARK (MARK at 0)
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 1
Try protocol 2.
>>> dis(pickle.dumps(L, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: . STOP
highest protocol among opcodes = 2
>>> dis(pickle.dumps(T, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: 0 POP
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 2
Try protocol 3 with annotations:
>>> dis(pickle.dumps(T, 3), annotate=1)
0: \x80 PROTO 3 Protocol version indicator.
2: ] EMPTY_LIST Push an empty list.
3: q BINPUT 0 Store the stack top into the memo. The stack is not popped.
5: h BINGET 0 Read an object from the memo and push it on the stack.
7: \x85 TUPLE1 Build a one-tuple out of the topmost item on the stack.
8: q BINPUT 1 Store the stack top into the memo. The stack is not popped.
10: a APPEND Append an object to a list.
11: 0 POP Discard the top stack item, shrinking the stack by one item.
12: h BINGET 1 Read an object from the memo and push it on the stack.
14: . STOP Stop the unpickling machine.
highest protocol among opcodes = 2
a=
>>> import pickle
>>> import io
>>> f = io.BytesIO()
>>> p = pickle.Pickler(f, 2)
>>> x = [1, 2, 3]
>>> p.dump(x)
>>> p.dump(x)
>>> f.seek(0)
0
>>> memo = {}
>>> dis(f, memo=memo)
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: ( MARK
6: K BININT1 1
8: K BININT1 2
10: K BININT1 3
12: e APPENDS (MARK at 5)
13: . STOP
highest protocol among opcodes = 2
>>> dis(f, memo=memo)
14: \x80 PROTO 2
16: h BINGET 0
18: . STOP
highest protocol among opcodes = 2
)Zdisassembler_testZdisassembler_memo_testc C s dd l } | j� S )Nr )�doctestZtestmod)r r r r �_test�
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A poplib.cpython-36.opt-1.pyc 0000644 00000032023 15033571514 0011422 0 ustar 00 3
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USER name user(name)
PASS string pass_(string)
STAT stat()
LIST [msg] list(msg = None)
RETR msg retr(msg)
DELE msg dele(msg)
NOOP noop()
RSET rset()
QUIT quit()
Optional Commands (some servers support these):
RPOP name rpop(name)
APOP name digest apop(name, digest)
TOP msg n top(msg, n)
UIDL [msg] uidl(msg = None)
CAPA capa()
STLS stls()
UTF8 utf8()
Raises one exception: 'error_proto'.
Instantiate with:
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POP is a line-based protocol, which means large mail
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NzLIST %sZLIST)r5 r6 )r �whichr r r r3 � s z POP3.listc C s | j d| �S )zoRetrieve whole message number 'which'.
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zDELE %s)r5 )r r? r r r �dele� s z POP3.delec C s
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ZNOOP)r5 )r r r r �noop s z POP3.noopc C s
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d||f �S )a Authorisation
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(1, 'cat: /bin/junk: No such file or directory')
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executable: A replacement program to execute.
stdin, stdout and stderr: These specify the executed programs' standard
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preexec_fn: (POSIX only) An object to be called in the child process
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close_fds: Controls closing or inheriting of file descriptors.
shell: If true, the command will be executed through the shell.
cwd: Sets the current directory before the child is executed.
env: Defines the environment variables for the new process.
universal_newlines: If true, use universal line endings for file
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startupinfo and creationflags (Windows only)
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| | S )z self - otherr )r r r r r �__sub__[ s zComplex.__sub__c C s
| | S )z other - selfr )r r r r r �__rsub___ s zComplex.__rsub__c C s t �dS )z self * otherN)r )r r r r r �__mul__c s zComplex.__mul__c C s t �dS )z other * selfN)r )r r r r r �__rmul__h s zComplex.__rmul__c C s t �dS )z5self / other: Should promote to float when necessary.N)r )r r r r r � __truediv__m s zComplex.__truediv__c C s t �dS )z other / selfN)r )r r r r r � __rtruediv__r s zComplex.__rtruediv__c C s t �dS )zBself**exponent; should promote to float or complex when necessary.N)r )r �exponentr r r �__pow__w s zComplex.__pow__c C s t �dS )z base ** selfN)r )r �baser r r �__rpow__| s zComplex.__rpow__c C s t �dS )z7Returns the Real distance from 0. Called for abs(self).N)r )r r r r �__abs__� s zComplex.__abs__c C s t �dS )z$(x+y*i).conjugate() returns (x-y*i).N)r )r r r r � conjugate� s zComplex.conjugatec C s t �dS )z
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If the optional flag `follow_symlinks` is not set, symlinks aren't
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c C sB t jj|�r"t jj|t jj| ��}t| ||d� t| ||d� |S )a1 Copy data and metadata. Return the file's destination.
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)r4 )r, r- r_ r` ra r r )r1 r2 r4 r r r! r � s
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|��|S )a� Recursively copy a directory tree.
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it is false, the contents of the files pointed to by symbolic
links are copied. If the file pointed by the symlink doesn't
exist, an exception will be added in the list of errors raised in
an Error exception at the end of the copy process.
You can set the optional ignore_dangling_symlinks flag to true if you
want to silence this exception. Notice that this has no effect on
platforms that don't support os.symlink.
The optional ignore argument is a callable. If given, it
is called with the `src` parameter, which is the directory
being visited by copytree(), and `names` which is the list of
`src` contents, as returned by os.listdir():
callable(src, names) -> ignored_names
Since copytree() is called recursively, the callable will be
called once for each directory that is copied. It returns a
list of names relative to the `src` directory that should
not be copied.
The optional copy_function argument is a callable that will be used
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t| |�S dS )a� Recursively delete a directory tree.
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path, exc_info) where func is platform and implementation dependent;
path is the argument to that function that caused it to fail; and
exc_info is a tuple returned by sys.exc_info(). If ignore_errors
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c C s& t jjt jjpd }t jj| j|��S )N� )r, r- �sep�altsepra �rstrip)r- r� r r r! � _basename� s r� c C s |}t jj|�rTt| |�r*t j| |� dS t jj|t| ��}t jj|�rTtd| ��yt j| |� W n� t k
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| � Y nX |S )a+ Recursively move a file or directory to another location. This is
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destination.
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exist.
If the destination already exists but is not a directory, it may be
overwritten depending on os.rename() semantics.
If the destination is on our current filesystem, then rename() is used.
Otherwise, src is copied to the destination and then removed. Symlinks are
recreated under the new name if os.rename() fails because of cross
filesystem renames.
The optional `copy_function` argument is a callable that will be used
to copy the source or it will be delegated to `copytree`.
By default, copy2() is used, but any function that supports the same
signature (like copy()) can be used.
A lot more could be done here... A look at a mv.c shows a lot of
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Nz$Destination path '%s' already existsz.Cannot move a directory '%s' into itself '%s'.T)rq ro )r, r- r_ r3 �renamer` r� rl r
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archive that is being built. If not provided, the current owner and group
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Nr� r� Zgz�bzip2�bz2�xzzCbad value for 'compress', or compression format not supported : {0}r �.z.tarz creating %szCreating tar archivec s, � d k r� | _ �| _�d k r(�| _�| _| S )N)�gidZgname�uid�uname)Ztarinfo)r� �group�ownerr� r r! � _set_uid_gid� s z#_make_tarball.<locals>._set_uid_gidzw|%s)rd )�_ZLIB_SUPPORTED�_BZ2_SUPPORTED�_LZMA_SUPPORTED�
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��} tjj| ��r|j | | � |dk �r|jd| � �qW q�W W dQ R X |S ) z�Create a zip file from all the files under 'base_dir'.
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<listcomp>� s z'get_archive_formats.<locals>.<listcomp>)�_ARCHIVE_FORMATS�items�sort)�formatsr r r! r � s r� c C sz |dkr g }t |�s td| ��t|ttf�s6td��x0|D ](}t|ttf� s\t|�dkr<td��q<W |||ft| < dS )au Registers an archive format.
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Nz The %s object is not callablez!extra_args needs to be a sequencer� z+extra_args elements are : (arg_name, value))�callable� TypeErrorr� �tuple�list�lenr� )rL �function�
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| � t j| � X |S ) a Create an archive file (eg. zip or tar).
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"bztar", or "xztar". Or any other registered format.
'root_dir' is a directory that will be the root directory of the
archive; ie. we typically chdir into 'root_dir' before creating the
archive. 'base_dir' is the directory where we start archiving from;
ie. 'base_dir' will be the common prefix of all files and
directories in the archive. 'root_dir' and 'base_dir' both default
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exception.
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description can be provided to describe the format, and will be returned
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r\ tdj|���Y nX |d }|| |ft|d �|�� nRt| �}|dkr�tdj| ���t| d }tt| d �}|j |� || |f|� dS )a] Unpack an archive.
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or "xztar". Or any other registered format. If not provided,
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_getdiskusager� )r- r� r� r� r r r! r� � s c C s� |dkr|dkrt d��|}|}|dkr.d}n(t|t�rVt|�}|dkrVtdj|���|dkrdd}n(t|t�s�t|�}|dkr�tdj|���tj | ||� dS )z�Change owner user and group of the given path.
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the terminal connected to sys.__stdout__ is queried
by invoking os.get_terminal_size.
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the system doesn't support querying, or because we are not
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of os.environ.get("PATH"), or can be overridden with a custom search
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configparser.cpython-36.opt-1.pyc 0000644 00000130276 15033571514 0012630 0 ustar 00 3
\X� � @ s� d Z ddlmZ ddlmZmZ ddlZddl Z ddl
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A configuration file consists of sections, lead by a "[section]" header,
and followed by "name: value" entries, with continuations and such in
the style of RFC 822.
Intrinsic defaults can be specified by passing them into the
ConfigParser constructor as a dictionary.
class:
ConfigParser -- responsible for parsing a list of
configuration files, and managing the parsed database.
methods:
__init__(defaults=None, dict_type=_default_dict, allow_no_value=False,
delimiters=('=', ':'), comment_prefixes=('#', ';'),
inline_comment_prefixes=None, strict=True,
empty_lines_in_values=True, default_section='DEFAULT',
interpolation=<unset>, converters=<unset>):
Create the parser. When `defaults' is given, it is initialized into the
dictionary or intrinsic defaults. The keys must be strings, the values
must be appropriate for %()s string interpolation.
When `dict_type' is given, it will be used to create the dictionary
objects for the list of sections, for the options within a section, and
for the default values.
When `delimiters' is given, it will be used as the set of substrings
that divide keys from values.
When `comment_prefixes' is given, it will be used as the set of
substrings that prefix comments in empty lines. Comments can be
indented.
When `inline_comment_prefixes' is given, it will be used as the set of
substrings that prefix comments in non-empty lines.
When `strict` is True, the parser won't allow for any section or option
duplicates while reading from a single source (file, string or
dictionary). Default is True.
When `empty_lines_in_values' is False (default: True), each empty line
marks the end of an option. Otherwise, internal empty lines of
a multiline option are kept as part of the value.
When `allow_no_value' is True (default: False), options without
values are accepted; the value presented for these is None.
When `default_section' is given, the name of the special section is
named accordingly. By default it is called ``"DEFAULT"`` but this can
be customized to point to any other valid section name. Its current
value can be retrieved using the ``parser_instance.default_section``
attribute and may be modified at runtime.
When `interpolation` is given, it should be an Interpolation subclass
instance. It will be used as the handler for option value
pre-processing when using getters. RawConfigParser object s don't do
any sort of interpolation, whereas ConfigParser uses an instance of
BasicInterpolation. The library also provides a ``zc.buildbot``
inspired ExtendedInterpolation implementation.
When `converters` is given, it should be a dictionary where each key
represents the name of a type converter and each value is a callable
implementing the conversion from string to the desired datatype. Every
converter gets its corresponding get*() method on the parser object and
section proxies.
sections()
Return all the configuration section names, sans DEFAULT.
has_section(section)
Return whether the given section exists.
has_option(section, option)
Return whether the given option exists in the given section.
options(section)
Return list of configuration options for the named section.
read(filenames, encoding=None)
Read and parse the iterable of named configuration files, given by
name. A single filename is also allowed. Non-existing files
are ignored. Return list of successfully read files.
read_file(f, filename=None)
Read and parse one configuration file, given as a file object.
The filename defaults to f.name; it is only used in error
messages (if f has no `name' attribute, the string `<???>' is used).
read_string(string)
Read configuration from a given string.
read_dict(dictionary)
Read configuration from a dictionary. Keys are section names,
values are dictionaries with keys and values that should be present
in the section. If the used dictionary type preserves order, sections
and their keys will be added in order. Values are automatically
converted to strings.
get(section, option, raw=False, vars=None, fallback=_UNSET)
Return a string value for the named option. All % interpolations are
expanded in the return values, based on the defaults passed into the
constructor and the DEFAULT section. Additional substitutions may be
provided using the `vars' argument, which must be a dictionary whose
contents override any pre-existing defaults. If `option' is a key in
`vars', the value from `vars' is used.
getint(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to an integer.
getfloat(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to a float.
getboolean(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to a boolean (currently case
insensitively defined as 0, false, no, off for False, and 1, true,
yes, on for True). Returns False or True.
items(section=_UNSET, raw=False, vars=None)
If section is given, return a list of tuples with (name, value) for
each option in the section. Otherwise, return a list of tuples with
(section_name, section_proxy) for each section, including DEFAULTSECT.
remove_section(section)
Remove the given file section and all its options.
remove_option(section, option)
Remove the given option from the given section.
set(section, option, value)
Set the given option.
write(fp, space_around_delimiters=True)
Write the configuration state in .ini format. If
`space_around_delimiters' is True (the default), delimiters
between keys and values are surrounded by spaces.
� )�MutableMapping)� OrderedDict�ChainMapN�NoSectionError�DuplicateOptionError�DuplicateSectionError�
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left_list, right_list: The files in dir1 and dir2,
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common: a list of names in both dir1 and dir2.
left_only, right_only: names only in dir1, dir2.
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common_files: files in both dir1 and dir2.
common_funny: names in both dir1 and dir2 where the type differs between
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same_files: list of identical files.
diff_files: list of filenames which differ.
funny_files: list of files which could not be compared.
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GETANNOTATION�GETQUOTA� GETQUOTAROOT�MYRIGHTS�LIST�LOGINr �LSUBZMOVE� NAMESPACE�NOOP�PARTIAL� PROXYAUTH�RENAME�SEARCH�SELECT�SETACL�
SETANNOTATION�SETQUOTA�SORT�STARTTLS�STATUS�STORE� SUBSCRIBE�THREAD�UID� UNSUBSCRIBEs \+( (?P<data>.*))?s .*FLAGS \((?P<flags>[^\)]*)\)s� .*INTERNALDATE "(?P<day>[ 0123][0-9])-(?P<mon>[A-Z][a-z][a-z])-(?P<year>[0-9][0-9][0-9][0-9]) (?P<hour>[0-9][0-9]):(?P<min>[0-9][0-9]):(?P<sec>[0-9][0-9]) (?P<zonen>[-+])(?P<zoneh>[0-9][0-9])(?P<zonem>[0-9][0-9])"s .*{(?P<size>\d+)}$s
\r\n|\r|\ns% \[(?P<type>[A-Z-]+)( (?P<data>.*))?\]s$ \* (?P<type>[A-Z-]+)( (?P<data>.*))?s3 \* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?c @ s� e Zd ZdZG dd� de�ZG dd� de�ZG dd� de�Zdefd d
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dd� Zdd� Zdd� Zdefdd�Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Z d1d2� Z d3d4� Z d5d6� Z d7d8� Z d9d:� Z!d;d<� Z"d=d>� Z#d?d@� Z$dAdB� Z%dCdD� Z&dEdF� Z'dGdH� Z(d�dKdL�Z)dMdN� Z*dOdP� Z+dQdR� Z,dSdT� Z-d�dUdV�Z.dWdX� Z/dYdZ� Z0d[d\� Z1d]d^� Z2d_d`� Z3dadb� Z4dcdd� Z5d�dgdh�Z6didj� Z7dkdl� Z8dmdn� Z9dodp� Z:d�drds�Z;dtdu� Z<dvdw� Z=dxdy� Z>dzd{� Z?d|d}� Z@d~d� ZAd�d�� ZBd�d�� ZCd�d�� ZDd�d�� ZEd�d�� ZFd�d�� ZGd�d�� ZHd�d�� ZId�d�� ZJd�d�� ZKd�d�� ZLd�d�� ZMd�d�� ZNd�d�� ZOdqS )�r a� IMAP4 client class.
Instantiate with: IMAP4([host[, port]])
host - host's name (default: localhost);
port - port number (default: standard IMAP4 port).
All IMAP4rev1 commands are supported by methods of the same
name (in lower-case).
All arguments to commands are converted to strings, except for
AUTHENTICATE, and the last argument to APPEND which is passed as
an IMAP4 literal. If necessary (the string contains any
non-printing characters or white-space and isn't enclosed with
either parentheses or double quotes) each string is quoted.
However, the 'password' argument to the LOGIN command is always
quoted. If you want to avoid having an argument string quoted
(eg: the 'flags' argument to STORE) then enclose the string in
parentheses (eg: "(\Deleted)").
Each command returns a tuple: (type, [data, ...]) where 'type'
is usually 'OK' or 'NO', and 'data' is either the text from the
tagged response, or untagged results from command. Each 'data'
is either a string, or a tuple. If a tuple, then the first part
is the header of the response, and the second part contains
the data (ie: 'literal' value).
Errors raise the exception class <instance>.error("<reason>").
IMAP4 server errors raise <instance>.abort("<reason>"),
which is a sub-class of 'error'. Mailbox status changes
from READ-WRITE to READ-ONLY raise the exception class
<instance>.readonly("<reason>"), which is a sub-class of 'abort'.
"error" exceptions imply a program error.
"abort" exceptions imply the connection should be reset, and
the command re-tried.
"readonly" exceptions imply the command should be re-tried.
Note: to use this module, you must read the RFCs pertaining to the
IMAP4 protocol, as the semantics of the arguments to each IMAP4
command are left to the invoker, not to mention the results. Also,
most IMAP servers implement a sub-set of the commands available here.
c @ s e Zd ZdS )z IMAP4.errorN)�__name__�
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r� Y nX � Y nX d S )Nr rA Fr )�Debug�debug�state�literal�tagged_commands�untagged_responses�continuation_response� is_readonly�tagnum�_tls_established� _mode_ascii�open�_connect� Exception�shutdown�OSError)�self�host�portr< r< r= �__init__� s& zIMAP4.__init__c C s0 d| _ d| _tjttj�| _tjttj�| _d S )NF�ascii) � utf8_enabled� _encoding�re�compile�_Literal�ASCII�Literal�_Untagged_status�Untagged_status)rR r< r< r= rL � s zIMAP4._mode_asciic C s( d| _ d| _tjt�| _tjt�| _d S )NTzutf-8)rW rX rY rZ r[ r] r^ r_ )rR r< r< r= �
_mode_utf8� s zIMAP4._mode_utf8c C s� t tjdd��| _tjd| j d tj�| _| j� | _ d| j
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� x tD ]}|| jkr�qt|| _d S W | j d ��d S )
Ni i�� s (?P<tag>s" \d+) (?P<type>[A-Z]+) (?P<data>.*)ZPREAUTHr �OKr zserver not IMAP4 compliant)r �randomZrandint�tagprerY rZ r\ �tagre�
_get_responseZwelcomerG rD r> �_get_capabilities�AllowedVersions� capabilities�PROTOCOL_VERSION)rR �versionr< r< r= rN � s
zIMAP4._connectc C s& |t krt| |j� �S td| ��d S )NzUnknown IMAP4 command: '%s')�Commands�getattr�lower�AttributeError)rR �attrr< r< r= � __getattr__ s zIMAP4.__getattr__c C s | S )Nr< )rR r< r< r= � __enter__ s zIMAP4.__enter__c G s& y | j � W n tk
r Y nX d S )N)�logoutrQ )rR �argsr< r< r= �__exit__ s zIMAP4.__exit__c C s | j s
d n| j }tj|| jf�S )N)rS �socketZcreate_connectionrT )rR rS r< r< r= �_create_socket s zIMAP4._create_socketc C s( || _ || _| j� | _| jjd�| _dS )z�Setup connection to remote server on "host:port"
(default: localhost:standard IMAP4 port).
This connection will be used by the routines:
read, readline, send, shutdown.
�rbN)rS rT rv �sock�makefile�file)rR rS rT r< r< r= rM # s
z
IMAP4.openc C s | j j|�S )z Read 'size' bytes from remote.)rz �read)rR �sizer< r< r= r{ / s z
IMAP4.readc C s. | j jtd �}t|�tkr*| jdt ��|S )zRead line from remote.� zgot more than %d bytes)rz �readline�_MAXLINE�lenr> )rR �liner< r< r= r~ 4 s zIMAP4.readlinec C s | j j|� dS )zSend data to remote.N)rx Zsendall)rR �datar< r< r= �send< s z
IMAP4.sendc C st | j j� zXy| jjtj� W n@ tk
r^ } z$|jtjkrNt |dd�dkrN� W Y dd}~X nX W d| jj� X dS )z Close I/O established in "open".Zwinerrorr i&' N)
rz �closerx rP ru Z SHUT_RDWRrQ �errnoZENOTCONNrl )rR �excr< r< r= rP A s
zIMAP4.shutdownc C s | j S )zfReturn socket instance used to connect to IMAP4 server.
socket = <instance>.socket()
)rx )rR r< r< r= ru Q s z IMAP4.socketc C sB d}| j ddg|�\}}|d r(||fS | j� \}}| j |||�S )a Return most recent 'RECENT' responses if any exist,
else prompt server for an update using the 'NOOP' command.
(typ, [data]) = <instance>.recent()
'data' is None if no new messages,
else list of RECENT responses, most recent last.
ZRECENTra Nr} ���)�_untagged_response�noop)rR �name�typ�datr< r< r= �recent] s z IMAP4.recentc C s | j |dg|j� �S )z�Return data for response 'code' if received, or None.
Old value for response 'code' is cleared.
(code, [data]) = <instance>.response(code)
N)r� �upper)rR �coder< r< r= �responsen s zIMAP4.responsec C sx d}|s d}|r.|d |d fd kr2d| }nd}|r@t |�}nd}tjt|�}| jrbd | d
}|| _| j||||�S )
z�Append message to named mailbox.
(typ, [data]) = <instance>.append(mailbox, flags, date_time, message)
All args except `message' can be None.
r �INBOXr r} �(�)z(%s)Ns UTF8 (� )r� )r� r� )r �MapCRLF�sub�CRLFrW rE �_simple_command)rR �mailbox�flags� date_time�messager� rE r< r< r= �append| s
z IMAP4.appendc C sP |j � }t|�j| _| jd|�\}}|dkrB| j|d jdd���d| _||fS )as Authenticate command - requires response processing.
'mechanism' specifies which authentication mechanism is to
be used - it must appear in <instance>.capabilities in the
form AUTH=<mechanism>.
'authobject' must be a callable object:
data = authobject(response)
It will be called to process server continuation responses; the
response argument it is passed will be a bytes. It should return bytes
data that will be base64 encoded and sent to the server. It should
return None if the client abort response '*' should be sent instead.
r ra r} zutf-8�replacer r� )r� �_Authenticator�processrE r� r> �decoderD )rR Z mechanismZ
authobject�mechr� r� r< r< r= � authenticate� s zIMAP4.authenticatec C s d}| j |�\}}| j|||�S )zT(typ, [data]) = <instance>.capability()
Fetch capabilities list from server.r )r� r� )rR r� r� r� r< r< r= �
capability� s zIMAP4.capabilityc C s
| j d�S )zRCheckpoint mailbox on server.
(typ, [data]) = <instance>.check()
r )r� )rR r< r< r= �check� s z IMAP4.checkc C s$ z| j d�\}}W dd| _X ||fS )z�Close currently selected mailbox.
Deleted messages are removed from writable mailbox.
This is the recommended command before 'LOGOUT'.
(typ, [data]) = <instance>.close()
r Nr )r� rD )rR r� r� r< r< r= r� � s z IMAP4.closec C s | j d||�S )z�Copy 'message_set' messages onto end of 'new_mailbox'.
(typ, [data]) = <instance>.copy(message_set, new_mailbox)
r )r� )rR � message_setZ new_mailboxr< r< r= �copy� s z
IMAP4.copyc C s | j d|�S )zPCreate new mailbox.
(typ, [data]) = <instance>.create(mailbox)
r )r� )rR r� r< r< r= �create� s z IMAP4.createc C s | j d|�S )zPDelete old mailbox.
(typ, [data]) = <instance>.delete(mailbox)
r )r� )rR r� r< r< r= �delete� s z IMAP4.deletec C s | j d||�S )z�Delete the ACLs (remove any rights) set for who on mailbox.
(typ, [data]) = <instance>.deleteacl(mailbox, who)
r )r� )rR r� �whor< r< r= � deleteacl� s zIMAP4.deleteaclc C sH d| j krtjd��| jd|�\}}|dkr@d|j� kr@| j� ||fS )zkSend an RFC5161 enable string to the server.
(typ, [data]) = <intance>.enable(capability)
r z Server does not support ENABLEra z UTF8=ACCEPT)rh r r> r� r� r` )rR r� r� r� r< r< r= �enable� s
z IMAP4.enablec C s d}| j |�\}}| j|||�S )z�Permanently remove deleted items from selected mailbox.
Generates 'EXPUNGE' response for each deleted message.
(typ, [data]) = <instance>.expunge()
'data' is list of 'EXPUNGE'd message numbers in order received.
r )r� r� )rR r� r� r� r< r< r= �expunge� s z
IMAP4.expungec C s$ d}| j |||�\}}| j|||�S )a# Fetch (parts of) messages.
(typ, [data, ...]) = <instance>.fetch(message_set, message_parts)
'message_parts' should be a string of selected parts
enclosed in parentheses, eg: "(UID BODY[TEXT])".
'data' are tuples of message part envelope and data.
r )r� r� )rR r� Z
message_partsr� r� r� r< r< r= �fetch s
z IMAP4.fetchc C s | j d|�\}}| j||d�S )zXGet the ACLs for a mailbox.
(typ, [data]) = <instance>.getacl(mailbox)
r ZACL)r� r� )rR r� r� r� r< r< r= �getacl s z IMAP4.getaclc C s" | j d|||�\}}| j||d�S )za(typ, [data]) = <instance>.getannotation(mailbox, entry, attribute)
Retrieve ANNOTATIONs.r �
ANNOTATION)r� r� )rR r� �entryZ attributer� r� r< r< r= �
getannotation# s zIMAP4.getannotationc C s | j d|�\}}| j||d�S )z�Get the quota root's resource usage and limits.
Part of the IMAP4 QUOTA extension defined in rfc2087.
(typ, [data]) = <instance>.getquota(root)
r! �QUOTA)r� r� )rR �rootr� r� r< r< r= �getquota+ s zIMAP4.getquotac C s@ | j d|�\}}| j||d�\}}| j||d�\}}|||gfS )z�Get the list of quota roots for the named mailbox.
(typ, [[QUOTAROOT responses...], [QUOTA responses]]) = <instance>.getquotaroot(mailbox)
r" r� Z QUOTAROOT)r� r� )rR r� r� r� ZquotaZ quotarootr< r< r= � getquotaroot6 s zIMAP4.getquotaroot�""�*c C s$ d}| j |||�\}}| j|||�S )z�List mailbox names in directory matching pattern.
(typ, [data]) = <instance>.list(directory='""', pattern='*')
'data' is list of LIST responses.
r$ )r� r� )rR � directory�patternr� r� r� r< r< r= �listA s z
IMAP4.listc C s< | j d|| j|��\}}|dkr.| j|d ��d| _||fS )z�Identify client using plaintext password.
(typ, [data]) = <instance>.login(user, password)
NB: 'password' will be quoted.
r% ra r} r r� )r� �_quoter> rD )rR �user�passwordr� r� r< r< r= �loginM s
z IMAP4.loginc C s || | _ | _| jd| j�S )zr Force use of CRAM-MD5 authentication.
(typ, [data]) = <instance>.login_cram_md5(user, password)
zCRAM-MD5)r� r� r� �_CRAM_MD5_AUTH)rR r� r� r< r< r= �login_cram_md5[ s zIMAP4.login_cram_md5c C sB ddl }t| jt�r | jjd�n| j}| jd |j||d�j� S )z1 Authobject to use with CRAM-MD5 authentication. r Nzutf-8� Zmd5)�hmac�
isinstancer� �str�encoder� ZHMACZ hexdigest)rR Z challenger� �pwdr< r< r= r� d s zIMAP4._CRAM_MD5_AUTHc C sj d| _ y| jd�\}}W n( ddtj� dd� g }}Y nX | j� d| jkrbd| jd fS ||fS )z|Shutdown connection to server.
(typ, [data]) = <instance>.logout()
Returns server 'BYE' response.
r �NOz%s: %sN� �BYE)rD r� �sys�exc_inforP rG )rR r� r� r< r< r= rr l s "
z IMAP4.logoutc C s$ d}| j |||�\}}| j|||�S )z�List 'subscribed' mailbox names in directory matching pattern.
(typ, [data, ...]) = <instance>.lsub(directory='""', pattern='*')
'data' are tuples of message part envelope and data.
r& )r� r� )rR r� r� r� r� r� r< r< r= �lsub| s z
IMAP4.lsubc C s | j d|�\}}| j||d�S )z�Show my ACLs for a mailbox (i.e. the rights that I have on mailbox).
(typ, [data]) = <instance>.myrights(mailbox)
r# )r� r� )rR r� r� r� r< r< r= �myrights� s zIMAP4.myrightsc C s d}| j |�\}}| j|||�S )zb Returns IMAP namespaces ala rfc2342
(typ, [data, ...]) = <instance>.namespace()
r' )r� r� )rR r� r� r� r< r< r= � namespace� s zIMAP4.namespacec C s
| j d�S )zFSend NOOP command.
(typ, [data]) = <instance>.noop()
r( )r� )rR r< r< r= r� � s z
IMAP4.noopc C s( d}| j |||||�\}}| j||d�S )z�Fetch truncated part of a message.
(typ, [data, ...]) = <instance>.partial(message_num, message_part, start, length)
'data' is tuple of message part envelope and data.
r) r )r� r� )rR Z message_numZ message_part�startZlengthr� r� r� r< r< r= �partial� s z
IMAP4.partialc C s d}| j d|�S )z�Assume authentication as "user".
Allows an authorised administrator to proxy into any user's
mailbox.
(typ, [data]) = <instance>.proxyauth(user)
r* )r� )rR r� r� r< r< r= � proxyauth� s zIMAP4.proxyauthc C s | j d||�S )zkRename old mailbox name to new.
(typ, [data]) = <instance>.rename(oldmailbox, newmailbox)
r+ )r� )rR Z
oldmailboxZ
newmailboxr< r< r= �rename� s z IMAP4.renamec G sT d}|r2| j rtjd��| j|d|f|�� \}}n| j|f|�� \}}| j|||�S )z�Search mailbox for matching messages.
(typ, [data]) = <instance>.search(charset, criterion, ...)
'data' is space separated list of matching message numbers.
If UTF8 is enabled, charset MUST be None.
r, z'Non-None charset not valid in UTF8 mode�CHARSET)rW r r> r� r� )rR �charsetZcriteriar� r� r� r< r< r= �search� s
z IMAP4.searchr� Fc C sx i | _ || _|rd}nd}| j||�\}}|dkr@d| _||fS d| _d| j krd| rd| jd| ��|| j jdd g�fS )
at Select a mailbox.
Flush all untagged responses.
(typ, [data]) = <instance>.select(mailbox='INBOX', readonly=False)
'data' is count of messages in mailbox ('EXISTS' response).
Mandated responses are ('FLAGS', 'EXISTS', 'RECENT', 'UIDVALIDITY'), so
other responses should be obtained via <instance>.response('FLAGS') etc.
r r- ra r r z READ-ONLYz%s is not writable�EXISTSN)rG rI r� rD r@ �get)rR r� r@ r� r� r� r< r< r= �select� s
z IMAP4.selectc C s | j d|||�S )zZSet a mailbox acl.
(typ, [data]) = <instance>.setacl(mailbox, who, what)
r. )r� )rR r� r� Zwhatr< r< r= �setacl� s z IMAP4.setaclc G s | j d|�� \}}| j||d�S )z_(typ, [data]) = <instance>.setannotation(mailbox[, entry, attribute]+)
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setannotation� s zIMAP4.setannotationc C s | j d||�\}}| j||d�S )ziSet the quota root's resource limits.
(typ, [data]) = <instance>.setquota(root, limits)
r0 r� )r� r� )rR r� Zlimitsr� r� r< r< r= �setquota s zIMAP4.setquotac G sF d}|d |d fdkr d| }| j |||f|�� \}}| j|||�S ) z�IMAP4rev1 extension SORT command.
(typ, [data]) = <instance>.sort(sort_criteria, charset, search_criteria, ...)
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Nr2 zSSL support missingz TLS session already establishedzTLS not supported by serverra )�server_hostnamerw Tz Couldn't establish TLS session)�HAVE_SSLr> rK r? rh �ssl�_create_stdlib_contextr� � wrap_socketrx rS ry rz rf r� )rR � ssl_contextr� r� r� r< r< r= �starttls s$
zIMAP4.starttlsc C s$ d}| j |||�\}}| j|||�S )zpRequest named status conditions for mailbox.
(typ, [data]) = <instance>.status(mailbox, names)
r3 )r� r� )rR r� �namesr� r� r� r< r< r= �status5 s z IMAP4.statusc C s> |d |d fd kr d| }| j d|||�\}}| j||d�S )
z�Alters flag dispositions for messages in mailbox.
(typ, [data]) = <instance>.store(message_set, command, flags)
r r} r� r� z(%s)r4 r r� )r� r� )r� r� )rR r� �commandr� r� r� r< r< r= �storeA s z IMAP4.storec C s | j d|�S )zYSubscribe to new mailbox.
(typ, [data]) = <instance>.subscribe(mailbox)
r5 )r� )rR r� r< r< r= � subscribeL s zIMAP4.subscribec G s* d}| j |||f|�� \}}| j|||�S )z�IMAPrev1 extension THREAD command.
(type, [data]) = <instance>.thread(threading_algorithm, charset, search_criteria, ...)
r6 )r� r� )rR Zthreading_algorithmr� r� r� r� r� r< r< r= �threadT s z IMAP4.threadc G s� |j � }|tkr | jd| ��| jt| krL| jd|| jdjt| �f ��d}| j||f|�� \}}|d krt|}nd}| j|||�S )
z�Execute "command arg ..." with messages identified by UID,
rather than message number.
(typ, [data]) = <instance>.uid(command, arg1, arg2, ...)
Returns response appropriate to 'command'.
z Unknown IMAP4 UID command: %sz9command %s illegal in state %s, only allowed in states %sz, r7 r, r1 r6 r )r, r1 r6 )r� rk r> rD �joinr� r� )rR r� rs r� r� r� r< r< r= �uid^ s z IMAP4.uidc C s | j d|�S )z_Unsubscribe from old mailbox.
(typ, [data]) = <instance>.unsubscribe(mailbox)
r8 )r� )rR r� r< r< r= � unsubscribew s zIMAP4.unsubscribec G s, |j � }|tkr | jft|< | j|f|�� S )a Allow simple extension commands
notified by server in CAPABILITY response.
Assumes command is legal in current state.
(typ, [data]) = <instance>.xatom(name, arg, ...)
Returns response appropriate to extension command `name'.
)r� rk rD r� )rR r� rs r< r< r= �xatom s
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Manage shelves of pickled objects.
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module can handle. This includes most class instances, recursive data
types, and objects containing lots of shared sub-objects. The keys
are ordinary strings.
To summarize the interface (key is a string, data is an arbitrary
object):
import shelve
d = shelve.open(filename) # open, with (g)dbm filename -- no suffix
d[key] = data # store data at key (overwrites old data if
# using an existing key)
data = d[key] # retrieve a COPY of the data at key (raise
# KeyError if no such key) -- NOTE that this
# access returns a *copy* of the entry!
del d[key] # delete data stored at key (raises KeyError
# if no such key)
flag = key in d # true if the key exists
list = d.keys() # a list of all existing keys (slow!)
d.close() # close it
Dependent on the implementation, closing a persistent dictionary may
or may not be necessary to flush changes to disk.
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mutable entries are mutated: for example, if d[key] is a list,
d[key].append(anitem)
does NOT modify the entry d[key] itself, as stored in the persistent
mapping -- it only modifies the copy, which is then immediately
discarded, so that the append has NO effect whatsoever. To append an
item to d[key] in a way that will affect the persistent mapping, use:
data = d[key]
data.append(anitem)
d[key] = data
To avoid the problem with mutable entries, you may pass the keyword
argument writeback=True in the call to shelve.open. When you use:
d = shelve.open(filename, writeback=True)
then d keeps a cache of all entries you access, and writes them all back
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of memory for the cache, and it may make d.close() very slow, if you
access many of d's entries after opening it in this way: d has no way to
check which of the entries you access are mutable and/or which ones you
actually mutate, so it must cache, and write back at close, all of the
entries that you access. You can call d.sync() to write back all the
entries in the cache, and empty the cache (d.sync() also synchronizes
the persistent dictionary on disk, if feasible).
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This module provides some more Pythonic support for SSL.
Object types:
SSLSocket -- subtype of socket.socket which does SSL over the socket
Exceptions:
SSLError -- exception raised for I/O errors
Functions:
cert_time_to_seconds -- convert time string used for certificate
notBefore and notAfter functions to integer
seconds past the Epoch (the time values
returned from time.time())
fetch_server_certificate (HOST, PORT) -- fetch the certificate provided
by the server running on HOST at port PORT. No
validation of the certificate is performed.
Integer constants:
SSL_ERROR_ZERO_RETURN
SSL_ERROR_WANT_READ
SSL_ERROR_WANT_WRITE
SSL_ERROR_WANT_X509_LOOKUP
SSL_ERROR_SYSCALL
SSL_ERROR_SSL
SSL_ERROR_WANT_CONNECT
SSL_ERROR_EOF
SSL_ERROR_INVALID_ERROR_CODE
The following group define certificate requirements that one side is
allowing/requiring from the other side:
CERT_NONE - no certificates from the other side are required (or will
be looked at if provided)
CERT_OPTIONAL - certificates are not required, but if provided will be
validated, and if validation fails, the connection will
also fail
CERT_REQUIRED - certificates are required, and will be validated, and
if validation fails, the connection will also fail
The following constants identify various SSL protocol variants:
PROTOCOL_SSLv2
PROTOCOL_SSLv3
PROTOCOL_SSLv23
PROTOCOL_TLS
PROTOCOL_TLS_CLIENT
PROTOCOL_TLS_SERVER
PROTOCOL_TLSv1
PROTOCOL_TLSv1_1
PROTOCOL_TLSv1_2
The following constants identify various SSL alert message descriptions as per
http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-6
ALERT_DESCRIPTION_CLOSE_NOTIFY
ALERT_DESCRIPTION_UNEXPECTED_MESSAGE
ALERT_DESCRIPTION_BAD_RECORD_MAC
ALERT_DESCRIPTION_RECORD_OVERFLOW
ALERT_DESCRIPTION_DECOMPRESSION_FAILURE
ALERT_DESCRIPTION_HANDSHAKE_FAILURE
ALERT_DESCRIPTION_BAD_CERTIFICATE
ALERT_DESCRIPTION_UNSUPPORTED_CERTIFICATE
ALERT_DESCRIPTION_CERTIFICATE_REVOKED
ALERT_DESCRIPTION_CERTIFICATE_EXPIRED
ALERT_DESCRIPTION_CERTIFICATE_UNKNOWN
ALERT_DESCRIPTION_ILLEGAL_PARAMETER
ALERT_DESCRIPTION_UNKNOWN_CA
ALERT_DESCRIPTION_ACCESS_DENIED
ALERT_DESCRIPTION_DECODE_ERROR
ALERT_DESCRIPTION_DECRYPT_ERROR
ALERT_DESCRIPTION_PROTOCOL_VERSION
ALERT_DESCRIPTION_INSUFFICIENT_SECURITY
ALERT_DESCRIPTION_INTERNAL_ERROR
ALERT_DESCRIPTION_USER_CANCELLED
ALERT_DESCRIPTION_NO_RENEGOTIATION
ALERT_DESCRIPTION_UNSUPPORTED_EXTENSION
ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
ALERT_DESCRIPTION_UNRECOGNIZED_NAME
ALERT_DESCRIPTION_BAD_CERTIFICATE_STATUS_RESPONSE
ALERT_DESCRIPTION_BAD_CERTIFICATE_HASH_VALUE
ALERT_DESCRIPTION_UNKNOWN_PSK_IDENTITY
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FNTzcertfile must be specified) r� rf r� rv r� r� rQ �load_cert_chainr� r� r� )
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This class does not have a public constructor. Instances are returned by
``SSLContext.wrap_bio``. This class is typically used by framework authors
that want to implement asynchronous IO for SSL through memory buffers.
When compared to ``SSLSocket``, this object lacks the following features:
* Any form of network IO, including methods such as ``recv`` and ``send``.
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- unary plus, minus, abs
- compare to timedelta
- multiply, divide by int
In addition, datetime supports subtraction of two datetime objects
returning a timedelta, and addition or subtraction of a datetime
and a timedelta giving a datetime.
Representation: (days, seconds, microseconds). Why? Because I
felt like it.
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r' i@B i@B )rK r3 r5 )r� r r r �
total_seconds� s ztimedelta.total_secondsc C s | j S )rK )rz )r� r r r rK � s ztimedelta.daysc C s | j S )r3 )r{ )r� r r r r3 � s ztimedelta.secondsc C s | j S )r5 )r| )r� r r r r5 � s ztimedelta.microsecondsc C s2 t |t�r.t| j|j | j|j | j|j �S tS )N)rY rL rz r{ r| �NotImplemented)r� �otherr r r �__add__� s
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ztimedelta.__sub__c C s t |t�r| | S tS )N)rY rL r� )r� r� r r r �__rsub__ s
ztimedelta.__rsub__c C s t | j | j | j �S )N)rL rz r{ r| )r� r r r �__neg__ s ztimedelta.__neg__c C s | S )Nr )r� r r r �__pos__ s ztimedelta.__pos__c C s | j dk r| S | S d S )Nr )rz )r� r r r �__abs__ s
ztimedelta.__abs__c C s` t |t�r(t| j| | j| | j| �S t |t�r\| j� }|j� \}}tddt || |��S t
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ztimedelta.__floordiv__c C s~ t |tttf�stS | j� }t |t�r2||j� S t |t�rNtddt||��S t |t�rz|j� \}}tddt|| |��S d S )Nr )rY r` ra rL r� r� ry r� )r� r� r� ru rv r r r � __truediv__? s
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ztimedelta.__mod__c C s4 t |t�r0t| j� |j� �\}}|tdd|�fS tS )Nr )rY rL r! r� r� )r� r� rw rx r r r �
__divmod__Q s
ztimedelta.__divmod__c C s t |t�r| j|�dkS dS d S )Nr F)rY rL r )r� r� r r r �__eq__Z s
ztimedelta.__eq__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY rL r rt )r� r� r r r �__le__` s
ztimedelta.__le__c C s& t |t�r| j|�dk S t| |� d S )Nr )rY rL r rt )r� r� r r r �__lt__f s
ztimedelta.__lt__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY rL r rt )r� r� r r r �__ge__l s
ztimedelta.__ge__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY rL r rt )r� r� r r r �__gt__r s
ztimedelta.__gt__c C s t | j� |j� �S )N)r � _getstate)r� r� r r r r x s ztimedelta._cmpc C s | j dkrt| j� �| _ | j S )Nr r )r} �hashr� )r� r r r �__hash__| s
ztimedelta.__hash__c C s | j dkp | jdkp | jdkS )Nr )rz r{ r| )r� r r r �__bool__� s
ztimedelta.__bool__c C s | j | j| jfS )N)rz r{ r| )r� r r r r� � s ztimedelta._getstatec C s | j | j� fS )N)r� r� )r� r r r �
__reduce__� s ztimedelta.__reduce__N)rz r{ r| r} )r r r r r r r )%rd r� r� �__doc__� __slots__r� r� r� r� �propertyrK r3 r5 r� �__radd__r� r� r� r� r� r� �__rmul__r� r� r� r� r� r� r� r� r� r� r r� r� r� r� r r r r rL Q sD
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rL i�ɚ;rj rk i?B )rK r1 r2 r3 r5 )r5 c @ s( e Zd ZdZdCZdDdd�Zed d
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d� �Z dd� Z
dd� Z dd� Z dd� Z
dd� ZeZedd� �Zedd � �Zed d � �Zd d � Zd!d"� ZdEd#d$�Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Z d1d2� Z d3d4� Z e Z d5d6� Z d7d8� Z!d9d:� Z"d;d<� Z#d=d>� Z$d?d@� Z%dAdB� Z&dS )F�datea� Concrete date type.
Constructors:
__new__()
fromtimestamp()
today()
fromordinal()
Operators:
__repr__, __str__
__eq__, __le__, __lt__, __ge__, __gt__, __hash__
__add__, __radd__, __sub__ (add/radd only with timedelta arg)
Methods:
timetuple()
toordinal()
weekday()
isoweekday(), isocalendar(), isoformat()
ctime()
strftime()
Properties (readonly):
year, month, day
�_year�_month�_dayr} Nc C s� |dkr�t |ttf�r�t|�dkr�dt|dd� � ko@dkn r�t |t�r|y|jd�}W n tk
rz td��Y nX tj | �}|j
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|_ |S ) zVConstructor.
Arguments:
year, month, day (required, base 1)
Nr r r r r �latin1znFailed to encode latin1 string when unpickling a date object. pickle.load(data, encoding='latin1') is assumed.r r )rY �bytesrZ rH �ord�encode�UnicodeEncodeErrorr7 rP r� �_date__setstater} ri r� r� r� )r� r r r r� r r r r� � s( $
z date.__new__c C s( t j|�\ }}}}}}}} }
| |||�S )z;Construct a date from a POSIX timestamp (like time.time()).)r) � localtime) r� �tr r* r+ r, r- r. �weekday�jday�dstr r r �
fromtimestamp� s zdate.fromtimestampc C s t j� }| j|�S )z"Construct a date from time.time().)r) �timer� )r� r� r r r �today� s z
date.todayc C s t |�\}}}| |||�S )z�Construct a date from a proleptic Gregorian ordinal.
January 1 of year 1 is day 1. Only the year, month and day are
non-zero in the result.
)r& )r� r% r r* r+ r r r � fromordinal� s zdate.fromordinalc C s d| j j| j j| j| j| jf S )a5 Convert to formal string, for repr().
>>> dt = datetime(2010, 1, 1)
>>> repr(dt)
'datetime.datetime(2010, 1, 1, 0, 0)'
>>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
>>> repr(dt)
'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
z%s.%s(%d, %d, %d))r� r� r� r� r� r� )r� r r r r� � s
z
date.__repr__c C s. | j � d pd}dt| t| j | j| jf S )z Return ctime() style string.r( z%s %s %2d 00:00:00 %04d)� toordinal� _DAYNAMES� _MONTHNAMESr� r� r� )r� r� r r r �ctime s
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date.ctimec C s t | || j� �S )zFormat using strftime().)rX rQ )r� r; r r r rO s z
date.strftimec C s: t |t�s tdt|�j ��t|�dkr2| j|�S t| �S )Nzmust be str, not %sr )rY rZ r[ r\ rd rH rO )r� r; r r r �
__format__
s
zdate.__format__c C s d| j | j| jf S )z�Return the date formatted according to ISO.
This is 'YYYY-MM-DD'.
References:
- http://www.w3.org/TR/NOTE-datetime
- http://www.cl.cam.ac.uk/~mgk25/iso-time.html
z%04d-%02d-%02d)r� r� r� )r� r r r � isoformat s zdate.isoformatc C s | j S )z
year (1-9999))r� )r� r r r r " s z date.yearc C s | j S )z month (1-12))r� )r� r r r r ' s z
date.monthc C s | j S )z
day (1-31))r� )r� r r r r , s zdate.dayc C s t | j| j| jdddd�S )z9Return local time tuple compatible with time.localtime().r r r )r/ r� r� r� )r� r r r rQ 4 s zdate.timetuplec C s t | j| j| j�S )z�Return proleptic Gregorian ordinal for the year, month and day.
January 1 of year 1 is day 1. Only the year, month and day values
contribute to the result.
)r r� r� r� )r� r r r r� 9 s zdate.toordinalc C s: |dkr| j }|dkr | j}|dkr*| j}t| �|||�S )z;Return a new date with new values for the specified fields.N)r� r� r� r\ )r� r r r r r r rM A s z date.replacec C s t |t�r| j|�dkS tS )Nr )rY r� r r� )r� r� r r r r� M s
z date.__eq__c C s t |t�r| j|�dkS tS )Nr )rY r� r r� )r� r� r r r r� R s
z date.__le__c C s t |t�r| j|�dk S tS )Nr )rY r� r r� )r� r� r r r r� W s
z date.__lt__c C s t |t�r| j|�dkS tS )Nr )rY r� r r� )r� r� r r r r� \ s
z date.__ge__c C s t |t�r| j|�dkS tS )Nr )rY r� r r� )r� r� r r r r� a s
z date.__gt__c C sB | j | j| j }}}|j |j|j }}}t|||f|||f�S )N)r� r� r� r )r� r� r r* r+ Zy2�m2Zd2r r r r f s z date._cmpc C s | j dkrt| j� �| _ | j S )zHash.r r )r} r� r� )r� r r r r� l s
z
date.__hash__c C sF t |t�rB| j� |j }d| k o*tkn r:tj|�S td��tS )zAdd a date to a timedelta.r zresult out of range) rY rL r� rK � _MAXORDINALr� r� r� r� )r� r� �or r r r� t s
z date.__add__c C sD t |t�r| t|j � S t |t�r@| j� }|j� }t|| �S tS )z.Subtract two dates, or a date and a timedelta.)rY rL rK r� r� r� )r� r� �days1�days2r r r r� s
z date.__sub__c C s | j � d d S )z:Return day of the week, where Monday == 0 ... Sunday == 6.r' r( )r� )r� r r r r� � s z date.weekdayc C s | j � d pdS )z:Return day of the week, where Monday == 1 ... Sunday == 7.r( )r� )r� r r r �
isoweekday� s zdate.isoweekdayc C s� | j }t|�}t| j | j| j�}t|| d�\}}|dk r^|d8 }t|�}t|| d�\}}n$|dkr�|t|d �kr�|d7 }d}||d |d fS )a� Return a 3-tuple containing ISO year, week number, and weekday.
The first ISO week of the year is the (Mon-Sun) week
containing the year's first Thursday; everything else derives
from that.
The first week is 1; Monday is 1 ... Sunday is 7.
ISO calendar algorithm taken from
http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
(used with permission)
r( r r �4 )r� �_isoweek1mondayr r� r� r! )r� r � week1mondayr� Zweekr r r r � isocalendar� s
zdate.isocalendarc C s& t | jd�\}}t||| j| jg�fS )N� )r! r� r� r� r� )r� �yhi�ylor r r r� � s zdate._getstatec C s" |\}}| _ | _|d | | _d S )Nr� )r� r� r� )r� �stringr� r� r r r �
__setstate� s zdate.__setstatec C s | j | j� fS )N)r� r� )r� r r r r� � s zdate.__reduce__)r� r� r� r} )NN)NNN)'rd r� r� r� r� r� � classmethodr� r� r� r� r� rO r� r� r� r� r r r rQ r� rM r� r� r� r� r� r r� r� r� r� r� r� r� r� r� r� r r r r r� � sD
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r� r )rK c @ s< e Zd ZdZf Zdd� Zdd� Zdd� Zdd � Zd
d � Z d S )
rq z}Abstract base class for time zone info classes.
Subclasses must override the name(), utcoffset() and dst() methods.
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tzinfo.tznamec C s t d��dS )z:datetime -> minutes east of UTC (negative for west of UTC)z)tzinfo subclass must override utcoffset()N)r� )r� r� r r r rB � s ztzinfo.utcoffsetc C s t d��dS )z�datetime -> DST offset in minutes east of UTC.
Return 0 if DST not in effect. utcoffset() must include the DST
offset.
z#tzinfo subclass must override dst()N)r� )r� r� r r r r� � s z
tzinfo.dstc C s� t |t�std��|j| k r$td��|j� }|dkr<td��|j� }|dkrTtd��|| }|r�||7 }|j� }|dkr�td��|| S )z*datetime in UTC -> datetime in local time.z&fromutc() requires a datetime argumentzdt.tzinfo is not selfNz0fromutc() requires a non-None utcoffset() resultz*fromutc() requires a non-None dst() resultz;fromutc(): dt.dst gave inconsistent results; cannot convert)rY �datetimer[ rq r7 rB r� )r� r� ZdtoffZdtdst�deltar r r �fromutc� s"
ztzinfo.fromutcc C sf t | dd �}|r|� }nf }t | dd �}|r4|� }nt | dd �pBd }|d krV| j|fS | j||fS d S )N�__getinitargs__� __getstate__�__dict__)rI r� )r� Z getinitargs�args�getstate�stater r r r� � s
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rd r� r� r� r� rF rB r� r� r� r r r r rq � s rq c @ s e Zd ZdZdGZdHd d �d d
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S )Nr� a< Time with time zone.
Constructors:
__new__()
Operators:
__repr__, __str__
__eq__, __le__, __lt__, __ge__, __gt__, __hash__
Methods:
strftime()
isoformat()
utcoffset()
tzname()
dst()
Properties (readonly):
hour, minute, second, microsecond, tzinfo, fold
�_hour�_minute�_second� _microsecond�_tzinfor} �_foldr N)ro c C s� t |ttf�r�t|�dkr�t|dd� �d@ dk r�t |t�rhy|jd�}W n tk
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|_ ||_|S ) z�Constructor.
Arguments:
hour, minute (required)
second, microsecond (default to zero)
tzinfo (default to None)
fold (keyword only, default to zero)
r' r r � r r� znFailed to encode latin1 string when unpickling a time object. pickle.load(data, encoding='latin1') is assumed.Nr r )rY r� rZ rH r� r� r� r7 rP r� �_time__setstater} rp rs r� r� r� r� r� r� )r� rl rm rn r? rq ro r� r r r r� # s0
z time.__new__c C s | j S )z hour (0-23))r� )r� r r r rl K s z time.hourc C s | j S )z
minute (0-59))r� )r� r r r rm P s z time.minutec C s | j S )z
second (0-59))r� )r� r r r rn U s z time.secondc C s | j S )zmicrosecond (0-999999))r� )r� r r r r? Z s ztime.microsecondc C s | j S )ztimezone info object)r� )r� r r r rq _ s z time.tzinfoc C s | j S )N)r� )r� r r r ro d s z time.foldc C s$ t |t�r | j|dd�dkS dS d S )NT)� allow_mixedr F)rY r� r )r� r� r r r r� l s
z time.__eq__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY r� r rt )r� r� r r r r� r s
z time.__le__c C s& t |t�r| j|�dk S t| |� d S )Nr )rY r� r rt )r� r� r r r r� x s
z time.__lt__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY r� r rt )r� r� r r r r� ~ s
z time.__ge__c C s& t |t�r| j|�dkS t| |� d S )Nr )rY r� r rt )r� r� r r r r� � s
z time.__gt__Fc
C s� | j }|j }d }}||kr"d}n| j� }|j� }||k}|rht| j| j| j| jf|j|j|j|jf�S |d ksx|d kr�|r�dS td��| jd | j |tdd� }|jd |j |tdd� } t|| j| jf| |j|jf�S )NTr z$cannot compare naive and aware timesr~ r )r2 ) r� rB r r� r� r� r� r[ rL )
r� r� r� �mytz�ottz�myoff�otoff� base_compareZmyhhmmZothhmmr r r r � s*
z time._cmpc C s� | j dkr�| jr | jdd�}n| }|j� }|sBt|j� d �| _ nztt| j| j d�| tdd��\}}|tdd� }d| ko�dk n r�tt
||| j | j ��| _ nt||| j | j f�| _ | j S ) zHash.r r )ro )r1 r2 )r1 )r2 r r )
r} ro rM rB r� r� r! rL rl rm r� rn r? )r� r� �tzoffrV r* r r r r� � s
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time.__hash__�:c C sx | j � }|dk rt|jdk r&d}| }nd}t|tdd��\}}t|tdd��\}}d||||f }|rt|d |j 7 }|S )
z2Return formatted timezone offset (+xx:xx) or None.Nr rD rC r )r1 )r2 z %s%02d%s%02dz:%02d)rB rK r! rL r3 )r� �sep�offrU r, r- r. r r r �_tzstr� s
z time._tzstrc C s� | j dkr d| j| j f }n| jdkr2d| j }nd}d| jj| jj| j| j|f }| jdk rx|dd � d| j d }| jr�|dd � d
}|S )
z%Convert to formal string, for repr().r z, %d, %dz, %drA z%s.%s(%d, %d%s)Nr z , tzinfo=%r�)z , fold=1)r r ) r� r� r� r� r� r� r� r� r� )r� rW r r r r� � s
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time.__repr__r0 c C s0 t | j| j| j| j|�}| j� }|r,||7 }|S )a' Return the time formatted according to ISO.
The full format is 'HH:MM:SS.mmmmmm+zz:zz'. By default, the fractional
part is omitted if self.microsecond == 0.
The optional argument timespec specifies the number of additional
terms of the time to include.
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ztime.isoformatc C s( ddd| j | j| jdddf }t| ||�S )z{Format using strftime(). The date part of the timestamp passed
to underlying strftime should not be used.
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time.strftimec C s: t |t�s tdt|�j ��t|�dkr2| j|�S t| �S )Nzmust be str, not %sr )rY rZ r[ r\ rd rH rO )r� r; r r r r� � s
ztime.__format__c C s( | j dkrdS | j jd�}td|� |S )zQReturn the timezone offset in minutes east of UTC (negative west of
UTC).NrB )r� rB r_ )r� rT r r r rB s
ztime.utcoffsetc C s& | j dkrdS | j jd�}t|� |S )a Return the timezone name.
Note that the name is 100% informational -- there's no requirement that
it mean anything in particular. For example, "GMT", "UTC", "-500",
"-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.
N)r� rF r^ )r� r] r r r rF s
z time.tznamec C s( | j dkrdS | j jd�}td|� |S )af Return 0 if DST is not in effect, or the DST offset (in minutes
eastward) if DST is in effect.
This is purely informational; the DST offset has already been added to
the UTC offset returned by utcoffset() if applicable, so there's no
need to consult dst() unless you're interested in displaying the DST
info.
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�r2 Y nX ed'k�rRd"d lZeej� � d S )*uo Heap queues
[explanation by François Pinard]
Heaps are arrays for which a[k] <= a[2*k+1] and a[k] <= a[2*k+2] for
all k, counting elements from 0. For the sake of comparison,
non-existing elements are considered to be infinite. The interesting
property of a heap is that a[0] is always its smallest element.
The strange invariant above is meant to be an efficient memory
representation for a tournament. The numbers below are `k', not a[k]:
0
1 2
3 4 5 6
7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
In the tree above, each cell `k' is topping `2*k+1' and `2*k+2'. In
a usual binary tournament we see in sports, each cell is the winner
over the two cells it tops, and we can trace the winner down the tree
to see all opponents s/he had. However, in many computer applications
of such tournaments, we do not need to trace the history of a winner.
To be more memory efficient, when a winner is promoted, we try to
replace it by something else at a lower level, and the rule becomes
that a cell and the two cells it tops contain three different items,
but the top cell "wins" over the two topped cells.
If this heap invariant is protected at all time, index 0 is clearly
the overall winner. The simplest algorithmic way to remove it and
find the "next" winner is to move some loser (let's say cell 30 in the
diagram above) into the 0 position, and then percolate this new 0 down
the tree, exchanging values, until the invariant is re-established.
This is clearly logarithmic on the total number of items in the tree.
By iterating over all items, you get an O(n ln n) sort.
A nice feature of this sort is that you can efficiently insert new
items while the sort is going on, provided that the inserted items are
not "better" than the last 0'th element you extracted. This is
especially useful in simulation contexts, where the tree holds all
incoming events, and the "win" condition means the smallest scheduled
time. When an event schedule other events for execution, they are
scheduled into the future, so they can easily go into the heap. So, a
heap is a good structure for implementing schedulers (this is what I
used for my MIDI sequencer :-).
Various structures for implementing schedulers have been extensively
studied, and heaps are good for this, as they are reasonably speedy,
the speed is almost constant, and the worst case is not much different
than the average case. However, there are other representations which
are more efficient overall, yet the worst cases might be terrible.
Heaps are also very useful in big disk sorts. You most probably all
know that a big sort implies producing "runs" (which are pre-sorted
sequences, which size is usually related to the amount of CPU memory),
followed by a merging passes for these runs, which merging is often
very cleverly organised[1]. It is very important that the initial
sort produces the longest runs possible. Tournaments are a good way
to that. If, using all the memory available to hold a tournament, you
replace and percolate items that happen to fit the current run, you'll
produce runs which are twice the size of the memory for random input,
and much better for input fuzzily ordered.
Moreover, if you output the 0'th item on disk and get an input which
may not fit in the current tournament (because the value "wins" over
the last output value), it cannot fit in the heap, so the size of the
heap decreases. The freed memory could be cleverly reused immediately
for progressively building a second heap, which grows at exactly the
same rate the first heap is melting. When the first heap completely
vanishes, you switch heaps and start a new run. Clever and quite
effective!
In a word, heaps are useful memory structures to know. I use them in
a few applications, and I think it is good to keep a `heap' module
around. :-)
--------------------
[1] The disk balancing algorithms which are current, nowadays, are
more annoying than clever, and this is a consequence of the seeking
capabilities of the disks. On devices which cannot seek, like big
tape drives, the story was quite different, and one had to be very
clever to ensure (far in advance) that each tape movement will be the
most effective possible (that is, will best participate at
"progressing" the merge). Some tapes were even able to read
backwards, and this was also used to avoid the rewinding time.
Believe me, real good tape sorts were quite spectacular to watch!
From all times, sorting has always been a Great Art! :-)
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as a little-endian 2's-complement long. If the size is 0, that's taken
as a shortcut for the int 0, although LONG1 should really be used
then instead (and in any case where # of bytes < 256).
c @ s e Zd Zd Zdd� Zdd� ZdS )
� StackObjectr �obtyper c C s. || _ t|t�r x |D ]}qW || _|| _d S )N)r �
isinstance�tuplerd r )r r rd r Z containedr r r r � s
zStackObject.__init__c C s | j S )N)r )r r r r �__repr__� s zStackObject.__repr__N)r rd r )r r r r r rg r r r r rc � s
rc rR zA Python integer object.)r rd r Z int_or_boolz#A Python integer or boolean object.�boolzA Python boolean object.rY zA Python float object.Z bytes_or_strz*A Python bytes or (Unicode) string object.�byteszA Python bytes object.rH z!A Python (Unicode) string object.�NonezThe Python None object.rf zA Python tuple object.�listzA Python list object.�dictzA Python dict object.�setzA Python set object.� frozensetzA Python frozenset object.�anyz Any kind of object whatsoever.Zmarkaz 'The mark' is a unique object.
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or pull it off the stack. Instead the MARK opcode is used
to push a special marker object on the stack, and then
some other opcodes grab all the objects from the top of
the stack down to (but not including) the topmost marker
object.
�
stackslicea� An object representing a contiguous slice of the stack.
This is used in conjunction with markobject, to represent all
of the stack following the topmost markobject. For example,
the POP_MARK opcode changes the stack from
[..., markobject, stackslice]
to
[...]
No matter how many object are on the stack after the topmost
markobject, POP_MARK gets rid of all of them (including the
topmost markobject too).
c @ s e Zd Zd Zdd � Zd
S ) �
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and LONG then is that INT skips a trailing 'L', and produces a short
int whenever possible.
Another difference is due to that, when bool was introduced as a
distinct type in 2.3, builtin names True and False were also added to
2.2.2, mapping to ints 1 and 0. For compatibility in both directions,
True gets pickled as INT + "I01\n", and False as INT + "I00\n".
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earlier unpicklers ignore the leading "0" and return the int.
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This handles the full range of Python (short) integers on a 32-bit
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BININT1 or BININT2 saves space.
ZBININT1�Kz�Push a one-byte unsigned integer.
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ZBININT2�Mz�Push a two-byte unsigned integer.
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ZLONG�La� Push a long integer.
The same as INT, except that the literal ends with 'L', and always
unpickles to a Python long. There doesn't seem a real purpose to the
trailing 'L'.
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unpickling (this is simply due to the nature of decimal->binary
conversion). Proto 2 added linear-time (in C; still quadratic-time
in Python) LONG1 and LONG4 opcodes.
ZLONG1� z|Long integer using one-byte length.
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The argument is a repr-style string, with bracketing quote characters,
and perhaps embedded escapes. The argument extends until the next
newline character. These are usually decoded into a str instance
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'ASCII'. If the encoding given was 'bytes' however, they will be
decoded as bytes object instead.
Z BINSTRING�Ta� Push a Python string object.
There are two arguments: the first is a 4-byte little-endian
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second is that many bytes, which are taken literally as the string
content. These are usually decoded into a str instance using the
encoding given to the Unpickler constructor. or the default,
'ASCII'. If the encoding given was 'bytes' however, they will be
decoded as bytes object instead.
ZSHORT_BINSTRING�Ua� Push a Python string object.
There are two arguments: the first is a 1-byte unsigned int giving
the number of bytes in the string, and the second is that many
bytes, which are taken literally as the string content. These are
usually decoded into a str instance using the encoding given to
the Unpickler constructor. or the default, 'ASCII'. If the
encoding given was 'bytes' however, they will be decoded as bytes
object instead.
ZBINBYTES�Bz�Push a Python bytes object.
There are two arguments: the first is a 4-byte little-endian unsigned int
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taken literally as the bytes content.
ZSHORT_BINBYTES�Cz�Push a Python bytes object.
There are two arguments: the first is a 1-byte unsigned int giving
the number of bytes, and the second is that many bytes, which are taken
literally as the string content.
Z BINBYTES8� z�Push a Python bytes object.
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the number of bytes in the string, and the second is that many bytes,
which are taken literally as the string content.
ZNONE�NzPush None on the stack.ZNEWTRUE� zPush True onto the stack.ZNEWFALSE� zPush False onto the stack.�UNICODE�Vz�Push a Python Unicode string object.
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ZSHORT_BINUNICODE� a Push a Python Unicode string object.
There are two arguments: the first is a 1-byte little-endian signed int
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bytes, and is the UTF-8 encoding of the Unicode string.
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BINUNICODE�Xa Push a Python Unicode string object.
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bytes, and is the UTF-8 encoding of the Unicode string.
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The argument is repr(a_float), and in general requires 17 significant
digits for roundtrip conversion to be an identity (this is so for
IEEE-754 double precision values, which is what Python float maps to
on most boxes).
In general, FLOAT cannot be used to transport infinities, NaNs, or
minus zero across boxes (or even on a single box, if the platform C
library can't read the strings it produces for such things -- Windows
is like that), but may do less damage than BINFLOAT on boxes with
greater precision or dynamic range than IEEE-754 double.
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an IEEE-754 double, and retains no more than 53 bits of precision (if
there are more than that, "add a half and chop" rounding is used to
cut it back to 53 significant bits).
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z�Build a one-tuple out of the topmost item on the stack.
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ZTUPLE3� a Build a three-tuple out of the top three items on the stack.
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words:
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EMPTY_DICT�}zPush an empty dict.ZDICT�da� Build a dict out of the topmost stack slice, after markobject.
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The slice of the stack following the topmost markobject is taken as
an alternating sequence of keys and values, added to the dict
immediately under the topmost markobject. Everything at and after the
topmost markobject is popped, leaving the mutated dict at the top
of the stack.
Stack before: ... pydict markobject key_1 value_1 ... key_n value_n
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where pydict has been modified via pydict[key_i] = value_i for i in
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The slice of the stack following the topmost markobject is taken as
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leaving the mutated set at the top of the stack.
Stack before: ... pyset markobject item_1 ... item_n
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where pyset has been modified via pyset.add(item_i) = item_i for i in
1, 2, ..., n, and in that order.
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All the stack entries following the topmost markobject are placed into
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�POP�0z<Discard the top stack item, shrinking the stack by one item.ZDUP�2z=Push the top stack item onto the stack again, duplicating it.�MARK�(z�Push markobject onto the stack.
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to work on. See markobject.doc for more detail.
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POP_MARK is used to remove those objects, and to remove the markobject
that delimited their starting position on the stack.
�GET�gz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the newline-terminated
decimal string following. BINGET and LONG_BINGET are space-optimized
versions.
�BINGET�hz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 1-byte unsigned
integer following.
� LONG_BINGET�jz�Read an object from the memo and push it on the stack.
The index of the memo object to push is given by the 4-byte unsigned
little-endian integer following.
�PUT�pz�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the newline-
terminated decimal string following. BINPUT and LONG_BINPUT are
space-optimized versions.
�BINPUTr5 z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 1-byte
unsigned integer following.
� LONG_BINPUT�rz�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write into is given by the 4-byte
unsigned little-endian integer following.
�MEMOIZE� z�Store the stack top into the memo. The stack is not popped.
The index of the memo location to write is the number of
elements currently present in the memo.
ZEXT1� a� Extension code.
This code and the similar EXT2 and EXT4 allow using a registry
of popular objects that are pickled by name, typically classes.
It is envisioned that through a global negotiation and
registration process, third parties can set up a mapping between
ints and object names.
In order to guarantee pickle interchangeability, the extension
code registry ought to be global, although a range of codes may
be reserved for private use.
EXT1 has a 1-byte integer argument. This is used to index into the
extension registry, and the object at that index is pushed on the stack.
ZEXT2� zNExtension code.
See EXT1. EXT2 has a two-byte integer argument.
ZEXT4� zOExtension code.
See EXT1. EXT4 has a four-byte integer argument.
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Two newline-terminated strings follow the GLOBAL opcode. The first is
taken as a module name, and the second as a class name. The class
object module.class is pushed on the stack. More accurately, the
object returned by self.find_class(module, class) is pushed on the
stack, so unpickling subclasses can override this form of lookup.
Z STACK_GLOBAL� z7Push a global object (module.attr) on the stack.
ZREDUCE�RaL Push an object built from a callable and an argument tuple.
The opcode is named to remind of the __reduce__() method.
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The callable and the argument tuple are the first two items returned
by a __reduce__ method. Applying the callable to the argtuple is
supposed to reproduce the original object, or at least get it started.
If the __reduce__ method returns a 3-tuple, the last component is an
argument to be passed to the object's __setstate__, and then the REDUCE
opcode is followed by code to create setstate's argument, and then a
BUILD opcode to apply __setstate__ to that argument.
If not isinstance(callable, type), REDUCE complains unless the
callable has been registered with the copyreg module's
safe_constructors dict, or the callable has a magic
'__safe_for_unpickling__' attribute with a true value. I'm not sure
why it does this, but I've sure seen this complaint often enough when
I didn't want to <wink>.
ZBUILD�ba� Finish building an object, via __setstate__ or dict update.
Stack before: ... anyobject argument
Stack after: ... anyobject
where anyobject may have been mutated, as follows:
If the object has a __setstate__ method,
anyobject.__setstate__(argument)
is called.
Else the argument must be a dict, the object must have a __dict__, and
the object is updated via
anyobject.__dict__.update(argument)
ZINST�iaq Build a class instance.
This is the protocol 0 version of protocol 1's OBJ opcode.
INST is followed by two newline-terminated strings, giving a
module and class name, just as for the GLOBAL opcode (and see
GLOBAL for more details about that). self.find_class(module, name)
is used to get a class object.
In addition, all the objects on the stack following the topmost
markobject are gathered into a tuple and popped (along with the
topmost markobject), just as for the TUPLE opcode.
Now it gets complicated. If all of these are true:
+ The argtuple is empty (markobject was at the top of the stack
at the start).
+ The class object does not have a __getinitargs__ attribute.
then we want to create an old-style class instance without invoking
its __init__() method (pickle has waffled on this over the years; not
calling __init__() is current wisdom). In this case, an instance of
an old-style dummy class is created, and then we try to rebind its
__class__ attribute to the desired class object. If this succeeds,
the new instance object is pushed on the stack, and we're done.
Else (the argtuple is not empty, it's not an old-style class object,
or the class object does have a __getinitargs__ attribute), the code
first insists that the class object have a __safe_for_unpickling__
attribute. Unlike as for the __safe_for_unpickling__ check in REDUCE,
it doesn't matter whether this attribute has a true or false value, it
only matters whether it exists (XXX this is a bug). If
__safe_for_unpickling__ doesn't exist, UnpicklingError is raised.
Else (the class object does have a __safe_for_unpickling__ attr),
the class object obtained from INST's arguments is applied to the
argtuple obtained from the stack, and the resulting instance object
is pushed on the stack.
NOTE: checks for __safe_for_unpickling__ went away in Python 2.3.
NOTE: the distinction between old-style and new-style classes does
not make sense in Python 3.
ZOBJ�oa� Build a class instance.
This is the protocol 1 version of protocol 0's INST opcode, and is
very much like it. The major difference is that the class object
is taken off the stack, allowing it to be retrieved from the memo
repeatedly if several instances of the same class are created. This
can be much more efficient (in both time and space) than repeatedly
embedding the module and class names in INST opcodes.
Unlike INST, OBJ takes no arguments from the opcode stream. Instead
the class object is taken off the stack, immediately above the
topmost markobject:
Stack before: ... markobject classobject stackslice
Stack after: ... new_instance_object
As for INST, the remainder of the stack above the markobject is
gathered into an argument tuple, and then the logic seems identical,
except that no __safe_for_unpickling__ check is done (XXX this is
a bug). See INST for the gory details.
NOTE: In Python 2.3, INST and OBJ are identical except for how they
get the class object. That was always the intent; the implementations
had diverged for accidental reasons.
ZNEWOBJ� aL Build an object instance.
The stack before should be thought of as containing a class
object followed by an argument tuple (the tuple being the stack
top). Call these cls and args. They are popped off the stack,
and the value returned by cls.__new__(cls, *args) is pushed back
onto the stack.
Z NEWOBJ_EX� au Build an object instance.
The stack before should be thought of as containing a class
object followed by an argument tuple and by a keyword argument dict
(the dict being the stack top). Call these cls and args. They are
popped off the stack, and the value returned by
cls.__new__(cls, *args, *kwargs) is pushed back onto the stack.
�PROTO� z�Protocol version indicator.
For protocol 2 and above, a pickle must start with this opcode.
The argument is the protocol version, an int in range(2, 256).
ZSTOP�.z�Stop the unpickling machine.
Every pickle ends with this opcode. The object at the top of the stack
is popped, and that's the result of unpickling. The stack should be
empty then.
�FRAME� z�Indicate the beginning of a new frame.
The unpickler may use this opcode to safely prefetch data from its
underlying stream.
ZPERSID�Pa Push an object identified by a persistent ID.
The pickle module doesn't define what a persistent ID means. PERSID's
argument is a newline-terminated str-style (no embedded escapes, no
bracketing quote characters) string, which *is* "the persistent ID".
The unpickler passes this string to self.persistent_load(). Whatever
object that returns is pushed on the stack. There is no implementation
of persistent_load() in Python's unpickler: it must be supplied by an
unpickler subclass.
Z BINPERSID�QaX Push an object identified by a persistent ID.
Like PERSID, except the persistent ID is popped off the stack (instead
of being a string embedded in the opcode bytestream). The persistent
ID is passed to self.persistent_load(), and whatever object that
returns is pushed on the stack. See PERSID for more detail.
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>>> import pickle
>>> x = [1, 2, (3, 4), {b'abc': "def"}]
>>> pkl0 = pickle.dumps(x, 0)
>>> dis(pkl0)
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: L LONG 1
9: a APPEND
10: L LONG 2
14: a APPEND
15: ( MARK
16: L LONG 3
20: L LONG 4
24: t TUPLE (MARK at 15)
25: p PUT 1
28: a APPEND
29: ( MARK
30: d DICT (MARK at 29)
31: p PUT 2
34: c GLOBAL '_codecs encode'
50: p PUT 3
53: ( MARK
54: V UNICODE 'abc'
59: p PUT 4
62: V UNICODE 'latin1'
70: p PUT 5
73: t TUPLE (MARK at 53)
74: p PUT 6
77: R REDUCE
78: p PUT 7
81: V UNICODE 'def'
86: p PUT 8
89: s SETITEM
90: a APPEND
91: . STOP
highest protocol among opcodes = 0
Try again with a "binary" pickle.
>>> pkl1 = pickle.dumps(x, 1)
>>> dis(pkl1)
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: K BININT1 1
6: K BININT1 2
8: ( MARK
9: K BININT1 3
11: K BININT1 4
13: t TUPLE (MARK at 8)
14: q BINPUT 1
16: } EMPTY_DICT
17: q BINPUT 2
19: c GLOBAL '_codecs encode'
35: q BINPUT 3
37: ( MARK
38: X BINUNICODE 'abc'
46: q BINPUT 4
48: X BINUNICODE 'latin1'
59: q BINPUT 5
61: t TUPLE (MARK at 37)
62: q BINPUT 6
64: R REDUCE
65: q BINPUT 7
67: X BINUNICODE 'def'
75: q BINPUT 8
77: s SETITEM
78: e APPENDS (MARK at 3)
79: . STOP
highest protocol among opcodes = 1
Exercise the INST/OBJ/BUILD family.
>>> import pickletools
>>> dis(pickle.dumps(pickletools.dis, 0))
0: c GLOBAL 'pickletools dis'
17: p PUT 0
20: . STOP
highest protocol among opcodes = 0
>>> from pickletools import _Example
>>> x = [_Example(42)] * 2
>>> dis(pickle.dumps(x, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: c GLOBAL 'copy_reg _reconstructor'
30: p PUT 1
33: ( MARK
34: c GLOBAL 'pickletools _Example'
56: p PUT 2
59: c GLOBAL '__builtin__ object'
79: p PUT 3
82: N NONE
83: t TUPLE (MARK at 33)
84: p PUT 4
87: R REDUCE
88: p PUT 5
91: ( MARK
92: d DICT (MARK at 91)
93: p PUT 6
96: V UNICODE 'value'
103: p PUT 7
106: L LONG 42
111: s SETITEM
112: b BUILD
113: a APPEND
114: g GET 5
117: a APPEND
118: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(x, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: c GLOBAL 'copy_reg _reconstructor'
29: q BINPUT 1
31: ( MARK
32: c GLOBAL 'pickletools _Example'
54: q BINPUT 2
56: c GLOBAL '__builtin__ object'
76: q BINPUT 3
78: N NONE
79: t TUPLE (MARK at 31)
80: q BINPUT 4
82: R REDUCE
83: q BINPUT 5
85: } EMPTY_DICT
86: q BINPUT 6
88: X BINUNICODE 'value'
98: q BINPUT 7
100: K BININT1 42
102: s SETITEM
103: b BUILD
104: h BINGET 5
106: e APPENDS (MARK at 3)
107: . STOP
highest protocol among opcodes = 1
Try "the canonical" recursive-object test.
>>> L = []
>>> T = L,
>>> L.append(T)
>>> L[0] is T
True
>>> T[0] is L
True
>>> L[0][0] is L
True
>>> T[0][0] is T
True
>>> dis(pickle.dumps(L, 0))
0: ( MARK
1: l LIST (MARK at 0)
2: p PUT 0
5: ( MARK
6: g GET 0
9: t TUPLE (MARK at 5)
10: p PUT 1
13: a APPEND
14: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(L, 1))
0: ] EMPTY_LIST
1: q BINPUT 0
3: ( MARK
4: h BINGET 0
6: t TUPLE (MARK at 3)
7: q BINPUT 1
9: a APPEND
10: . STOP
highest protocol among opcodes = 1
Note that, in the protocol 0 pickle of the recursive tuple, the disassembler
has to emulate the stack in order to realize that the POP opcode at 16 gets
rid of the MARK at 0.
>>> dis(pickle.dumps(T, 0))
0: ( MARK
1: ( MARK
2: l LIST (MARK at 1)
3: p PUT 0
6: ( MARK
7: g GET 0
10: t TUPLE (MARK at 6)
11: p PUT 1
14: a APPEND
15: 0 POP
16: 0 POP (MARK at 0)
17: g GET 1
20: . STOP
highest protocol among opcodes = 0
>>> dis(pickle.dumps(T, 1))
0: ( MARK
1: ] EMPTY_LIST
2: q BINPUT 0
4: ( MARK
5: h BINGET 0
7: t TUPLE (MARK at 4)
8: q BINPUT 1
10: a APPEND
11: 1 POP_MARK (MARK at 0)
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 1
Try protocol 2.
>>> dis(pickle.dumps(L, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: . STOP
highest protocol among opcodes = 2
>>> dis(pickle.dumps(T, 2))
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: h BINGET 0
7: \x85 TUPLE1
8: q BINPUT 1
10: a APPEND
11: 0 POP
12: h BINGET 1
14: . STOP
highest protocol among opcodes = 2
Try protocol 3 with annotations:
>>> dis(pickle.dumps(T, 3), annotate=1)
0: \x80 PROTO 3 Protocol version indicator.
2: ] EMPTY_LIST Push an empty list.
3: q BINPUT 0 Store the stack top into the memo. The stack is not popped.
5: h BINGET 0 Read an object from the memo and push it on the stack.
7: \x85 TUPLE1 Build a one-tuple out of the topmost item on the stack.
8: q BINPUT 1 Store the stack top into the memo. The stack is not popped.
10: a APPEND Append an object to a list.
11: 0 POP Discard the top stack item, shrinking the stack by one item.
12: h BINGET 1 Read an object from the memo and push it on the stack.
14: . STOP Stop the unpickling machine.
highest protocol among opcodes = 2
a=
>>> import pickle
>>> import io
>>> f = io.BytesIO()
>>> p = pickle.Pickler(f, 2)
>>> x = [1, 2, 3]
>>> p.dump(x)
>>> p.dump(x)
>>> f.seek(0)
0
>>> memo = {}
>>> dis(f, memo=memo)
0: \x80 PROTO 2
2: ] EMPTY_LIST
3: q BINPUT 0
5: ( MARK
6: K BININT1 1
8: K BININT1 2
10: K BININT1 3
12: e APPENDS (MARK at 5)
13: . STOP
highest protocol among opcodes = 2
>>> dis(f, memo=memo)
14: \x80 PROTO 2
16: h BINGET 0
18: . STOP
highest protocol among opcodes = 2
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Return a matrix representing a month's calendar.
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Return the data for the specified year ready for formatting. The return
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c s g | ]}� j �|��qS r )rV )r, r- )r rC r r r. � s z.Calendar.yeardatescalendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )�months�widthr r r. � s r )r< �JanuaryrU )r rC r[ r )rZ r r[ rC r �yeardatescalendar� s zCalendar.yeardatescalendarc s> ��fdd�t ttd �D �� � �fdd�t dt� ���D �S )z�
Return the data for the specified year ready for formatting (similar to
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zero.
c s g | ]}� j �|��qS r )rW )r, r- )r rC r r r. � s z.Calendar.yeardays2calendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )rZ r[ r r r. � s r )r< r\ rU )r rC r[ r )rZ r r[ rC r �yeardays2calendar� s zCalendar.yeardays2calendarc s> ��fdd�t ttd �D �� � �fdd�t dt� ���D �S )z�
Return the data for the specified year ready for formatting (similar to
yeardatescalendar()). Entries in the week lists are day numbers.
Day numbers outside this month are zero.
c s g | ]}� j �|��qS r )rX )r, r- )r rC r r r. � s z-Calendar.yeardayscalendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )rZ r[ r r r. s r )r< r\ rU )r rC r[ r )rZ r r[ rC r �yeardayscalendar� s zCalendar.yeardayscalendarN)r )rY )rY )rY )r r! r" �__doc__r rJ r �propertyr rK rN rR rP rV rW rX r] r^ r_ r r r r r � s
c @ sj e Zd ZdZdd� Zdd� Zdd� Zdd � Zd
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c C s t | j||�dd� dS )z3
Print a single week (no newline).
� )�endN)�print�
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Returns a formatted day.
r r0 z%2i)�center)r rD r r[ �sr r r � formatday s zTextCalendar.formatdayc s dj � �fdd�|D ��S )zA
Returns a single week in a string (no newline).
rb c 3 s | ]\}}� j ||��V qd S )N)rj )r, rQ �wd)r r[ r r � <genexpr> s z*TextCalendar.formatweek.<locals>.<genexpr>)�join)r rf r[ r )r r[ r re s zTextCalendar.formatweekc C s( |dkrt }nt}|| d|� j|�S )z4
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rb c 3 s | ]}� j |��V qd S )N)rp )r, r- )r r[ r r rl . s z0TextCalendar.formatweekheader.<locals>.<genexpr>)rm rK )r r[ r )r r[ r �formatweekheader* s z TextCalendar.formatweekheaderTc C s" t | }|rd||f }|j|�S )z0
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r0 )rc N)rd � formatmonth)r rr rs �w�lr r r r 9 s zTextCalendar.prmonthc C s� t d|�}t d|�}| j||d|d d �}|j� }|d| 7 }|| j|�j� 7 }|d| 7 }x4| j||�D ]$}|| j||�j� 7 }|d| 7 }qnW |S )z@
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r$ r# r? �
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r$ r# r? ry r: c 3 s | ]}�j �|� d �V qdS )FN)ru )r, �k)�colwidthr rr r r rl ` s z*TextCalendar.formatyear.<locals>.<genexpr>c 3 s | ]
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zTextCalendar.formatyearc C s t | j|||||�� dS )zPrint a year's calendar.N)rd r� )r rr rw rx r� r� r r r �pryeart s zTextCalendar.pryearN)T)r r )r r )r$ r# r} rY )r r r} rY )r r! r" r` rg rj re rp rq ru r rv r� r� r r r r r s
%c @ sj e Zd ZdZdddddddgZd d
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r z <td class="noday"> </td>z<td class="%s">%d</td>N)�
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Return a complete week as a table row.
r0 c 3 s | ]\}}� j ||�V qd S )N)rj )r, rQ rk )r r r rl � s z*HTMLCalendar.formatweek.<locals>.<genexpr>z <tr>%s</tr>)rm )r rf ri r )r r re � s zHTMLCalendar.formatweekc C s d| j | t| f S )z:
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z<th class="%s">%s</th>)r� r )r rD r r r rp � s zHTMLCalendar.formatweekdayc s$ dj � fdd�� j� D ��}d| S )z<
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r0 c 3 s | ]}� j |�V qd S )N)rp )r, r- )r r r rl � s z0HTMLCalendar.formatweekheader.<locals>.<genexpr>z <tr>%s</tr>)rm rK )r ri r )r r rq � s z HTMLCalendar.formatweekheaderTc C s* |rdt | |f }n dt | }d| S )z5
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z%s %sz%sz.<tr><th colspan="7" class="month">%s</th></tr>)r )r rr rs rt ri r r r ru � s z HTMLCalendar.formatmonthnamec C s� g }|j }|d� |d� || j|||d�� |d� || j� � |d� x*| j||�D ]}|| j|�� |d� qXW |d� |d� dj|�S )z6
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z@<table border="0" cellpadding="0" cellspacing="0" class="month">ry )rt z</table>r0 )r� ru rq rW re rm )r rr rs rt r� r� r| r r r rv � s zHTMLCalendar.formatmonthrY c C s� g }|j }t|d�}|d� |d� |d||f � xntttd |�D ]Z}t|t|| d��}|d� x0|D ](}|d� || j||d d
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r# z?<table border="0" cellpadding="0" cellspacing="0" class="year">ry z.<tr><th colspan="%d" class="year">%s</th></tr>r/ r: z<tr>z<td>F)rt z</td>z</tr>z</table>r0 )r� rz r< r\ r� rv rm )r rr r[ r� r� r- rZ r� r r r r� � s
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Nz$<?xml version="1.0" encoding="%s"?>
zn<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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r0 �xmlcharrefreplace)�sys�getdefaultencodingr� r� rm �encode)r rr r[ �css�encodingr� r� r r r �formatyearpage� s$ zHTMLCalendar.formatyearpage)T)T)rY )rY r� N)
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This class can be passed a locale name in the constructor and will return
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as unicode.
r Nc C s& t j| |� |d kr tj� }|| _d S )N)r r r� �getdefaultlocaler� )r r r� r r r r � s zLocaleTextCalendar.__init__c
C sB t | j��. |dkrt}nt}|| }|d |� j|�S Q R X d S )Nrn )r� r� r r rh )r rD r[ ro �namer r r rp s z LocaleTextCalendar.formatweekdayTc
C s8 t | j��$ t| }|r$d||f }|j|�S Q R X d S )Nz%s %r)r� r� r rh )r rr rs r[ rt ri r r r ru s
z"LocaleTextCalendar.formatmonthname)r N)T)r r! r" r` r rp ru r r r r r � s
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This class can be passed a locale name in the constructor and will return
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as unicode.
r Nc C s& t j| |� |d kr tj� }|| _d S )N)r r r� r� r� )r r r� r r r r s zLocaleHTMLCalendar.__init__c
C s0 t | j�� t| }d| j| |f S Q R X d S )Nz<th class="%s">%s</th>)r� r� r r� )r rD ri r r r rp ! s z LocaleHTMLCalendar.formatweekdayTc
C s6 t | j��" t| }|r$d||f }d| S Q R X d S )Nz%s %sz.<tr><th colspan="7" class="month">%s</th></tr>)r� r� r )r rr rs rt ri r r r ru & s
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c C s* t | kotkn s t| ��| t_d S )N)�MONDAY�SUNDAYr r� r )r r r r r 3 s rY r} c C s t t| ||�� dS )z1Prints multi-column formatting for year calendarsN)rd r� )�colsr �spacingr r r r3 G s r3 c s |d9 }|j � fdd�| D ��S )zEReturns a string formatted from n strings, centered within n columns.rb c 3 s | ]}|j � �V qd S )N)rh )r, r� )r r r rl O s z formatstring.<locals>.<genexpr>)rm )r� r r� r )r r r� L s r� i� c C s^ | dd� \}}}}}}t j||d�j� t | d }|d | }|d | } | d | }
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| � d S )4Nr ztext only argumentszhtml only argumentsz-wz--widthr$ z width of date column (default 2))�type�default�helpz-lz--linesr# z)number of lines for each week (default 1)z-sz --spacingr} z"spacing between months (default 6)z-mz--monthsrY zmonths per row (default 3)z-cz--cssz calendar.csszCSS to use for page)r� r� z-Lz--localez.locale to be used from month and weekday namesz-ez
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fractions.cpython-36.opt-1.pyc 0000644 00000043774 15033571514 0012144 0 ustar 00 3
\W\ � @ s� d Z ddlmZ ddlZddlZddlZddlZddlZddgZdd� Z dd� Z
ej j Z
ej jZejd ejejB �ZG d
d� dej�ZdS ) z+Fraction, infinite-precision, real numbers.� )�DecimalN�Fraction�gcdc C sf ddl }|jdtd� t| �t ko0t|�kn r\|p<| dk rPtj| |� S tj| |�S t| |�S )z�Calculate the Greatest Common Divisor of a and b.
Unless b==0, the result will have the same sign as b (so that when
b is divided by it, the result comes out positive).
r Nz6fractions.gcd() is deprecated. Use math.gcd() instead.� )�warnings�warn�DeprecationWarning�type�int�mathr �_gcd)�a�br � r �!/usr/lib64/python3.6/fractions.pyr s c C s x|r|| | } }qW | S )Nr )r
r r r r r s r aC
\A\s* # optional whitespace at the start, then
(?P<sign>[-+]?) # an optional sign, then
(?=\d|\.\d) # lookahead for digit or .digit
(?P<num>\d*) # numerator (possibly empty)
(?: # followed by
(?:/(?P<denom>\d+))? # an optional denominator
| # or
(?:\.(?P<decimal>\d*))? # an optional fractional part
(?:E(?P<exp>[-+]?\d+))? # and optional exponent
)
\s*\Z # and optional whitespace to finish
c s� e Zd ZdZdSZdTdd�� fdd � Zed
d � �Zed d
� �ZdUdd�Z e
dd� �Z e
dd� �Z dd� Z
dd� Zdd� Zdd � Zeeej�\ZZd d � Zeeej�\ZZd d � Zeeej�\ZZ d!d"� Z ee ej �\Z Z d#d$� Z!d%d&� Z"d'd(� Z#d)d*� Z$d+d,� Z%d-d.� Z&d/d0� Z'd1d2� Z(d3d4� Z)d5d6� Z*d7d8� Z+d9d:� Z,dVd;d<�Z-d=d>� Z.d?d@� Z/dAdB� Z0dCdD� Z1dEdF� Z2dGdH� Z3dIdJ� Z4dKdL� Z5dMdN� Z6dOdP� Z7dQdR� Z8� Z9S )Wr a] This class implements rational numbers.
In the two-argument form of the constructor, Fraction(8, 6) will
produce a rational number equivalent to 4/3. Both arguments must
be Rational. The numerator defaults to 0 and the denominator
defaults to 1 so that Fraction(3) == 3 and Fraction() == 0.
Fractions can also be constructed from:
- numeric strings similar to those accepted by the
float constructor (for example, '-2.3' or '1e10')
- strings of the form '123/456'
- float and Decimal instances
- other Rational instances (including integers)
�
_numerator� _denominatorr NT)�
_normalizec sR t t| �j| �}|dk�rdt|�tkr6||_d|_|S t|tj �rV|j
|_|j |_|S t|t t
f�rx|j� \|_|_|S t|t��rZtj|�}|dkr�td| ��t|jd�p�d�}|jd�}|r�t|�}nvd}|jd�}|�rdt|� }|| t|� }||9 }|jd �} | �rBt| �} | d
k�r4|d| 9 }n|d| 9 }|jd �d k�rb| }ntd
��nft|�t k�o�t|�kn �r�n@t|tj ��r�t|tj ��r�|j
|j |j
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t||�}
||
}||
}||_||_|S )a� Constructs a Rational.
Takes a string like '3/2' or '1.5', another Rational instance, a
numerator/denominator pair, or a float.
Examples
--------
>>> Fraction(10, -8)
Fraction(-5, 4)
>>> Fraction(Fraction(1, 7), 5)
Fraction(1, 35)
>>> Fraction(Fraction(1, 7), Fraction(2, 3))
Fraction(3, 14)
>>> Fraction('314')
Fraction(314, 1)
>>> Fraction('-35/4')
Fraction(-35, 4)
>>> Fraction('3.1415') # conversion from numeric string
Fraction(6283, 2000)
>>> Fraction('-47e-2') # string may include a decimal exponent
Fraction(-47, 100)
>>> Fraction(1.47) # direct construction from float (exact conversion)
Fraction(6620291452234629, 4503599627370496)
>>> Fraction(2.25)
Fraction(9, 4)
>>> Fraction(Decimal('1.47'))
Fraction(147, 100)
N� z Invalid literal for Fraction: %rZnum�0�denom�decimal�
�expr Zsign�-z2argument should be a string or a Rational instancez+both arguments should be Rational instanceszFraction(%s, 0))�superr �__new__r r
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isinstance�numbers�Rational� numerator� denominator�floatr �as_integer_ratio�str�_RATIONAL_FORMAT�match�
ValueError�group�len� TypeError�ZeroDivisionErrorr r r ) �clsr r! r �self�mr r Zscaler �g)� __class__r r r T sr
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zFraction.__new__c C sD t |tj�r| |�S t |t�s8td| j|t|�jf ��| |j� � S )z�Converts a finite float to a rational number, exactly.
Beware that Fraction.from_float(0.3) != Fraction(3, 10).
z.%s.from_float() only takes floats, not %r (%s))r r �Integralr" r* �__name__r r# )r, �fr r r �
from_float� s
zFraction.from_floatc C sV ddl m} t|tj�r&|t|��}n$t||�sJtd| j|t|�jf ��| |j � � S )zAConverts a finite Decimal instance to a rational number, exactly.r )r z2%s.from_decimal() only takes Decimals, not %r (%s))
r r r r r1 r
r* r2 r r# )r, Zdecr r r r � from_decimal� s
zFraction.from_decimal�@B c
C s� |dk rt d��| j|kr"t| �S d\}}}}| j| j }}xP|| }||| } | |kr\P ||||| | f\}}}}|||| }}q>W || | }
t||
| ||
| �} t||�} t| | �t| | �kr�| S | S dS )aW Closest Fraction to self with denominator at most max_denominator.
>>> Fraction('3.141592653589793').limit_denominator(10)
Fraction(22, 7)
>>> Fraction('3.141592653589793').limit_denominator(100)
Fraction(311, 99)
>>> Fraction(4321, 8765).limit_denominator(10000)
Fraction(4321, 8765)
r z$max_denominator should be at least 1r N)r r r r )r' r r r �abs)
r- Zmax_denominatorZp0Zq0Zp1Zq1�n�dr
Zq2�kZbound1Zbound2r r r �limit_denominator� s&
zFraction.limit_denominatorc C s | j S )N)r )r
r r r r s zFraction.numeratorc C s | j S )N)r )r
r r r r! s zFraction.denominatorc C s d| j j| j| jf S )z
repr(self)z
%s(%s, %s))r0 r2 r r )r- r r r �__repr__ s zFraction.__repr__c C s( | j dkrt| j�S d| j| j f S dS )z str(self)r z%s/%sN)r r$ r )r- r r r �__str__ s
zFraction.__str__c sT � �fdd�}d� j d |_ �j|_� �fdd�}d� j d |_ �j|_||fS )a� Generates forward and reverse operators given a purely-rational
operator and a function from the operator module.
Use this like:
__op__, __rop__ = _operator_fallbacks(just_rational_op, operator.op)
In general, we want to implement the arithmetic operations so
that mixed-mode operations either call an implementation whose
author knew about the types of both arguments, or convert both
to the nearest built in type and do the operation there. In
Fraction, that means that we define __add__ and __radd__ as:
def __add__(self, other):
# Both types have numerators/denominator attributes,
# so do the operation directly
if isinstance(other, (int, Fraction)):
return Fraction(self.numerator * other.denominator +
other.numerator * self.denominator,
self.denominator * other.denominator)
# float and complex don't have those operations, but we
# know about those types, so special case them.
elif isinstance(other, float):
return float(self) + other
elif isinstance(other, complex):
return complex(self) + other
# Let the other type take over.
return NotImplemented
def __radd__(self, other):
# radd handles more types than add because there's
# nothing left to fall back to.
if isinstance(other, numbers.Rational):
return Fraction(self.numerator * other.denominator +
other.numerator * self.denominator,
self.denominator * other.denominator)
elif isinstance(other, Real):
return float(other) + float(self)
elif isinstance(other, Complex):
return complex(other) + complex(self)
return NotImplemented
There are 5 different cases for a mixed-type addition on
Fraction. I'll refer to all of the above code that doesn't
refer to Fraction, float, or complex as "boilerplate". 'r'
will be an instance of Fraction, which is a subtype of
Rational (r : Fraction <: Rational), and b : B <:
Complex. The first three involve 'r + b':
1. If B <: Fraction, int, float, or complex, we handle
that specially, and all is well.
2. If Fraction falls back to the boilerplate code, and it
were to return a value from __add__, we'd miss the
possibility that B defines a more intelligent __radd__,
so the boilerplate should return NotImplemented from
__add__. In particular, we don't handle Rational
here, even though we could get an exact answer, in case
the other type wants to do something special.
3. If B <: Fraction, Python tries B.__radd__ before
Fraction.__add__. This is ok, because it was
implemented with knowledge of Fraction, so it can
handle those instances before delegating to Real or
Complex.
The next two situations describe 'b + r'. We assume that b
didn't know about Fraction in its implementation, and that it
uses similar boilerplate code:
4. If B <: Rational, then __radd_ converts both to the
builtin rational type (hey look, that's us) and
proceeds.
5. Otherwise, __radd__ tries to find the nearest common
base ABC, and fall back to its builtin type. Since this
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r� c @ s$ e Zd ZdZf Zdd� Zdd� ZdS )� _NoReturna Special type indicating functions that never return.
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as for generic function definitions. See class Generic for more
information on generic types. Generic functions work as follows:
def repeat(x: T, n: int) -> List[T]:
'''Return a list containing n references to x.'''
return [x]*n
def longest(x: A, y: A) -> A:
'''Return the longest of two strings.'''
return x if len(x) >= len(y) else y
The latter example's signature is essentially the overloading
of (str, str) -> str and (bytes, bytes) -> bytes. Also note
that if the arguments are instances of some subclass of str,
the return type is still plain str.
At runtime, isinstance(x, T) and issubclass(C, T) will raise TypeError.
Type variables defined with covariant=True or contravariant=True
can be used do declare covariant or contravariant generic types.
See PEP 484 for more details. By default generic types are invariant
in all type variables.
Type variables can be introspected. e.g.:
T.__name__ == 'T'
T.__constraints__ == ()
T.__covariant__ == False
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A.__constraints__ == (str, bytes)
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c @ s e Zd ZdZf Zdd� ZdS )r a@ Tuple type; Tuple[X, Y] is the cross-product type of X and Y.
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c O s$ | j tkrtd��tt| f|�|�S )Nz6Type Tuple cannot be instantiated; use tuple() instead)r� r rP r rn )rV r\ r] rC rC rD rU s
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zCallableMeta.__getitem__c s^ |\}}d� t |� �}|tkr.t� jt|f�S d� t� fdd�|D ��}||f }t� j|�S )Nz.Callable[args, result]: result must be a type.z6Callable[[arg, ...], result]: each arg must be a type.c 3 s | ]}t |� �V qd S )N)r} )r� r{ )r� rC rD r� F s z1CallableMeta.__getitem_inner__.<locals>.<genexpr>)r} r rT r� r� rn )r[ r� r\ r )rZ )r� rD r > s
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r c @ s e Zd ZdZf Zdd� ZdS )r a� Callable type; Callable[[int], str] is a function of (int) -> str.
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� Z S )r� a3 Special type construct to mark class variables.
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class Starship:
stats: ClassVar[Dict[str, int]] = {} # class variable
damage: int = 10 # instance variable
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|| _ d S )N)r )r[ �tpr] rC rC rD r^ r s z_ClassVar.__init__c C sP t | �}| jd kr4|t|dj|jdd � ��dd�S tdj|jdd � ���d S )Nz {} accepts only single type.rK T)rO z {} cannot be further subscripted)ro r r} �formatrA rP )r[ �itemrV rC rC rD r� u s
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|||�}|| k�r�| | dk�r�t| }|||< �q<W |S )a� Return type hints for an object.
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are returned as a dictionary. For classes, annotations include also
inherited members.
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present.
BEWARE -- the behavior of globalns and localns is counterintuitive
(unless you are familiar with how eval() and exec() work). The
search order is locals first, then globals.
- If no dict arguments are passed, an attempt is made to use the
globals from obj (or the respective module's globals for classes),
and these are also used as the locals. If the object does not appear
to have globals, an empty dictionary is used.
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locals.
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r� Y nX | S )aI Decorator to indicate that annotations are not type hints.
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z2no_type_check_decorator.<locals>.wrapped_decorator)r� r� )r- r. rC )r- rD r: ( s c O s t d��dS )z*Helper for @overload to raise when called.z�You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.N)�NotImplementedError)r\ r] rC rC rD �_overload_dummy8 s r0 c C s t S )a
Decorator for overloaded functions/methods.
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@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
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follow it with an implementation. The implementation should *not*
be decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
def utf8(value):
# implementation goes here
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s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r s �
Collectionc @ s e Zd Zf ZdS )rI N)rA rd r@ rq rC rC rC rD rI s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ' s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r + s c @ s e Zd Zf ZdS )r! N)rA rd r@ rq rC rC rC rD r! 0 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r 6 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r : s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ? s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" E s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" I s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" M s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r R s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r V s c @ s e Zd Zf Zdd� ZdS )r0 c O s$ | j tkrtd��tt| f|�|�S )Nz4Type List cannot be instantiated; use list() instead)r� r0 rP r r )rV r\ r] rC rC rD rU ^ s
z List.__new__N)rA rd r@ rq rU rC rC rC rD r0 Z s c @ s e Zd Zf Zdd� ZdS )r- c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r- � collections�dequer )rV r\ r] rC rC rD rU i s
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z Set.__new__N)rA rd r@ rq rU rC rC rC rD r1 o s c @ s e Zd Zf Zdd� ZdS )r2 c O s$ | j tkrtd��tt| f|�|�S )Nz>Type FrozenSet cannot be instantiated; use frozenset() instead)r� r2 rP r r� )rV r\ r] rC rC rD rU } s
zFrozenSet.__new__N)rA rd r@ rq rU rC rC rC rD r2 z s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r$ N)rA rd r@ rq rC rC rC rD r$ � s �AbstractContextManagerc @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s2 e Zd Zf Zdd� Zejdd� �Zedd� �Z dS )r c C s | S )NrC )r[ rC rC rD � __enter__� s zContextManager.__enter__c C s d S )NrC )r[ �exc_type� exc_value� tracebackrC rC rD �__exit__� s zContextManager.__exit__c C s8 | t kr4tdd� |jD ��r4tdd� |jD ��r4dS tS )Nc s s | ]}d |j kV qdS )rM N)r )r� �BrC rC rD r� � s z2ContextManager.__subclasshook__.<locals>.<genexpr>c s s | ]}d |j kV qdS )rQ N)r )r� rR rC rC rD r� � s T)r r� r� r~ )rV �CrC rC rD r� � s
z ContextManager.__subclasshook__N)
rA rd r@ rq rM r� r rQ � classmethodr� rC rC rC rD r � s �AbstractAsyncContextManagerc @ s e Zd Zf ZdS )�AsyncContextManagerN)rA rd r@ rq rC rC rC rD rV � s rV � a�
class AsyncContextManager(Generic[T_co]):
__slots__ = ()
async def __aenter__(self):
return self
@abc.abstractmethod
async def __aexit__(self, exc_type, exc_value, traceback):
return None
@classmethod
def __subclasshook__(cls, C):
if cls is AsyncContextManager:
if sys.version_info[:2] >= (3, 6):
return _collections_abc._check_methods(C, "__aenter__", "__aexit__")
if (any("__aenter__" in B.__dict__ for B in C.__mro__) and
any("__aexit__" in B.__dict__ for B in C.__mro__)):
return True
return NotImplemented
__all__.append('AsyncContextManager')
c @ s e Zd Zf Zdd� ZdS )r. c O s$ | j tkrtd��tt| f|�|�S )Nz4Type Dict cannot be instantiated; use dict() instead)r� r. rP r r� )rV r\ r] rC rC rD rU � s
z Dict.__new__N)rA rd r@ rq rU rC rC rC rD r. � s c @ s e Zd Zf Zdd� ZdS )r/ c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r/ rJ � defaultdictr )rV r\ r] rC rC rD rU � s
zDefaultDict.__new__N)rA rd r@ rq rU rC rC rC rD r/ � s c @ s e Zd Zf Zdd� ZdS )r, c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r, rJ r )rV r\ r] rC rC rD rU � s
zCounter.__new__N)rA rd r@ rq rU rC rC rC rD r, � s �ChainMapc @ s e Zd Zf Zdd� ZdS )rY c O s* | j tkrtj||�S ttj| f|�|�S )N)r� rY rJ r )rV r\ r] rC rC rD rU � s
zChainMap.__new__N)rA rd r@ rq rU rC rC rC rD rY � s c @ s e Zd Zf Zdd� ZdS )r4 c O s$ | j tkrtd��tt| f|�|�S )Nz@Type Generator cannot be instantiated; create a subclass instead)r� r4 rP r �_G_base)rV r\ r] rC rC rD rU s
zGenerator.__new__N)rA rd r@ rq rU rC rC rC rD r4 s �AsyncGeneratorc @ s e Zd Zf ZdS )r[ N)rA rd r@ rq rC rC rC rD r[ s �CT_co)r� r� c @ s e Zd ZdZf ZdS )r a� A special construct usable to annotate class objects.
For example, suppose we have the following classes::
class User: ... # Abstract base for User classes
class BasicUser(User): ...
class ProUser(User): ...
class TeamUser(User): ...
And a function that takes a class argument that's a subclass of
User and returns an instance of the corresponding class::
U = TypeVar('U', bound=User)
def new_user(user_class: Type[U]) -> U:
user = user_class()
# (Here we could write the user object to a database)
return user
joe = new_user(BasicUser)
At this point the type checker knows that joe has type BasicUser.
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b'\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9'
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Library usage: see the Timer class.
Command line usage:
python timeit.py [-n N] [-r N] [-s S] [-t] [-c] [-p] [-h] [--] [statement]
Options:
-n/--number N: how many times to execute 'statement' (default: see below)
-r/--repeat N: how many times to repeat the timer (default 3)
-s/--setup S: statement to be executed once initially (default 'pass').
Execution time of this setup statement is NOT timed.
-p/--process: use time.process_time() (default is time.perf_counter())
-t/--time: use time.time() (deprecated)
-c/--clock: use time.clock() (deprecated)
-v/--verbose: print raw timing results; repeat for more digits precision
-u/--unit: set the output time unit (usec, msec, or sec)
-h/--help: print this usage message and exit
--: separate options from statement, use when statement starts with -
statement: statement to be timed (default 'pass')
A multi-line statement may be given by specifying each line as a
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argument in quotes and using leading spaces. Multiple -s options are
treated similarly.
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successive powers of 10 until the total time is at least 0.2 seconds.
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pass statement. It differs between versions. The code here doesn't try
to hide it, but you should be aware of it. The baseline overhead can be
measured by invoking the program without arguments.
Classes:
Timer
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timeit(string, string) -> float
repeat(string, string) -> list
default_timer() -> float
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By Greg Ward <gward@python.net>
Originally distributed as Optik.
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(http://lists.sourceforge.net/lists/listinfo/optik-users).
Simple usage example:
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="write report to FILE", metavar="FILE")
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(options, args) = parser.parse_args()
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Copyright (c) 2001-2006 Gregory P. Ward. All rights reserved.
Copyright (c) 2002-2006 Python Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
� Nc C s d| j jt| �| f S )Nz<%s at 0x%x: %s>)� __class__�__name__�id)�self� r � /usr/lib64/python3.6/optparse.py�_reprO s r )�gettext�ngettextc C s | S )Nr )�messager r r r \ s r c C s |dkr | S |S )N� r )ZsingularZplural�nr r r r _ s r c @ s e Zd Zdd� Zdd� ZdS )r c C s
|| _ d S )N)�msg)r r r r r �__init__h s zOptParseError.__init__c C s | j S )N)r )r r r r �__str__k s zOptParseError.__str__N)r �
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Raised if an Option instance is created with invalid or
inconsistent arguments.
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Raised if conflicting options are added to an OptionParser.
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Raised if an invalid option value is encountered on the command
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Raised if an invalid option is seen on the command line.
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Raised if an ambiguous option is seen on the command line.
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Abstract base class for formatting option help. OptionParser
instances should use one of the HelpFormatter subclasses for
formatting help; by default IndentedHelpFormatter is used.
Instance attributes:
parser : OptionParser
the controlling OptionParser instance
indent_increment : int
the number of columns to indent per nesting level
max_help_position : int
the maximum starting column for option help text
help_position : int
the calculated starting column for option help text;
initially the same as the maximum
width : int
total number of columns for output (pass None to constructor for
this value to be taken from the $COLUMNS environment variable)
level : int
current indentation level
current_indent : int
current indentation level (in columns)
help_width : int
number of columns available for option help text (calculated)
default_tag : str
text to replace with each option's default value, "%default"
by default. Set to false value to disable default value expansion.
option_strings : { Option : str }
maps Option instances to the snippet of help text explaining
the syntax of that option, e.g. "-h, --help" or
"-fFILE, --file=FILE"
_short_opt_fmt : str
format string controlling how short options with values are
printed in help text. Must be either "%s%s" ("-fFILE") or
"%s %s" ("-f FILE"), because those are the two syntaxes that
Optik supports.
_long_opt_fmt : str
similar but for long options; must be either "%s %s" ("--file FILE")
or "%s=%s" ("--file=FILE").
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z"HelpFormatter.store_option_stringsc st |j � rF|jp|jj� � � �fdd�|jD �}� �fdd�|jD �}n |j}|j}�jrb|| }n|| }dj|�S )z@Return a comma-separated list of option strings & metavariables.c s g | ]}�j |� f �qS r )rB )rc Zsopt)�metavarr r r re a s z7HelpFormatter.format_option_strings.<locals>.<listcomp>c s g | ]}�j |� f �qS r )rC )rc Zlopt)rs r r r re c s z, )� takes_valuers r^ �upper� _short_opts�
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z#HelpFormatter.format_option_stringsN)r r" r# r' r` r rD rH rJ rK rL rO rQ rU rX rZ rb rl rr rn r r r r r � s" )
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Usage: %s
)r) )r rN r r r rO | s z"IndentedHelpFormatter.format_usagec C s d| j d|f S )Nz%*s%s:
rE )r< )r rP r r r rQ s z$IndentedHelpFormatter.format_heading)r. rx Nr )r r" r# r' r rO rQ r r r r r
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r rx Nc C s t j| ||||� d S )N)r r )r r1 r; r7 r? r r r r � s z TitledHelpFormatter.__init__c C s d| j td��|f S )Nz%s %s
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z=-)r= rg )r rP r r r rQ � s z"TitledHelpFormatter.format_heading)r rx Nr )r r" r# r' r rO rQ r r r r r � s
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check_builtin� s r� c C s: || j kr|S djtt| j ��}ttd�|||f ��d S )Nz, z.option %s: invalid choice: %r (choose from %s))�choicesr, �map�reprr r) )r& rp r� r� r r r r � s
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Instance attributes:
_short_opts : [string]
_long_opts : [string]
action : string
type : string
dest : string
default : any
nargs : int
const : any
choices : [string]
callback : function
callback_args : (any*)
callback_kwargs : { string : any }
help : string
metavar : string
�actionr r^ �default�nargs�constr� �callback�
callback_args�callback_kwargsr[ rs �store� store_const�
store_true� store_falserh � append_const�count�version�stringr2 r� r� r� �choice)r2 r� r� r� r� Nc O sF g | _ g | _| j|�}| j|� | j|� x| jD ] }|| � q2W d S )N)rv rw �_check_opt_strings�_set_opt_strings�
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zOption.__init__c C s dd� |D �}|st d��|S )Nc S s g | ] }|r|�qS r r )rc rp r r r re K s z-Option._check_opt_strings.<locals>.<listcomp>z+at least one option string must be supplied)� TypeError)r rk r r r r� G s zOption._check_opt_stringsc C s� x�|D ]�}t |�dk r&td| | ��qt |�dkrf|d dkoH|d dksXtd| | ��| jj|� q|dd� dko�|d dks�td| | ��| jj|� qW d S ) Nr. z>invalid option string %r: must be at least two characters longr �-r zMinvalid short option string %r: must be of the form -x, (x any non-dash char)z--zGinvalid long option string %r: must start with --, followed by non-dash)rg r
rv rh rw )r rk rp r r r r� P s$
zOption._set_opt_stringsc C sz xP| j D ]F}||kr,t| ||| � ||= q|dkrBt| |t� qt| |d � qW |rvt|j� �}tddj|� | ��d S )Nr� z invalid keyword arguments: %sz, )�ATTRS�setattrr_ �sorted�keysr
r, )r r� �attrr r r r� e s zOption._set_attrsc C s2 | j d krd| _ n | j | jkr.td| j | ��d S )Nr� zinvalid action: %r)r� �ACTIONSr
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_check_actionx s
zOption._check_actionc C s� | j d kr0| j| jkr�| jd k r(d| _ q�d| _ n^t| j t �rF| j j| _ | j dkrVd| _ | j | jkrrtd| j | ��| j| jkr�td| j | ��d S )Nr� r� r$ zinvalid option type: %rz$must not supply a type for action %r) r r� �ALWAYS_TYPED_ACTIONSr� �
isinstancer �TYPESr
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TYPED_ACTIONS)r r r r � _check_type~ s
zOption._check_typec C sr | j dkrT| jd kr td| ��qnt| jttf�sntdtt | j��jd�d | ��n| jd k rntd| j | ��d S )Nr� z/must supply a list of choices for type 'choice'z1choices must be a list of strings ('%s' supplied)�'r z#must not supply choices for type %r)r r� r
r� �tuple�listr$ �split)r r r r �
_check_choice� s
zOption._check_choicec C s\ | j | jkp| jd k }| jd krX|rX| jrH| jd dd � jdd�| _n| jd d | _d S )Nr r. r� r) r )r� �
STORE_ACTIONSr r^ rw ra rv )r rt r r r � _check_dest� s
zOption._check_destc C s* | j | jkr&| jd k r&td| j | ��d S )Nz*'const' must not be supplied for action %r)r� �
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)r r r r � _check_const� s zOption._check_constc C s< | j | jkr | jd kr8d| _n| jd k r8td| j | ��d S )Nr z*'nargs' must not be supplied for action %r)r� r� r� r
)r r r r � _check_nargs� s
zOption._check_nargsc C s� | j dkrvt| j�s$td| j | ��| jd k rLt| jt� rLtd| j | ��| jd k r�t| jt� r�td| j | ��nB| jd k r�td| j | ��| jd k r�td| ��| jd k r�td| ��d S )Nr� zcallback not callable: %rz3callback_args, if supplied, must be a tuple: not %rz4callback_kwargs, if supplied, must be a dict: not %rz.callback supplied (%r) for non-callback optionz.callback_args supplied for non-callback optionz0callback_kwargs supplied for non-callback option) r� �callabler� r
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zOption._check_callbackc C s dj | j| j �S )N�/)r, rv rw )r r r r r! � s zOption.__str__c C s
| j d k S )N)r )r r r r rt � s zOption.takes_valuec C s | j r| j d S | jd S d S )Nr )rw rv )r r r r �get_opt_string� s
zOption.get_opt_stringc C s* | j j| j�}|d kr|S || ||�S d S )N)� TYPE_CHECKERr] r )r rp r� r� r r r � check_value� s zOption.check_valuec s: |d k r6�j dkr �j� |�S t� �fdd�|D ��S d S )Nr c s g | ]}�j � |��qS r )r� )rc �v)rp r r r re s z(Option.convert_value.<locals>.<listcomp>)r� r� r� )r rp r� r )rp r r �
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zOption.convert_valuec C s$ | j ||�}| j| j| j||||�S )N)r� � take_actionr� r^ )r rp r� �valuesr0 r r r �process s zOption.processc C s: |dkrt |||� �n |dkr2t ||| j� �n|dkrHt ||d� n�|dkr^t ||d� n�|dkrz|j|g �j|� n�|dkr�|j|g �j| j� n�|d kr�t |||j|d
�d � n||d kr�| jp�f }| jp�i }| j| |||f|�|� nF|d
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d| j ��d S )Nr� r� r� Tr� Frh r� r� r r r� r[ r� zunknown action %r) r� r� � ensure_valuerh r� r� r� �
print_help�exit�
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r� r� r� r� rh r� r� r� r[ r� )r� r� r� r� rh r� r� )r� rh r� )r� rh )r� r� )r� r2 r� r� r� r� )#r r" r# r' r� r� r� r� r� r� r� r� r r� r� r r� r� r� r� r� r� r� r� r� r� r! r �__repr__rt r� r� r� r� r� r r r r r � s�
ZSUPPRESSZHELPZUSAGEc @ s^ e Zd Zddd�Zdd� ZeZdd� Zdd � Zd
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dS )r Nc C s* |r&x |j � D ]\}}t| ||� qW d S )N)�itemsr� )r r\ r� r~ r r r r 9 s zValues.__init__c C s
t | j�S )N)r$ �__dict__)r r r r r! > s zValues.__str__c C s2 t |t�r| j|jkS t |t�r*| j|kS tS d S )N)r� r r� r� �NotImplemented)r �otherr r r �__eq__C s
z
Values.__eq__c C s: x4t | �D ](}||kr
|| }|dk r
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Update the option values from an arbitrary dictionary, but only
use keys from dict that already have a corresponding attribute
in self. Any keys in dict without a corresponding attribute
are silently ignored.
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zValues._update_carefulc C s | j j|� dS )z�
Update the option values from an arbitrary dictionary,
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they have a corresponding attribute in self or not.
N)r� �update)r r� r r r �
_update_looseX s zValues._update_loosec C s8 |dkr| j |� n |dkr(| j|� n td| ��d S )N�carefulZloosezinvalid update mode: %r)r� r� r6 )r r� �moder r r �_update` s
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Abstract base class.
Class attributes:
standard_option_list : [Option]
list of standard options that will be accepted by all instances
of this parser class (intended to be overridden by subclasses).
Instance attributes:
option_list : [Option]
the list of Option objects contained by this OptionContainer
_short_opt : { string : Option }
dictionary mapping short option strings, eg. "-f" or "-X",
to the Option instances that implement them. If an Option
has multiple short option strings, it will appear in this
dictionary multiple times. [1]
_long_opt : { string : Option }
dictionary mapping long option strings, eg. "--file" or
"--exclude", to the Option instances that implement them.
Again, a given Option can occur multiple times in this
dictionary. [1]
defaults : { string : any }
dictionary mapping option destination names to default
values for each destination [1]
[1] These mappings are common to (shared by) all components of the
controlling OptionParser, where they are initially created.
c C s& | j � || _| j|� | j|� d S )N)�_create_option_list� option_class�set_conflict_handler�set_description)r r� �conflict_handlerrW r r r r � s
zOptionContainer.__init__c C s i | _ i | _i | _d S )N)�
_short_opt� _long_optr\ )r r r r �_create_option_mappings� s z'OptionContainer._create_option_mappingsc C s |j | _ |j| _|j| _d S )N)r� r� r\ )r r0 r r r �_share_option_mappings� s z&OptionContainer._share_option_mappingsc C s |dkrt d| ��|| _d S )N�error�resolvez$invalid conflict_resolution value %r)r� r� )r6 r� )r �handlerr r r r� � s z$OptionContainer.set_conflict_handlerc C s
|| _ d S )N)rW )r rW r r r r� � s z OptionContainer.set_descriptionc C s | j S )N)rW )r r r r �get_description� s z OptionContainer.get_descriptionc C s | ` | `| `dS )zsee OptionParser.destroy().N)r� r� r\ )r r r r �destroy� s zOptionContainer.destroyc C s� g }x,|j D ]"}|| jkr |j|| j| f� q W x,|jD ]"}|| jkr:|j|| j| f� q:W |r�| j}|dkr�tddjdd� |D �� |��nh|dkr�x^|D ]V\}}|jd�r�|jj |� | j|= n|j j |� | j|= |j p�|js�|j
j j |� q�W d S )Nr� z conflicting option string(s): %sz, c S s g | ] }|d �qS )r r )rc �cor r r re � s z3OptionContainer._check_conflict.<locals>.<listcomp>r� z--) rv r� rh rw r� r� r r, �
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Class attributes:
standard_option_list : [Option]
list of standard options that will be accepted by all instances
of this parser class (intended to be overridden by subclasses).
Instance attributes:
usage : string
a usage string for your program. Before it is displayed
to the user, "%prog" will be expanded to the name of
your program (self.prog or os.path.basename(sys.argv[0])).
prog : string
the name of the current program (to override
os.path.basename(sys.argv[0])).
description : string
A paragraph of text giving a brief overview of your program.
optparse reformats this paragraph to fit the current terminal
width and prints it when the user requests help (after usage,
but before the list of options).
epilog : string
paragraph of help text to print after option help
option_groups : [OptionGroup]
list of option groups in this parser (option groups are
irrelevant for parsing the command-line, but very useful
for generating help)
allow_interspersed_args : bool = true
if true, positional arguments may be interspersed with options.
Assuming -a and -b each take a single argument, the command-line
-ablah foo bar -bboo baz
will be interpreted the same as
-ablah -bboo -- foo bar baz
If this flag were false, that command line would be interpreted as
-ablah -- foo bar -bboo baz
-- ie. we stop processing options as soon as we see the first
non-option argument. (This is the tradition followed by
Python's getopt module, Perl's Getopt::Std, and other argument-
parsing libraries, but it is generally annoying to users.)
process_default_values : bool = true
if true, option default values are processed similarly to option
values from the command line: that is, they are passed to the
type-checking function for the option's type (as long as the
default value is a string). (This really only matters if you
have defined custom types; see SF bug #955889.) Set it to false
to restore the behaviour of Optik 1.4.1 and earlier.
rargs : [string]
the argument list currently being parsed. Only set when
parse_args() is active, and continually trimmed down as
we consume arguments. Mainly there for the benefit of
callback options.
largs : [string]
the list of leftover arguments that we have skipped while
parsing options. If allow_interspersed_args is false, this
list is always empty.
values : Values
the set of option values currently being accumulated. Only
set when parse_args() is active. Also mainly for callbacks.
Because of the 'rargs', 'largs', and 'values' attributes,
OptionParser is not thread-safe. If, for some perverse reason, you
need to parse command-line arguments simultaneously in different
threads, use different OptionParser instances.
Nr� Tc C sr t j| |||� | j|� | | _|| _d| _d| _|d kr@t� }|| _| jj | � |
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zOptionParser.__init__c C s2 t j| � x| jD ] }|j� qW | `| `| `dS )a
Declare that you are done with this OptionParser. This cleans up
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it) can be garbage-collected promptly. After calling destroy(), the
OptionParser is unusable.
N)r r� ro rm r )r rq r r r r� � s
zOptionParser.destroyc C s g | _ g | _| j� d S )N)rm ro r� )r r r r r� � s z OptionParser._create_option_listc C s | j dddtd�d� d S )Nz-hz--helpr[ z show this help message and exit)r� r[ )r� r) )r r r r �_add_help_option� s z OptionParser._add_help_optionc C s | j ddtd�d� d S )Nz --versionr� z&show program's version number and exit)r� r[ )r� r) )r r r r �_add_version_option� s z OptionParser._add_version_optionc C s> | j r| j| j � |r | j|� | jr.| j� |r:| j� d S )N)�standard_option_listr� r� r r
)r rm r r r r r � s
z"OptionParser._populate_option_listc C s d | _ d | _d | _d S )N)�rargs�largsr� )r r r r r � s z OptionParser._init_parsing_statec C sL |d krt d�| _n4|tkr$d | _n$|j� jd�rB|dd � | _n|| _d S )Nz%prog [options]zusage: � )r) rN r r} r� )r rN r r r r � s zOptionParser.set_usagec C s
d| _ dS )a Set parsing to not stop on the first non-option, allowing
interspersing switches with command arguments. This is the
default behavior. See also disable_interspersed_args() and the
class documentation description of the attribute
allow_interspersed_args.TN)r )r r r r �enable_interspersed_args� s z%OptionParser.enable_interspersed_argsc C s
d| _ dS )z�Set parsing to stop on the first non-option. Use this if
you have a command processor which runs another command that
has options of its own and you want to make sure these options
don't get confused.
FN)r )r r r r �disable_interspersed_args s z&OptionParser.disable_interspersed_argsc C s
|| _ d S )N)r
)r r� r r r �set_process_default_values s z'OptionParser.set_process_default_valuesc C s || j |< d S )N)r\ )r r^ r� r r r � set_default s zOptionParser.set_defaultc K s | j j|� d S )N)r\ r� )r r� r r r � set_defaults s zOptionParser.set_defaultsc C s. | j d d � }x| jD ]}|j|j � qW |S )N)rm ro ri )r Zoptionsrq r r r �_get_all_options s z OptionParser._get_all_optionsc C sd | j st| j�S | jj� }x@| j� D ]4}|j|j�}t|t�r$|j � }|j
||�||j< q$W t|�S )N) r
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z OptionParser.get_default_valuesc O s| t |d t�r t| f|�|�}nLt|�dkrd| rd|d }t |t�sPtd| ��|j| k rltd��ntd��| jj|� |S )Nr r z not an OptionGroup instance: %rz"invalid OptionGroup (wrong parser)zinvalid arguments) r� r$ r rg r� r0 r6 ro rh )r r� r� rq r r r �add_option_group+ s
z OptionParser.add_option_groupc C s0 | j j|�p| jj|�}|r,|j| k r,|jS d S )N)r� r] r� r� )r r( r& r r r �get_option_group; s
z OptionParser.get_option_groupc C s& |d krt jdd � S |d d � S d S )Nr )r� �argv)r r� r r r � _get_argsE s zOptionParser._get_argsc C s� | j |�}|dkr| j� }|| _g | _}|| _y| j|||�}W n4 ttfk
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parse_args(args : [string] = sys.argv[1:],
values : Values = None)
-> (values : Values, args : [string])
Parse the command-line options found in 'args' (default:
sys.argv[1:]). Any errors result in a call to 'error()', which
by default prints the usage message to stderr and calls
sys.exit() with an error message. On success returns a pair
(values, args) where 'values' is a Values instance (with all
your option values) and 'args' is the list of arguments left
over after parsing options.
N) r r r r r� �
_process_argsr r r� r$ � check_values)r r� r� r r �stop�errr r r �
parse_argsK s
zOptionParser.parse_argsc C s ||fS )a�
check_values(values : Values, args : [string])
-> (values : Values, args : [string])
Check that the supplied option values and leftover arguments are
valid. Returns the option values and leftover arguments
(possibly adjusted, possibly completely new -- whatever you
like). Default implementation just returns the passed-in
values; subclasses may override as desired.
r )r r� r� r r r r r s zOptionParser.check_valuesc C s� x�|r�|d }|dkr |d= dS |dd� dkr>| j ||� q|dd� dkrht|�dkrh| j||� q| jr�|j|� |d= qdS qW dS )a� _process_args(largs : [string],
rargs : [string],
values : Values)
Process command-line arguments and populate 'values', consuming
options and arguments from 'rargs'. If 'allow_interspersed_args' is
false, stop at the first non-option argument. If true, accumulate any
interspersed non-option arguments in 'largs'.
r z--Nr. r r� )�_process_long_optrg �_process_short_optsr rh )r r r r� �argr r r r s
zOptionParser._process_argsc C s t || j�S )a _match_long_opt(opt : string) -> string
Determine which long option string 'opt' matches, ie. which one
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)�
_match_abbrevr� )r rp r r r �_match_long_opt� s z OptionParser._match_long_optc
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|d|� �} |d|�= n |r�| jt d �| � nd } |j || || � d S )
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N)� print_usager� r2 r� r/ )r r r r r r� s zOptionParser.errorc C s" | j r| jj| j| j ��S dS d S )NrE )rN r rO r1 )r r r r � get_usage# s zOptionParser.get_usagec C s | j rt| j� |d� dS )aa print_usage(file : file = stdout)
Print the usage message for the current program (self.usage) to
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Print the version message for this program (self.version) to
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ztimedelta.__divmod__c C s t |t�r| j|�dkS dS d S )Nr F)r[ rN r )r� r� r r r �__eq__Z s
ztimedelta.__eq__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ rN r rw )r� r� r r r �__le__` s
ztimedelta.__le__c C s& t |t�r| j|�dk S t| |� d S )Nr )r[ rN r rw )r� r� r r r �__lt__f s
ztimedelta.__lt__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ rN r rw )r� r� r r r �__ge__l s
ztimedelta.__ge__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ rN r rw )r� r� r r r �__gt__r s
ztimedelta.__gt__c C s t |t�st�t| j� |j� �S )N)r[ rN r r � _getstate)r� r� r r r r x s ztimedelta._cmpc C s | j dkrt| j� �| _ | j S )Nr r )r� �hashr� )r� r r r �__hash__| s
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ztimedelta.__bool__c C s | j | j| jfS )N)r} r~ r )r� r r r r� � s ztimedelta._getstatec C s | j | j� fS )N)r� r� )r� r r r �
__reduce__� s ztimedelta.__reduce__N)r} r~ r r� )r r r r r r r )%rg r� r� �__doc__� __slots__r� r� r� r� �propertyrM r5 r7 r� �__radd__r� r� r� r� r� r� �__rmul__r� r� r� r� r� r� r� r� r� r� r r� r� r� r� r r r r rN Q sD
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rN i�ɚ;rm rn i?B )rM r3 r4 r5 r7 )r7 c @ s( e Zd ZdZdCZdDdd�Zed d
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d� �Z dd� Z
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dd� ZeZedd� �Zedd � �Zed d � �Zd d � Zd!d"� ZdEd#d$�Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Z d1d2� Z d3d4� Z e Z d5d6� Z d7d8� Z!d9d:� Z"d;d<� Z#d=d>� Z$d?d@� Z%dAdB� Z&dS )F�datea� Concrete date type.
Constructors:
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fromtimestamp()
today()
fromordinal()
Operators:
__repr__, __str__
__eq__, __le__, __lt__, __ge__, __gt__, __hash__
__add__, __radd__, __sub__ (add/radd only with timedelta arg)
Methods:
timetuple()
toordinal()
weekday()
isoweekday(), isocalendar(), isoformat()
ctime()
strftime()
Properties (readonly):
year, month, day
�_year�_month�_dayr� Nc C s� |dkr�t |ttf�r�t|�dkr�dt|dd� � ko@dkn r�t |t�r|y|jd�}W n tk
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Nr r r r r �latin1znFailed to encode latin1 string when unpickling a date object. pickle.load(data, encoding='latin1') is assumed.r r )r[ �bytesr\ rJ �ord�encode�UnicodeEncodeErrorr9 rR r� �_date__setstater� rl r� r� r� )r� r r r r� r r r r� � s( $
z date.__new__c C s( t j|�\ }}}}}}}} }
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fromtimestamp� s zdate.fromtimestampc C s t j� }| j|�S )z"Construct a date from time.time().)r+ �timer� )r� r� r r r �today� s z
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)r( )r� r' r r, r- r r r � fromordinal� s zdate.fromordinalc C s d| j j| j j| j| j| jf S )a5 Convert to formal string, for repr().
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'datetime.datetime(2010, 1, 1, 0, 0)'
>>> dt = datetime(2010, 1, 1, tzinfo=timezone.utc)
>>> repr(dt)
'datetime.datetime(2010, 1, 1, 0, 0, tzinfo=datetime.timezone.utc)'
z%s.%s(%d, %d, %d))r� r� r� r� r� r� )r� r r r r� � s
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date.strftimec C s: t |t�s tdt|�j ��t|�dkr2| j|�S t| �S )Nzmust be str, not %sr )r[ r\ r] r^ rg rJ rQ )r� r= r r r �
__format__
s
zdate.__format__c C s d| j | j| jf S )z�Return the date formatted according to ISO.
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References:
- http://www.w3.org/TR/NOTE-datetime
- http://www.cl.cam.ac.uk/~mgk25/iso-time.html
z%04d-%02d-%02d)r� r� r� )r� r r r � isoformat s zdate.isoformatc C s | j S )z
year (1-9999))r� )r� r r r r " s z date.yearc C s | j S )z month (1-12))r� )r� r r r r ' s z
date.monthc C s | j S )z
day (1-31))r� )r� r r r r , s zdate.dayc C s t | j| j| jdddd�S )z9Return local time tuple compatible with time.localtime().r r r )r1 r� r� r� )r� r r r rS 4 s zdate.timetuplec C s t | j| j| j�S )z�Return proleptic Gregorian ordinal for the year, month and day.
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)r r� r� r� )r� r r r r� 9 s zdate.toordinalc C s: |dkr| j }|dkr | j}|dkr*| j}t| �|||�S )z;Return a new date with new values for the specified fields.N)r� r� r� r^ )r� r r r r r r rO A s z date.replacec C s t |t�r| j|�dkS tS )Nr )r[ r� r r� )r� r� r r r r� M s
z date.__eq__c C s t |t�r| j|�dkS tS )Nr )r[ r� r r� )r� r� r r r r� R s
z date.__le__c C s t |t�r| j|�dk S tS )Nr )r[ r� r r� )r� r� r r r r� W s
z date.__lt__c C s t |t�r| j|�dkS tS )Nr )r[ r� r r� )r� r� r r r r� \ s
z date.__ge__c C s t |t�r| j|�dkS tS )Nr )r[ r� r r� )r� r� r r r r� a s
z date.__gt__c C sP t |t�st�| j| j| j }}}|j|j|j }}}t|||f|||f�S )N)r[ r� r r� r� r� r )r� r� r r, r- Zy2�m2Zd2r r r r f s z date._cmpc C s | j dkrt| j� �| _ | j S )zHash.r r )r� r� r� )r� r r r r� l s
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date.__hash__c C sF t |t�rB| j� |j }d| k o*tkn r:tj|�S td��tS )zAdd a date to a timedelta.r zresult out of range) r[ rN r� rM � _MAXORDINALr� r� r� r� )r� r� �or r r r� t s
z date.__add__c C sD t |t�r| t|j � S t |t�r@| j� }|j� }t|| �S tS )z.Subtract two dates, or a date and a timedelta.)r[ rN rM r� r� r� )r� r� �days1�days2r r r r� s
z date.__sub__c C s | j � d d S )z:Return day of the week, where Monday == 0 ... Sunday == 6.r) r* )r� )r� r r r r� � s z date.weekdayc C s | j � d pdS )z:Return day of the week, where Monday == 1 ... Sunday == 7.r* )r� )r� r r r �
isoweekday� s zdate.isoweekdayc C s� | j }t|�}t| j | j| j�}t|| d�\}}|dk r^|d8 }t|�}t|| d�\}}n$|dkr�|t|d �kr�|d7 }d}||d |d fS )a� Return a 3-tuple containing ISO year, week number, and weekday.
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containing the year's first Thursday; everything else derives
from that.
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ISO calendar algorithm taken from
http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
(used with permission)
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r� r )rM c @ s< e Zd ZdZf Zdd� Zdd� Zdd� Zdd � Zd
d � Z d S )
rt z}Abstract base class for time zone info classes.
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tzinfo.tznamec C s t d��dS )z:datetime -> minutes east of UTC (negative for west of UTC)z)tzinfo subclass must override utcoffset()N)r� )r� r� r r r rD � s ztzinfo.utcoffsetc C s t d��dS )z�datetime -> DST offset in minutes east of UTC.
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tzinfo.dstc C s� t |t�std��|j| k r$td��|j� }|dkr<td��|j� }|dkrTtd��|| }|r�||7 }|j� }|dkr�td��|| S )z*datetime in UTC -> datetime in local time.z&fromutc() requires a datetime argumentzdt.tzinfo is not selfNz0fromutc() requires a non-None utcoffset() resultz*fromutc() requires a non-None dst() resultz;fromutc(): dt.dst gave inconsistent results; cannot convert)r[ �datetimer] rt r9 rD ra )r� r� ZdtoffZdtdst�deltar r r �fromutc� s"
ztzinfo.fromutcc C sf t | dd �}|r|� }nf }t | dd �}|r4|� }nt | dd �pBd }|d krV| j|fS | j||fS d S )N�__getinitargs__� __getstate__�__dict__)rK r� )r� Z getinitargs�args�getstate�stater r r r� � s
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Constructors:
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Methods:
strftime()
isoformat()
utcoffset()
tzname()
dst()
Properties (readonly):
hour, minute, second, microsecond, tzinfo, fold
�_hour�_minute�_second� _microsecond�_tzinfor� �_foldr N)rr c C s� t |ttf�r�t|�dkr�t|dd� �d@ dk r�t |t�rhy|jd�}W n tk
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fold (keyword only, default to zero)
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second (0-59))r� )r� r r r rq U s z time.secondc C s | j S )zmicrosecond (0-999999))r� )r� r r r rA Z s ztime.microsecondc C s | j S )ztimezone info object)r� )r� r r r rt _ s z time.tzinfoc C s | j S )N)r� )r� r r r rr d s z time.foldc C s$ t |t�r | j|dd�dkS dS d S )NT)� allow_mixedr F)r[ r� r )r� r� r r r r� l s
z time.__eq__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ r� r rw )r� r� r r r r� r s
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z time.__lt__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ r� r rw )r� r� r r r r� ~ s
z time.__ge__c C s& t |t�r| j|�dkS t| |� d S )Nr )r[ r� r rw )r� r� r r r r� � s
z time.__gt__Fc
C s� t |t�st�| j}|j}d }}||kr0d}n| j� }|j� }||k}|rvt| j| j| j| j f|j|j|j|j f�S |d ks�|d kr�|r�dS t
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z time._cmpc C s� | j d kr�| jr | jdd�}n| }|j� }|sBt|j� d �| _ n�tt| j| j d�| tdd��\}}|tdd� s~t
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}|S )z%Convert to formal string, for repr().r z, %d, %dz, %drC z%s.%s(%d, %d%s)Nr �)z , tzinfo=%rz , fold=1)r r r r )
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time.__repr__r2 c C s0 t | j| j| j| j|�}| j� }|r,||7 }|S )a' Return the time formatted according to ISO.
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part is omitted if self.microsecond == 0.
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terms of the time to include.
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ztime.isoformatc C s( ddd| j | j| jdddf }t| ||�S )z{Format using strftime(). The date part of the timestamp passed
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ztime.__format__c C s( | j dkrdS | j jd�}td|� |S )zQReturn the timezone offset in minutes east of UTC (negative west of
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ztime.utcoffsetc C s& | j dkrdS | j jd�}t|� |S )a Return the timezone name.
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N)r� rH r` )r� r_ r r r rH s
z time.tznamec C s( | j dkrdS | j jd�}td|� |S )af Return 0 if DST is not in effect, or the DST offset (in minutes
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info.
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ztime.dstTc C sl |dkr| j }|dkr | j}|dkr*| j}|dkr8| j}|dkrF| j}|dkrT| j}t| �||||||d�S )z;Return a new time with new values for the specified fields.NT)rr )ro rp rq rA rt r� r^ )r� ro rp rq rA rt rr r r r rO , s z time.replacer c C sp t | jd�\}}t |d�\}}| j}| jr:|dkr:|d7 }t|| j| j|||g�}| jd krb|fS || jfS d S )Nr� r � )r# r� r� r� r� r� r� r� )r� �protocol�us2�us3�us1rX � basestater r r r� ? s
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t | j�S )N)r� r' )r� r r r r� � s ztimezone.__hash__c C sL | | j krdS | jdkr0d| jj| jj| jf S d| jj| jj| j| jf S )a Convert to formal string, for repr().
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>>> repr(tz)
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(c) Copyright CNRI, All Rights Reserved. NO WARRANTY.
� N)�*z%Failed to load the builtin codecs: %s�register�lookup�open� EncodedFile�BOM�BOM_BE�BOM_LE�BOM32_BE�BOM32_LE�BOM64_BE�BOM64_LE�BOM_UTF8� BOM_UTF16� BOM_UTF16_LE� BOM_UTF16_BE� BOM_UTF32� BOM_UTF32_LE� BOM_UTF32_BE� CodecInfo�Codec�IncrementalEncoder�IncrementalDecoder� StreamReader� StreamWriter�StreamReaderWriter�
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r a9 Defines the interface for stateless encoders/decoders.
The .encode()/.decode() methods may use different error
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'ignore' - ignore the character and continue with the next
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�strictc C s t �dS )a# Encodes the object input and returns a tuple (output
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Create an IncrementalDecoder instance.
The IncrementalDecoder may use different error handling schemes by
providing the errors keyword argument. See the module docstring
for a list of possible values.
N)rF )r9 rF r: r: r; rI s zIncrementalDecoder.__init__Fc C s t �dS )z@
Decode input and returns the resulting object.
N)rD )r9 rE rJ r: r: r; r$
s zIncrementalDecoder.decodec C s dS )z9
Reset the decoder to the initial state.
Nr: )r9 r: r: r; rK s zIncrementalDecoder.resetc C s dS )a
Return the current state of the decoder.
This must be a (buffered_input, additional_state_info) tuple.
buffered_input must be a bytes object containing bytes that
were passed to decode() that have not yet been converted.
additional_state_info must be a non-negative integer
representing the state of the decoder WITHOUT yet having
processed the contents of buffered_input. In the initial state
and after reset(), getstate() must return (b"", 0).
� r )rT r r: )r9 r: r: r; rL s zIncrementalDecoder.getstatec C s dS )z�
Set the current state of the decoder.
state must have been returned by getstate(). The effect of
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Nr: )r9 rM r: r: r; rN & s zIncrementalDecoder.setstateN)rC )F) rA r= r> rB rI r$ rK rL rN r: r: r: r; r � s
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This subclass of IncrementalDecoder can be used as the baseclass for an
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byte sequences.
rC c C s t j| |� d| _d S )NrT )r rI rH )r9 rF r: r: r; rI 4 s z#BufferedIncrementalDecoder.__init__c C s t �d S )N)rD )r9 rE rF rJ r: r: r; �_buffer_decode9 s z)BufferedIncrementalDecoder._buffer_decodeFc C s0 | j | }| j|| j|�\}}||d � | _ |S )N)rH rV rF )r9 rE rJ rQ rR rS r: r: r; r$ > s
z!BufferedIncrementalDecoder.decodec C s t j| � d| _d S )NrT )r rK rH )r9 r: r: r; rK F s
z BufferedIncrementalDecoder.resetc C s
| j dfS )Nr )rH )r9 r: r: r; rL J s z#BufferedIncrementalDecoder.getstatec C s |d | _ d S )Nr )rH )r9 rM r: r: r; rN N s z#BufferedIncrementalDecoder.setstateN)rC )F)
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dd� Z dS )r rC c C s || _ || _dS )aw Creates a StreamWriter instance.
stream must be a file-like object open for writing.
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schemes by providing the errors keyword argument. These
parameters are predefined:
'strict' - raise a ValueError (or a subclass)
'ignore' - ignore the character and continue with the next
'replace'- replace with a suitable replacement character
'xmlcharrefreplace' - Replace with the appropriate XML
character reference.
'backslashreplace' - Replace with backslashed escape
sequences.
'namereplace' - Replace with \N{...} escape sequences.
The set of allowed parameter values can be extended via
register_error.
N)�streamrF )r9 rW rF r: r: r; rI [ s zStreamWriter.__init__c C s" | j || j�\}}| jj|� dS )z> Writes the object's contents encoded to self.stream.
N)r# rF rW �write)r9 �objectrQ rS r: r: r; rX t s zStreamWriter.writec C s | j dj|�� dS )z[ Writes the concatenated list of strings to the stream
using .write().
rG N)rX �join)r9 �listr: r: r; �
writelines{ s zStreamWriter.writelinesc C s dS )a5 Flushes and resets the codec buffers used for keeping state.
Calling this method should ensure that the data on the
output is put into a clean state, that allows appending
of new fresh data without having to rescan the whole
stream to recover state.
Nr: )r9 r: r: r; rK � s
zStreamWriter.resetr c C s* | j j||� |dkr&|dkr&| j� d S )Nr )rW �seekrK )r9 �offset�whencer: r: r; r] � s zStreamWriter.seekc C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 �getattrr: r: r; � __getattr__� s zStreamWriter.__getattr__c C s | S )Nr: )r9 r: r: r; � __enter__� s zStreamWriter.__enter__c C s | j j� d S )N)rW �close)r9 �type�value�tbr: r: r; �__exit__� s zStreamWriter.__exit__N)rC )r ) rA r= r> rI rX r\ rK r] r` ra rb rg r: r: r: r; r Y s
c @ s� e Zd ZeZd dd�Zd dd�Zd#dd �Zd$d d
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S )'r rC c C s. || _ || _d| _| j� | _| j| _d| _dS )a� Creates a StreamReader instance.
stream must be a file-like object open for reading.
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schemes by providing the errors keyword argument. These
parameters are predefined:
'strict' - raise a ValueError (or a subclass)
'ignore' - ignore the character and continue with the next
'replace'- replace with a suitable replacement character
'backslashreplace' - Replace with backslashed escape sequences;
The set of allowed parameter values can be extended via
register_error.
rT N)rW rF �
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zStreamReader.__init__c C s t �d S )N)rD )r9 rE rF r: r: r; r$ � s zStreamReader.decode� Fc C sL | j r | jj| j �| _d| _ |dk r(|}x�|dkrBt| j�|krBP |dk rV| jj� }n | jj|�}| j| }|srP y| j|| j �\}}W n` t
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r� } zD|r�| j|d|j � | j �\}}|j dd�} t| �dkr n� W Y dd}~X nX ||d� | _| j|7 _|s*P q*W |dk �r*| j}
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| j|d� | _|
S )a� Decodes data from the stream self.stream and returns the
resulting object.
chars indicates the number of decoded code points or bytes to
return. read() will never return more data than requested,
but it might return less, if there is not enough available.
size indicates the approximate maximum number of decoded
bytes or code points to read for decoding. The decoder
can modify this setting as appropriate. The default value
-1 indicates to read and decode as much as possible. size
is intended to prevent having to decode huge files in one
step.
If firstline is true, and a UnicodeDecodeError happens
after the first line terminator in the input only the first line
will be returned, the rest of the input will be kept until the
next call to read().
The method should use a greedy read strategy, meaning that
it should read as much data as is allowed within the
definition of the encoding and the given size, e.g. if
optional encoding endings or state markers are available
on the stream, these should be read too.
Nr T)�keependsrm )
rl rj rZ rk �lenrW �readrh r$ rF �UnicodeDecodeError�start�
splitlines) r9 �size�chars� firstline�newdatarQ �newchars� decodedbytes�exc�linesrR r: r: r; rp � sD
zStreamReader.readNTc C s� | j rP| j d }| j d= t| j �dkr8| j d | _d| _ |sL|jdd�d }|S |pVd}| j}�xr| j|dd�}|r�t|t�r�|jd �s�t|t �r�|jd
�r�|| jddd �7 }||7 }|jdd�}|�r�t|�dk�r:|d }|d= t|�dk�r|d | j7 < || _ d| _n|d | j | _|�s8|jdd�d }P |d }|d jdd�d }||k�r�| jj
|dd� �| j | _|�r�|}n|}P | �s�|dk �r�|�r�| �r�|jdd�d }P |d k rb|d
9 }qbW |S )z� Read one line from the input stream and return the
decoded data.
size, if given, is passed as size argument to the
read() method.
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)rt ru i@ � ���) rl ro rk rs rj rp �
isinstance�str�endswith�bytesrZ ) r9 rt rn �line�readsizerQ r{ � line0withend�line0withoutendr: r: r; �readline s^
zStreamReader.readlinec C s | j � }|j|�S )aS Read all lines available on the input stream
and return them as a list.
Line breaks are implemented using the codec's decoder
method and are included in the list entries.
sizehint, if given, is ignored since there is no efficient
way to finding the true end-of-line.
)rp rs )r9 �sizehintrn rQ r: r: r; � readlines] s zStreamReader.readlinesc C s d| _ | j| _d| _dS )z� Resets the codec buffers used for keeping state.
Note that no stream repositioning should take place.
This method is primarily intended to be able to recover
from decoding errors.
rT N)rh rj rk rl )r9 r: r: r; rK l s zStreamReader.resetr c C s | j j||� | j� dS )zp Set the input stream's current position.
Resets the codec buffers used for keeping state.
N)rW r] rK )r9 r^ r_ r: r: r; r] y s zStreamReader.seekc C s | j � }|r|S t�dS )z4 Return the next decoded line from the input stream.N)r� �
StopIteration)r9 r� r: r: r; �__next__� s zStreamReader.__next__c C s | S )Nr: )r9 r: r: r; �__iter__� s zStreamReader.__iter__c C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra � s zStreamReader.__getattr__c C s | S )Nr: )r9 r: r: r; rb � s zStreamReader.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg � s zStreamReader.__exit__)rC )rC r� r� )r� r� F)NT)NT)r )rA r= r> r� ri rI r$ rp r� r� rK r] r� r� r` ra rb rg r: r: r: r; r � s
P
K
c @ s� e Zd ZdZdZd!dd�Zd#dd�Zd$d
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�Zdd� Z dd� Z
dd� Z dd� Z dd� Z
d&dd�Zefdd �Zd d � Zd d � Zd S )'r a StreamReaderWriter instances allow wrapping streams which
work in both read and write modes.
The design is such that one can use the factory functions
returned by the codec.lookup() function to construct the
instance.
�unknownrC c C s( || _ |||�| _|||�| _|| _dS )aR Creates a StreamReaderWriter instance.
stream must be a Stream-like object.
Reader, Writer must be factory functions or classes
providing the StreamReader, StreamWriter interface resp.
Error handling is done in the same way as defined for the
StreamWriter/Readers.
N)rW �reader�writerrF )r9 rW �Reader�WriterrF r: r: r; rI � s
zStreamReaderWriter.__init__rm c C s | j j|�S )N)r� rp )r9 rt r: r: r; rp � s zStreamReaderWriter.readNc C s | j j|�S )N)r� r� )r9 rt r: r: r; r� � s zStreamReaderWriter.readlinec C s | j j|�S )N)r� r� )r9 r� r: r: r; r� � s z StreamReaderWriter.readlinesc C s
t | j�S )z4 Return the next decoded line from the input stream.)�nextr� )r9 r: r: r; r� � s zStreamReaderWriter.__next__c C s | S )Nr: )r9 r: r: r; r� � s zStreamReaderWriter.__iter__c C s | j j|�S )N)r� rX )r9 rQ r: r: r; rX � s zStreamReaderWriter.writec C s | j j|�S )N)r� r\ )r9 r[ r: r: r; r\ � s z StreamReaderWriter.writelinesc C s | j j� | jj� d S )N)r� rK r� )r9 r: r: r; rK � s
zStreamReaderWriter.resetr c C s6 | j j||� | jj� |dkr2|dkr2| jj� d S )Nr )rW r] r� rK r� )r9 r^ r_ r: r: r; r] � s
zStreamReaderWriter.seekc C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra � s z StreamReaderWriter.__getattr__c C s | S )Nr: )r9 r: r: r; rb � s z StreamReaderWriter.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg � s zStreamReaderWriter.__exit__)rC r� )r� )N)N)r )rA r= r> rB �encodingrI rp r� r� r� r� rX r\ rK r] r` ra rb rg r: r: r: r; r � s
c @ s� e Zd ZdZdZdZd dd�Zd dd�Zd!d
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�Z dd� Z
dd� Z dd� Z dd� Z
dd� Zefdd�Zdd� Zd d � Zd S )#r aB StreamRecoder instances translate data from one encoding to another.
They use the complete set of APIs returned by the
codecs.lookup() function to implement their task.
Data written to the StreamRecoder is first decoded into an
intermediate format (depending on the "decode" codec) and then
written to the underlying stream using an instance of the provided
Writer class.
In the other direction, data is read from the underlying stream using
a Reader instance and then encoded and returned to the caller.
r� rC c C s4 || _ || _|| _|||�| _|||�| _|| _dS )a� Creates a StreamRecoder instance which implements a two-way
conversion: encode and decode work on the frontend (the
data visible to .read() and .write()) while Reader and Writer
work on the backend (the data in stream).
You can use these objects to do transparent
transcodings from e.g. latin-1 to utf-8 and back.
stream must be a file-like object.
encode and decode must adhere to the Codec interface; Reader and
Writer must be factory functions or classes providing the
StreamReader and StreamWriter interfaces resp.
Error handling is done in the same way as defined for the
StreamWriter/Readers.
N)rW r# r$ r� r� rF )r9 rW r# r$ r� r� rF r: r: r; rI s zStreamRecoder.__init__rm c C s" | j j|�}| j|| j�\}}|S )N)r� rp r# rF )r9 rt rQ � bytesencodedr: r: r; rp " s zStreamRecoder.readNc C s6 |d kr| j j� }n | j j|�}| j|| j�\}}|S )N)r� r� r# rF )r9 rt rQ r� r: r: r; r� ( s
zStreamRecoder.readlinec C s( | j j� }| j|| j�\}}|jdd�S )NT)rn )r� rp r# rF rs )r9 r� rQ r� r: r: r; r� 1 s
zStreamRecoder.readlinesc C s t | j�}| j|| j�\}}|S )z4 Return the next decoded line from the input stream.)r� r� r# rF )r9 rQ r� r: r: r; r� 7 s
zStreamRecoder.__next__c C s | S )Nr: )r9 r: r: r; r� > s zStreamRecoder.__iter__c C s | j || j�\}}| jj|�S )N)r$ rF r� rX )r9 rQ � bytesdecodedr: r: r; rX A s zStreamRecoder.writec C s( dj |�}| j|| j�\}}| jj|�S )NrG )rZ r$ rF r� rX )r9 r[ rQ r� r: r: r; r\ F s
zStreamRecoder.writelinesc C s | j j� | jj� d S )N)r� rK r� )r9 r: r: r; rK L s
zStreamRecoder.resetc C s || j |�S )z? Inherit all other methods from the underlying stream.
)rW )r9 r3 r` r: r: r; ra Q s zStreamRecoder.__getattr__c C s | S )Nr: )r9 r: r: r; rb X s zStreamRecoder.__enter__c C s | j j� d S )N)rW rc )r9 rd re rf r: r: r; rg [ s zStreamRecoder.__exit__)rC r� )r� )N)N)rA r= r> rB �
data_encoding�
file_encodingrI rp r� r� r� r� rX r\ rK r` ra rb rg r: r: r: r; r � s
�rrC rm c C sV |dk rd|kr|d }t j| ||�}|dkr2|S t|�}t||j|j|�}||_|S )a> Open an encoded file using the given mode and return
a wrapped version providing transparent encoding/decoding.
Note: The wrapped version will only accept the object format
defined by the codecs, i.e. Unicode objects for most builtin
codecs. Output is also codec dependent and will usually be
Unicode as well.
Underlying encoded files are always opened in binary mode.
The default file mode is 'r', meaning to open the file in read mode.
encoding specifies the encoding which is to be used for the
file.
errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
buffering has the same meaning as for the builtin open() API.
It defaults to line buffered.
The returned wrapped file object provides an extra attribute
.encoding which allows querying the used encoding. This
attribute is only available if an encoding was specified as
parameter.
N�b)�builtinsr r r r7 r6 r� )�filename�moder� rF � buffering�file�info�srwr: r: r; r ` s c C sF |dkr |}t |�}t |�}t| |j|j|j|j|�}||_||_|S )a� Return a wrapped version of file which provides transparent
encoding translation.
Data written to the wrapped file is decoded according
to the given data_encoding and then encoded to the underlying
file using file_encoding. The intermediate data type
will usually be Unicode but depends on the specified codecs.
Bytes read from the file are decoded using file_encoding and then
passed back to the caller encoded using data_encoding.
If file_encoding is not given, it defaults to data_encoding.
errors may be given to define the error handling. It defaults
to 'strict' which causes ValueErrors to be raised in case an
encoding error occurs.
The returned wrapped file object provides two extra attributes
.data_encoding and .file_encoding which reflect the given
parameters of the same name. The attributes can be used for
introspection by Python programs.
N)r r r# r$ r7 r6 r� r� )r� r� r� rF � data_info� file_info�srr: r: r; r � s c C s
t | �jS )z� Lookup up the codec for the given encoding and return
its encoder function.
Raises a LookupError in case the encoding cannot be found.
)r r# )r� r: r: r; r � s c C s
t | �jS )z� Lookup up the codec for the given encoding and return
its decoder function.
Raises a LookupError in case the encoding cannot be found.
)r r$ )r� r: r: r; r � s c C s t | �j}|dkrt| ��|S )z� Lookup up the codec for the given encoding and return
its IncrementalEncoder class or factory function.
Raises a LookupError in case the encoding cannot be found
or the codecs doesn't provide an incremental encoder.
N)r r4 � LookupError)r� �encoderr: r: r; r � s
c C s t | �j}|dkrt| ��|S )z� Lookup up the codec for the given encoding and return
its IncrementalDecoder class or factory function.
Raises a LookupError in case the encoding cannot be found
or the codecs doesn't provide an incremental decoder.
N)r r5 r� )r� �decoderr: r: r; r � s
c C s
t | �jS )z� Lookup up the codec for the given encoding and return
its StreamReader class or factory function.
Raises a LookupError in case the encoding cannot be found.
)r r7 )r� r: r: r; r! � s c C s
t | �jS )z� Lookup up the codec for the given encoding and return
its StreamWriter class or factory function.
Raises a LookupError in case the encoding cannot be found.
)r r6 )r� r: r: r; r" � s c k sL t |�|f|�}x | D ]}|j|�}|r|V qW |jdd�}|rH|V dS )z�
Encoding iterator.
Encodes the input strings from the iterator using an IncrementalEncoder.
errors and kwargs are passed through to the IncrementalEncoder
constructor.
rG TN)r r# )�iteratorr� rF �kwargsr� rE �outputr: r: r; r% � s
c k sL t |�|f|�}x | D ]}|j|�}|r|V qW |jdd�}|rH|V dS )z�
Decoding iterator.
Decodes the input strings from the iterator using an IncrementalDecoder.
errors and kwargs are passed through to the IncrementalDecoder
constructor.
rT TN)r r$ )r� r� rF r� r� rE r� r: r: r; r& s
c C s dd� | D �S )z� make_identity_dict(rng) -> dict
Return a dictionary where elements of the rng sequence are
mapped to themselves.
c S s i | ]
}||�qS r: r: )�.0�ir: r: r; �
<dictcomp>" s z&make_identity_dict.<locals>.<dictcomp>r: )�rngr: r: r; �make_identity_dict s r� c C s8 i }x.| j � D ]"\}}||kr(|||< qd||< qW |S )a� Creates an encoding map from a decoding map.
If a target mapping in the decoding map occurs multiple
times, then that target is mapped to None (undefined mapping),
causing an exception when encountered by the charmap codec
during translation.
One example where this happens is cp875.py which decodes
multiple character to \u001a.
N)�items)� decoding_map�m�k�vr: r: r; �make_encoding_map$ s
r� �ignore�replace�xmlcharrefreplace�backslashreplace� namereplace�__main__zlatin-1zutf-8)r� NrC rm )NrC )rC )rC )<rB r� �sys�_codecs� ImportErrorZwhy� SystemError�__all__r r r r r r r � byteorderr r r r r
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r r1 r r rY r rO r rU r r r r r r r r r r r! r" r% r& r� r� r. r' r( r) r* r+ r, r� �_falseZ encodingsrA �stdout�stdinr: r: r: r; �<module> s�
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ftplib.cpython-36.opt-1.pyc 0000644 00000067307 15033571514 0011432 0 ustar 00 3
�\dh!� � @ sV d Z ddlZddlZddlmZ dddddd gZd
Zd Zd ZG d
d� de�Z G dd� de �Z
G dd� de �Z G dd� de �Z G dd� de �Z
e eefZdZdZG dd� d�Zy ddlZW n ek
r� dZY n0X ejZG dd� de�Zejd� e eeejfZdadd� Z da dd� Z d d � Z d d � Z d d!� Z!d)d$d%�Z"d&d'� Z#e$d(k�rRe#� dS )*aS An FTP client class and some helper functions.
Based on RFC 959: File Transfer Protocol (FTP), by J. Postel and J. Reynolds
Example:
>>> from ftplib import FTP
>>> ftp = FTP('ftp.python.org') # connect to host, default port
>>> ftp.login() # default, i.e.: user anonymous, passwd anonymous@
'230 Guest login ok, access restrictions apply.'
>>> ftp.retrlines('LIST') # list directory contents
total 9
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
'226 Transfer complete.'
>>> ftp.quit()
'221 Goodbye.'
>>>
A nice test that reveals some of the network dialogue would be:
python ftplib.py -d localhost -l -p -l
� N)�_GLOBAL_DEFAULT_TIMEOUT�FTP� error_reply�
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� Zd]dd�Zdd� Zdd� ZeZdd� Zdd� Zdd� Zdd � Zd d � Z d d � Z d!d"� Z d#d$� Z d%d&� Z d'd(� Z!d)d*� Z"d+d,� Z#d-d.� Z$d/d0� Z%d1d2� Z&d^d3d4�Z'd_d5d6�Z(d`d7d8�Z)dad:d;�Z*dbd<d=�Z+dcd>d?�Z,ddd@dA�Z-dBdC� Z.dDdE� Z/dFdG� Z0dg fdHdI�Z1dJdK� Z2dLdM� Z3dNdO� Z4dPdQ� Z5dRdS� Z6dTdU� Z7dVdW� Z8dXdY� Z9dZd[� Z:dS )er ay An FTP client class.
To create a connection, call the class using these arguments:
host, user, passwd, acct, timeout
The first four arguments are all strings, and have default value ''.
timeout must be numeric and defaults to None if not passed,
meaning that no timeout will be set on any ftp socket(s)
If a timeout is passed, then this is now the default timeout for all ftp
socket operations for this instance.
Then use self.connect() with optional host and port argument.
To download a file, use ftp.retrlines('RETR ' + filename),
or ftp.retrbinary() with slightly different arguments.
To upload a file, use ftp.storlines() or ftp.storbinary(),
which have an open file as argument (see their definitions
below for details).
The download/upload functions first issue appropriate TYPE
and PORT or PASV commands.
r � Nr zlatin-1Fc C s0 || _ || _|r,| j|� |r,| j|||� d S )N)�source_address�timeout�connect�login)�self�host�user�passwd�acctr r r r r �__init__r s
z FTP.__init__c C s | S )Nr )r r r r � __enter__{ s z
FTP.__enter__c G sN | j d k rJz*y | j� W n ttfk
r0 Y nX W d | j d k rH| j� X d S )N)�sock�quit�OSError�EOFError�close)r �argsr r r �__exit__ s
z FTP.__exit__i� c C s� |dkr|| _ |dkr || _|dkr*|| _|dk r8|| _tj| j | jf| j| jd�| _| jj| _| jj d| j
d�| _ | j � | _
| j
S ) aw Connect to host. Arguments are:
- host: hostname to connect to (string, default previous host)
- port: port to connect to (integer, default previous port)
- timeout: the timeout to set against the ftp socket(s)
- source_address: a 2-tuple (host, port) for the socket to bind
to as its source address before connecting.
r r i� N)r �r)�encodingi���)r �portr r �socket�create_connectionr Zfamily�af�makefiler% �file�getresp�welcome)r r r& r r r r r r � s
z FTP.connectc C s | j rtd| j| j�� | jS )z`Get the welcome message from the server.
(this is read and squirreled away by connect())z *welcome*)� debugging�print�sanitizer- )r r r r �
getwelcome� s zFTP.getwelcomec C s
|| _ dS )z�Set the debugging level.
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2: also print raw lines read and sent before stripping CR/LFN)r. )r �levelr r r �set_debuglevel� s zFTP.set_debuglevelc C s
|| _ dS )z�Use passive or active mode for data transfers.
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passiveserver)r �valr r r �set_pasv� s z FTP.set_pasvc C sJ |d d� dkrBt |jd��}|d d� d|d ||d � }t|�S )N� �pass �PASS z
�*> r8 r9 )�len�rstrip�repr)r �s�ir r r r0 � s $z FTP.sanitizec C sR d|ksd|krt d��|t }| jdkr:td| j|�� | jj|j| j�� d S )N�
�
z4an illegal newline character should not be containedr z*put*) �
ValueError�CRLFr. r/ r0 r �sendall�encoder% )r �liner r r �putline� s
z FTP.putlinec C s$ | j rtd| j|�� | j|� d S )Nz*cmd*)r. r/ r0 rG )r rF r r r �putcmd� s z
FTP.putcmdc C s� | j j| jd �}t|�| jkr.td| j ��| jdkrHtd| j|�� |sPt�|dd � t krn|d d� }n |dd � t kr�|d d� }|S ) Nr zgot more than %d bytesz*get*� ���rJ ���rK )
r+ �readline�maxliner; r r. r/ r0 r rC )r rF r r r �getline� s
z FTP.getlinec C sd | j � }|dd� dkr`|d d� }x:| j � }|d| }|d d� |kr&|dd� dkr&P q&W |S )N� � �-rA )rN )r rF �codeZnextliner r r � getmultiline� s zFTP.getmultilinec C sp | j � }| jr td| j|�� |d d� | _|d d� }|d krD|S |dkrTt|��|dkrdt|��t|��d S )
Nz*resp*rO r �1�2�3�4�5> rT rV rU )rS r. r/ r0 Zlastrespr r r )r �resp�cr r r r, � s z FTP.getrespc C s$ | j � }|dd� dkr t|��|S )z%Expect a response beginning with '2'.Nr rU )r, r )r rY r r r �voidresp� s z FTP.voidrespc C sT dt }| jdkr"td| j|�� | jj|t� | j� }|dd� d krPt|��|S )
z�Abort a file transfer. Uses out-of-band data.
This does not follow the procedure from the RFC to send Telnet
IP and Synch; that doesn't seem to work with the servers I've
tried. Instead, just send the ABOR command as OOB data.s ABORr z *put urgent*NrO �426�225�226> r^ r\ r] ) �B_CRLFr. r/ r0 r rD �MSG_OOBrS r )r rF rY r r r �abort s
z FTP.abortc C s | j |� | j� S )z'Send a command and return the response.)rH r, )r �cmdr r r �sendcmd s
z FTP.sendcmdc C s | j |� | j� S )z8Send a command and expect a response beginning with '2'.)rH r[ )r rb r r r �voidcmd s
z FTP.voidcmdc C sB |j d�}t|d �t|d �g}|| }ddj|� }| j|�S )zUSend a PORT command with the current host and the given
port number.
�.� zPORT �,)�splitr= �joinrd )r r r& ZhbytesZpbytes�bytesrb r r r �sendport s
z FTP.sendportc C sb d}| j tjkrd}| j tjkr$d}|dkr4td��dt|�|t|�dg}ddj|� }| j|�S )zESend an EPRT command with the current host and the given port number.r r rI zunsupported address familyr zEPRT �|)r) r' �AF_INETZAF_INET6r r= ri rd )r r r& r) Zfieldsrb r r r �sendeprt$ s z FTP.sendeprtc
C s d}d}x�t jdd| jt jdt j�D ]j}|\}}}}}y t j |||�}|j|� W n8 tk
r� } z | }|rt|j� d}w$W Y dd} ~ X nX P q$W |dkr�|dk r�|�ntd��|jd� |j � d }
| j
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�} | jtk �r|j| j� |S )z3Create a new socket and send a PORT command for it.Nr z!getaddrinfo returns an empty listr )r' Z getaddrinfor) Z SOCK_STREAMZ
AI_PASSIVEZbindr r! ZlistenZ getsocknamer rm rk rn r r �
settimeout)
r �errr �resr) Zsocktype�protoZ canonnameZsa�_r& r rY r r r �makeport1 s6
z FTP.makeportc C s\ | j tjkr:t| jd��\}}| jr*|}qT| jj� d }nt| jd�| jj� �\}}||fS )z<Internal: Does the PASV or EPSV handshake -> (address, port)�PASVr ZEPSV) r) r' rm �parse227rc � trust_server_pasv_ipv4_addressr Z getpeername�parse229)r Zuntrusted_hostr& r r r r �makepasvQ s z FTP.makepasvc
C s6 d}| j r�| j� \}}tj||f| j| jd�}yL|dk rF| jd| � | j|�}|d dkrd| j� }|d dkrxt|��W n |j � � Y nX n�| j
� �r}|dk r�| jd| � | j|�}|d dkr�| j� }|d dkr�t|��|j � \}} | jt k �r
|j
| j� W dQ R X |dd� dk�r.t|�}||fS ) a� Initiate a transfer over the data connection.
If the transfer is active, send a port command and the
transfer command, and accept the connection. If the server is
passive, send a pasv command, connect to it, and start the
transfer command. Either way, return the socket for the
connection and the expected size of the transfer. The
expected size may be None if it could not be determined.
Optional `rest' argument can be a string that is sent as the
argument to a REST command. This is essentially a server
marker used to tell the server to skip over any data up to the
given marker.
N)r zREST %sr rU rT rO �150)r4 ry r' r( r r rc r, r r! rt Zacceptr ro �parse150)
r rb �rest�sizer r& �connrY r Zsockaddrr r r � ntransfercmd] s<
zFTP.ntransfercmdc C s | j ||�d S )z0Like ntransfercmd() but returns only the socket.r )r )r rb r| r r r � transfercmd� s zFTP.transfercmdc C s� |sd}|sd}|sd}|dkr0|d kr0|d }| j d| �}|d dkrX| j d| �}|d dkrr| j d | �}|d d
kr�t|��|S ) zLogin, default anonymous.Z anonymousr rQ z
anonymous@zUSER r rV zPASS zACCT rU > r rQ )rc r )r r r r rY r r r r � s z FTP.login� c
C sb | j d� | j||��>}x |j|�}|s*P ||� qW tdk rPt|t�rP|j� W dQ R X | j� S )a� Retrieve data in binary mode. A new port is created for you.
Args:
cmd: A RETR command.
callback: A single parameter callable to be called on each
block of data read.
blocksize: The maximum number of bytes to read from the
socket at one time. [default: 8192]
rest: Passed to transfercmd(). [default: None]
Returns:
The response code.
zTYPE IN)rd r� Zrecv�
_SSLSocket�
isinstance�unwrapr[ )r rb �callback� blocksizer| r~ �datar r r �
retrbinary� s
zFTP.retrbinaryc C s� |dkr t }| jd�}| j|���}|jd| jd���}x�|j| jd �}t|�| jkrbtd| j ��| j dkrzt
dt |�� |s�P |d
d� t kr�|dd � }n |d d� d kr�|dd
� }||� q6W t
dk r�t|t
�r�|j� W dQ R X W dQ R X | j� S )ah Retrieve data in line mode. A new port is created for you.
Args:
cmd: A RETR, LIST, or NLST command.
callback: An optional single parameter callable that is called
for each line with the trailing CRLF stripped.
[default: print_line()]
Returns:
The response code.
NzTYPE Ar$ )r% r zgot more than %d bytesrI z*retr*rA rJ rJ rK rK )�
print_linerc r� r* r% rL rM r; r r. r/ r= rC r� r� r� r[ )r rb r� rY r~ �fprF r r r � retrlines� s*
z
FTP.retrlinesc
C sp | j d� | j||��L}x*|j|�}|s*P |j|� |r||� qW tdk r^t|t�r^|j� W dQ R X | j� S )a9 Store a file in binary mode. A new port is created for you.
Args:
cmd: A STOR command.
fp: A file-like object with a read(num_bytes) method.
blocksize: The maximum data size to read from fp and send over
the connection at once. [default: 8192]
callback: An optional single parameter callable that is called on
each block of data after it is sent. [default: None]
rest: Passed to transfercmd(). [default: None]
Returns:
The response code.
zTYPE IN)rd r� �readrD r� r� r� r[ )r rb r� r� r� r| r~ �bufr r r �
storbinary� s
zFTP.storbinaryc
C s� | j d� | j|���}x||j| jd �}t|�| jkrDtd| j ��|sJP |dd� tkrz|d tkrr|dd� }|t }|j|� |r||� qW tdk r�t |t�r�|j
� W dQ R X | j � S ) ah Store a file in line mode. A new port is created for you.
Args:
cmd: A STOR command.
fp: A file-like object with a readline() method.
callback: An optional single parameter callable that is called on
each line after it is sent. [default: None]
Returns:
The response code.
zTYPE Ar zgot more than %d bytesrI NrJ rK rK ) rd r� rL rM r; r r_ rD r� r� r� r[ )r rb r� r� r~ r� r r r � storlines s$
z
FTP.storlinesc C s d| }| j |�S )zSend new account name.zACCT )rd )r Zpasswordrb r r r r + s zFTP.acctc G s4 d}x|D ]}|d| }q
W g }| j ||j� |S )zBReturn a list of files in a given directory (default the current).ZNLST� )r� �append)r r" rb �arg�filesr r r �nlst0 s
zFTP.nlstc G sl d}d}|dd� r>t |d �t d�kr>|dd� |d }}x |D ]}|rD|d| }qDW | j||� dS )
a List a directory in long form.
By default list current directory to stdout.
Optional last argument is callback function; all
non-empty arguments before it are concatenated to the
LIST command. (This *should* only be used for a pathname.)ZLISTNr r r� rK rK rK rK )�typer� )r r" rb �funcr� r r r �dir9 s
zFTP.dirc
c s� |r | j ddj|� d � |r*d| }nd}g }| j||j� xh|D ]`}|jt�jd�\}}}i } x6|dd � jd�D ] }
|
jd�\} }} | | | j� < qxW || fV qFW dS )
a< List a directory in a standardized format by using MLSD
command (RFC-3659). If path is omitted the current directory
is assumed. "facts" is a list of strings representing the type
of information desired (e.g. ["type", "size", "perm"]).
Return a generator object yielding a tuple of two elements
for every file found in path.
First element is the file name, the second one is a dictionary
including a variable number of "facts" depending on the server
and whether "facts" argument has been provided.
z
OPTS MLST �;zMLSD %sZMLSDr� Nr �=rK ) rc ri r� r� r< rC � partitionrh �lower)
r �pathZfactsrb �linesrF Z facts_foundrs �name�entryZfact�key�valuer r r �mlsdH s
zFTP.mlsdc C s0 | j d| �}|d dkr"t|��| jd| �S )zRename a file.zRNFR r rV zRNTO )rc r rd )r ZfromnameZtonamerY r r r �renamed s z
FTP.renamec C s. | j d| �}|dd� dkr"|S t|��dS )zDelete a file.zDELE NrO �250�200> r� r� )rc r )r �filenamerY r r r �deletek s z
FTP.deletec C sn |dkrPy
| j d�S tk
rL } z |jd dd� dkr<� W Y dd}~X q\X n |dkr\d}d | }| j |�S )
zChange to a directory.z..ZCDUPr NrO �500r re zCWD )rd r r" )r �dirname�msgrb r r r �cwds s
zFTP.cwdc C s: | j d| �}|dd� dkr6|dd� j� }t|�S dS )z Retrieve the size of a file.zSIZE NrO Z213)rc �strip�int)r r� rY r> r r r r} � s zFTP.sizec C s$ | j d| �}|jd�s dS t|�S )z+Make a directory, return its full pathname.zMKD �257r )rd �
startswith�parse257)r r� rY r r r �mkd� s
zFTP.mkdc C s | j d| �S )zRemove a directory.zRMD )rd )r r� r r r �rmd� s zFTP.rmdc C s | j d�}|jd�sdS t|�S )z!Return current working directory.ZPWDr� r )rd r� r� )r rY r r r �pwd� s
zFTP.pwdc C s | j d�}| j� |S )z Quit, and close the connection.ZQUIT)rd r! )r rY r r r r � s
zFTP.quitc C sD z | j }d| _ |dk r |j� W d| j}d| _|dk r>|j� X dS )z8Close the connection without assuming anything about it.N)r+ r! r )r r+ r r r r r! � s z FTP.close����)r r r� N)N)N)r r r )r� N)N)r� NN)N);r r
r �__doc__r. r �FTP_PORTr& �MAXLINErM r r+ r- r4 r% rw r r r r# r r1 r3 �debugr6 r0 rG rH rN rS r, r[ ra rc rd rk rn rt ry r r� r r� r� r� r� r r� r� r� r� r� r� r} r� r� r� r r! r r r r r J sl
7
#
c @ sn e Zd ZdZejZdddddddedf dd�Zddd�Z d d
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d d � Z d
d� Z dd� Z
ddd�Zdd� ZdS )�FTP_TLSa� A FTP subclass which adds TLS support to FTP as described
in RFC-4217.
Connect as usual to port 21 implicitly securing the FTP control
connection before authenticating.
Securing the data connection requires user to explicitly ask
for it by calling prot_p() method.
Usage example:
>>> from ftplib import FTP_TLS
>>> ftps = FTP_TLS('ftp.python.org')
>>> ftps.login() # login anonymously previously securing control channel
'230 Guest login ok, access restrictions apply.'
>>> ftps.prot_p() # switch to secure data connection
'200 Protection level set to P'
>>> ftps.retrlines('LIST') # list directory content securely
total 9
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
'226 Transfer complete.'
>>> ftps.quit()
'221 Goodbye.'
>>>
r Nc
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rB �warnings�warn�DeprecationWarningr� r� �sslZ_create_stdlib_context� ssl_version�context�_prot_pr r ) r r r r r r� r� r� r r r� r r r r � s" zFTP_TLS.__init__Tc C s, |r t | jtj� r | j� tj| |||�S )N)r� r r� � SSLSocket�authr r )r r r r Zsecurer r r r � s z
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|S )z2Set up secure control connection by using TLS/SSL.zAlready using TLSzAUTH TLSzAUTH SSL)�server_hostnamer$ )�moder% )r� r r� r� rB r� �PROTOCOL_SSLv23rd r� � wrap_socketr r* r% r+ )r rY r r r r� � s
z FTP_TLS.authc C s0 t | jtj�std��| jd�}| jj� | _|S )z/Switch back to a clear-text control connection.z
not using TLSZCCC)r� r r� r� rB rd r� )r rY r r r �ccc s
z FTP_TLS.cccc C s | j d� | j d�}d| _|S )z Set up secure data connection.zPBSZ 0zPROT PT)rd r� )r rY r r r �prot_p s
zFTP_TLS.prot_pc C s | j d�}d| _|S )z"Set up clear text data connection.zPROT CF)rd r� )r rY r r r �prot_c s
zFTP_TLS.prot_cc C s2 t j| ||�\}}| jr*| jj|| jd�}||fS )N)r� )r r r� r� r� r )r rb r| r~ r} r r r r $ s
zFTP_TLS.ntransfercmdc C s8 dt }| jj|� | j� }|d d� dkr4t|��|S )Ns ABORrO r\ r] r^ > r\ r^ r] )r_ r rD rS r )r rF rY r r r ra + s z
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r� c C s\ | dd� dkrt | ��tdkr<ddl}|jd|j|jB �atj| �}|sNdS t|jd��S )z�Parse the '150' response for a RETR request.
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NrO rz r z150 .* \((\d+) bytes\)r ) r �_150_re�re�compile�
IGNORECASE�ASCII�matchr� �group)rY r� �mr r r r{ : s
r{ c C s� | dd� dkrt | ��tdkr6ddl}|jd|j�atj| �}|sLt| ��|j� }dj|dd� �}t |d �d> t |d � }||fS )
z�Parse the '227' response for a PASV request.
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Return ('host.addr.as.numbers', port#) tuple.NrO Z227r z#(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)re rP � r7 )
r �_227_rer� r� r� �searchr �groupsri r� )rY r� r� Znumbersr r& r r r rv N s
rv c C s� | dd� dkrt | ��| jd�}|dk r2t| ��| jd|d �}|dk rRt| ��| |d | |d krrt| ��| |d |� j| |d �}t|�dkr�t| ��|d }t|d �}||fS ) z�Parse the '229' response for an EPSV request.
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Return ('host.addr.as.numbers', port#) tuple.NrO Z229�(r �)r r7 )r �findr rh r; r� )rY Zpeer�left�right�partsr r& r r r rx b s
rx c C s� | dd� dkrt | ��| dd� dkr,dS d}d}t| �}xJ||k r�| | }|d }|dkr|||ksr| | dkrtP |d }|| }q>W |S ) z�Parse the '257' response for a MKD or PWD request.
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r� c C s t | � dS )z+Default retrlines callback to print a line.N)r/ )rF r r r r� � s r� r �Ic C s� |s|}d| }| j |� |j |� t| jd��\}}|j||� |jd| �}|dd� d krdt�| jd| �}|dd� d
kr�t�| j� |j� dS ) z+Copy file from one FTP-instance to another.zTYPE ru zSTOR NrO �125rz zRETR > r� rz > r� rz )rd rv rc rk r r[ ) �sourceZ
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Usage: ftp [-d] [-r[file]] host [-l[dir]] [-d[dir]] [-p] [file] ...
-d dir
-l list
-p password
rI r Nr z-dz-rr z5Could not open account file -- using anonymous login.z$No account -- using anonymous login.z-lZCWDr� z-pzRETR i )r; �sys�argvr/ �testr� �exit�netrcr r3 r �stderr�writeZauthenticators�KeyErrorr r� rc r6 r4 r� �stdoutr ) r� r. Zrcfiler ZftpZuseridr r Znetrcobjr+ rb rY r r r r� � sP
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it is false, the contents of the files pointed to by symbolic
links are copied. If the file pointed by the symlink doesn't
exist, an exception will be added in the list of errors raised in
an Error exception at the end of the copy process.
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want to silence this exception. Notice that this has no effect on
platforms that don't support os.symlink.
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being visited by copytree(), and `names` which is the list of
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list of names relative to the `src` directory that should
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t| |�S dS )a� Recursively delete a directory tree.
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A lot more could be done here... A look at a mv.c shows a lot of
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Nz$Destination path '%s' already existsz.Cannot move a directory '%s' into itself '%s'.T)rq ro )r, r- r_ r3 �renamer` r� rl r
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Nr� r� Zgz�bzip2�bz2�xzzCbad value for 'compress', or compression format not supported : {0}r �.z.tarz creating %szCreating tar archivec s, � d k r� | _ �| _�d k r(�| _�| _| S )N)�gidZgname�uid�uname)Ztarinfo)r� �group�ownerr� r r! � _set_uid_gid� s z#_make_tarball.<locals>._set_uid_gidzw|%s)rd )�_ZLIB_SUPPORTED�_BZ2_SUPPORTED�_LZMA_SUPPORTED�
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"bztar", or "xztar". Or any other registered format.
'root_dir' is a directory that will be the root directory of the
archive; ie. we typically chdir into 'root_dir' before creating the
archive. 'base_dir' is the directory where we start archiving from;
ie. 'base_dir' will be the common prefix of all files and
directories in the archive. 'root_dir' and 'base_dir' both default
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'owner' and 'group' are used when creating a tar archive. By default,
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exception.
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description can be provided to describe the format, and will be returned
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N)r� r� )rL r� r� r� r� r r r! r M s c C s
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class AsyncContextManager(Generic[T_co]):
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async def __aenter__(self):
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async def __aexit__(self, exc_type, exc_value, traceback):
return None
@classmethod
def __subclasshook__(cls, C):
if cls is AsyncContextManager:
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return _collections_abc._check_methods(C, "__aenter__", "__aexit__")
if (any("__aenter__" in B.__dict__ for B in C.__mro__) and
any("__aexit__" in B.__dict__ for B in C.__mro__)):
return True
return NotImplemented
__all__.append('AsyncContextManager')
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The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
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- A deep copy constructs a new compound object and then, recursively,
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Two problems often exist with deep copy operations that don't exist
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administrative data structures that should be shared even between
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Python's deep copy operation avoids these problems by:
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�rr dd=lKmJZJ Y nX d>d?� ZLdS )Az;Thread module emulating a subset of Java's threading model.� N)� monotonic�sleep)�
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stack_sizec C s | a dS )z�Set a profile function for all threads started from the threading module.
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N)� _trace_hook)r r r r! r < s c O s t dkrt| |�S t | |�S )a2 Factory function that returns a new reentrant lock.
A reentrant lock must be released by the thread that acquired it. Once a
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dd� Z dd� Z dS )�_RLocka, This class implements reentrant lock objects.
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again without blocking; the thread must release it once for each time it
has acquired it.
c C s t � | _d | _d| _d S )Nr )�_allocate_lock�_block�_owner�_count)�selfr r r! �__init__a s z_RLock.__init__c C s^ | j }yt| j}W n tk
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t | ��f S )Nz)<%s %s.%s object owner=%r count=%d at %s>�lockedZunlocked) r* �_active�name�KeyErrorr) r. � __class__�
__module__� __qualname__r+ �hex�id)r, �ownerr r r! �__repr__f s z_RLock.__repr__T� c C sD t � }| j|kr"| jd7 _dS | jj||�}|r@|| _d| _|S )a Acquire a lock, blocking or non-blocking.
When invoked without arguments: if this thread already owns the lock,
increment the recursion level by one, and return immediately. Otherwise,
if another thread owns the lock, block until the lock is unlocked. Once
the lock is unlocked (not owned by any thread), then grab ownership, set
the recursion level to one, and return. If more than one thread is
blocked waiting until the lock is unlocked, only one at a time will be
able to grab ownership of the lock. There is no return value in this
case.
When invoked with the blocking argument set to true, do the same thing
as when called without arguments, and return true.
When invoked with the blocking argument set to false, do not block. If a
call without an argument would block, return false immediately;
otherwise, do the same thing as when called without arguments, and
return true.
When invoked with the floating-point timeout argument set to a positive
value, block for at most the number of seconds specified by timeout
and as long as the lock cannot be acquired. Return true if the lock has
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r9 )r r* r+ r) �acquire)r, �blocking�timeout�me�rcr r r! r: u s
z_RLock.acquirec C s< | j t� krtd��| jd | _}|s8d| _ | jj� dS )am Release a lock, decrementing the recursion level.
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by any thread), and if any other threads are blocked waiting for the
lock to become unlocked, allow exactly one of them to proceed. If after
the decrement the recursion level is still nonzero, the lock remains
locked and owned by the calling thread.
Only call this method when the calling thread owns the lock. A
RuntimeError is raised if this method is called when the lock is
unlocked.
There is no return value.
z cannot release un-acquired lockr9 N)r* r � RuntimeErrorr+ r) �release)r, r r r r! r@ � s z_RLock.releasec C s | j � d S )N)r@ )r, �t�v�tbr r r! �__exit__� s z_RLock.__exit__c C s | j j� |\| _| _d S )N)r) r: r+ r* )r, �stater r r! �_acquire_restore� s
z_RLock._acquire_restorec C s< | j dkrtd��| j }d| _ | j}d | _| jj� ||fS )Nr z cannot release un-acquired lock)r+ r? r* r) r@ )r, r r7 r r r! �
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notified by another thread.
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object, and it is used as the underlying lock. Otherwise, a new RLock object
is created and used as the underlying lock.
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zCondition._is_ownedc C s� | j � std��t� }|j� | jj|� | j� }d}z�|dkrN|j� d}nj|dkr�t� | }d}xR|jd�}|rvP t|t� |�}|dkr�P t|d |d�}t |� qfW n
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r� Y nX X dS ) ak Wait until notified or until a timeout occurs.
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awakened by a notify() or notify_all() call for the same condition
variable in another thread, or until the optional timeout occurs. Once
awakened or timed out, it re-acquires the lock and returns.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
When the underlying lock is an RLock, it is not released using its
release() method, since this may not actually unlock the lock when it
was acquired multiple times recursively. Instead, an internal interface
of the RLock class is used, which really unlocks it even when it has
been recursively acquired several times. Another internal interface is
then used to restore the recursion level when the lock is reacquired.
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zCondition.waitc C s\ d}|}|� }xH|sV|dk rD|dkr0t � | }n|t � }|dkrDP | j|� |� }qW |S )z�Wait until a condition evaluates to True.
predicate should be a callable which result will be interpreted as a
boolean value. A timeout may be provided giving the maximum time to
wait.
Nr )rV r] )r, Z predicater< r\ Zwaittime�resultr r r! �wait_forI s
zCondition.wait_forr9 c C sj | j � std��| j}tt||��}|s,dS x8|D ]0}|j� y|j|� W q2 tk
r` Y q2X q2W dS )aK Wake up one or more threads waiting on this condition, if any.
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called, a RuntimeError is raised.
This method wakes up at most n of the threads waiting for the condition
variable; it is a no-op if no threads are waiting.
z!cannot notify on un-acquired lockN)rH r? rP rO �_islicer@ rY rZ )r, �nZ all_waitersZwaiters_to_notifyr[ r r r! �notify` s
zCondition.notifyc C s | j t| j�� dS )z�Wake up all threads waiting on this condition.
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N)rb rR rP )r, r r r! �
notify_allw s zCondition.notify_all)N)N)N)r9 )rJ r3 r4 rK r- rL rD r8 rG rF rH r] r_ rb rc Z notifyAllr r r r! r � s
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dd�Zddd�ZeZd d
� Zd d � ZdS )r aG This class implements semaphore objects.
Semaphores manage a counter representing the number of release() calls minus
the number of acquire() calls, plus an initial value. The acquire() method
blocks if necessary until it can return without making the counter
negative. If not given, value defaults to 1.
r9 c C s& |dk rt d��tt� �| _|| _d S )Nr z$semaphore initial value must be >= 0)rZ r r �_cond�_value)r, �valuer r r! r- � s zSemaphore.__init__TNc
C s� | r|dk rt d��d}d}| j�j xb| jdkrv|s8P |dk rh|dkrTt� | }n|t� }|dkrhP | jj|� q(W | jd8 _d}W dQ R X |S )a� Acquire a semaphore, decrementing the internal counter by one.
When invoked without arguments: if the internal counter is larger than
zero on entry, decrement it by one and return immediately. If it is zero
on entry, block, waiting until some other thread has called release() to
make it larger than zero. This is done with proper interlocking so that
if multiple acquire() calls are blocked, release() will wake exactly one
of them up. The implementation may pick one at random, so the order in
which blocked threads are awakened should not be relied on. There is no
return value in this case.
When invoked with blocking set to true, do the same thing as when called
without arguments, and return true.
When invoked with blocking set to false, do not block. If a call without
an argument would block, return false immediately; otherwise, do the
same thing as when called without arguments, and return true.
When invoked with a timeout other than None, it will block for at
most timeout seconds. If acquire does not complete successfully in
that interval, return false. Return true otherwise.
Nz.can't specify timeout for non-blocking acquireFr r9 T)rZ rd re rV r] )r, r; r< r> r\ r r r! r: � s$
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C s. | j � | jd7 _| j j� W dQ R X dS )z�Release a semaphore, incrementing the internal counter by one.
When the counter is zero on entry and another thread is waiting for it
to become larger than zero again, wake up that thread.
r9 N)rd re rb )r, r r r! r@ � s zSemaphore.releasec C s | j � d S )N)r@ )r, rA rB rC r r r! rD � s zSemaphore.__exit__)r9 )TN) rJ r3 r4 rK r- r: rL r@ rD r r r r! r � s
- c @ s" e Zd ZdZddd�Zdd� ZdS ) r a� Implements a bounded semaphore.
A bounded semaphore checks to make sure its current value doesn't exceed its
initial value. If it does, ValueError is raised. In most situations
semaphores are used to guard resources with limited capacity.
If the semaphore is released too many times it's a sign of a bug. If not
given, value defaults to 1.
Like regular semaphores, bounded semaphores manage a counter representing
the number of release() calls minus the number of acquire() calls, plus an
initial value. The acquire() method blocks if necessary until it can return
without making the counter negative. If not given, value defaults to 1.
r9 c C s t j| |� || _d S )N)r r- �_initial_value)r, rf r r r! r- � s zBoundedSemaphore.__init__c
C sB | j �2 | j| jkr td��| jd7 _| j j� W dQ R X dS )a6 Release a semaphore, incrementing the internal counter by one.
When the counter is zero on entry and another thread is waiting for it
to become larger than zero again, wake up that thread.
If the number of releases exceeds the number of acquires,
raise a ValueError.
z!Semaphore released too many timesr9 N)rd re rg rZ rb )r, r r r! r@ � s
zBoundedSemaphore.releaseN)r9 )rJ r3 r4 rK r- r@ r r r r! r � s
c @ sF e Zd ZdZdd� Zdd� Zdd� ZeZdd � Zd
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Events manage a flag that can be set to true with the set() method and reset
to false with the clear() method. The wait() method blocks until the flag is
true. The flag is initially false.
c C s t t� �| _d| _d S )NF)r r rd �_flag)r, r r r! r- s zEvent.__init__c C s | j jt� � d S )N)rd r- r )r, r r r! �_reset_internal_locks s zEvent._reset_internal_locksc C s | j S )z5Return true if and only if the internal flag is true.)rh )r, r r r! �is_set s z Event.is_setc C s& | j � d| _| j j� W dQ R X dS )z�Set the internal flag to true.
All threads waiting for it to become true are awakened. Threads
that call wait() once the flag is true will not block at all.
TN)rd rh rc )r, r r r! �set s z Event.setc C s | j � d| _W dQ R X dS )z�Reset the internal flag to false.
Subsequently, threads calling wait() will block until set() is called to
set the internal flag to true again.
FN)rd rh )r, r r r! �clear s z Event.clearNc C s, | j � | j}|s | j j|�}|S Q R X dS )aH Block until the internal flag is true.
If the internal flag is true on entry, return immediately. Otherwise,
block until another thread calls set() to set the flag to true, or until
the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
This method returns the internal flag on exit, so it will always return
True except if a timeout is given and the operation times out.
N)rd rh r] )r, r< Zsignaledr r r! r] ' s
z
Event.wait)N) rJ r3 r4 rK r- ri rj ZisSetrk rl r] r r r r! r � s
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d� Z dd� Z
dd� Z dd� Z e
dd� �Ze
dd� �Ze
dd� �ZdS ) r z�Implements a Barrier.
Useful for synchronizing a fixed number of threads at known synchronization
points. Threads block on 'wait()' and are simultaneously once they have all
made that call.
Nc C s. t t� �| _|| _|| _|| _d| _d| _dS )aW Create a barrier, initialised to 'parties' threads.
'action' is a callable which, when supplied, will be called by one of
the threads after they have all entered the barrier and just prior to
releasing them all. If a 'timeout' is provided, it is uses as the
default for all subsequent 'wait()' calls.
r N)r r rd �_action�_timeout�_parties�_stater+ )r, �parties�actionr< r r r! r- Q s zBarrier.__init__c C s� |dkr| j }| j�b | j� | j}| jd7 _z&|d | jkrL| j� n
| j|� |S | jd8 _| j� X W dQ R X dS )aN Wait for the barrier.
When the specified number of threads have started waiting, they are all
simultaneously awoken. If an 'action' was provided for the barrier, one
of the threads will have executed that callback prior to returning.
Returns an individual index number from 0 to 'parties-1'.
Nr9 )rn rd �_enterr+ ro �_release�_wait�_exit)r, r< �indexr r r! r] a s
z Barrier.waitc C s, x| j dkr| jj� qW | j dk r(t�d S )Nr9 r rI )rI r9 )rp rd r] r )r, r r r! rs s
zBarrier._enterc C s> y"| j r| j � d| _| jj� W n | j� � Y nX d S )Nr9 )rm rp rd rc �_break)r, r r r! rt � s zBarrier._releasec s4 � j j� fdd�|�s"� j� t�� jdk r0t�d S )Nc s
� j dkS )Nr )rp r )r, r r! �<lambda>� s z Barrier._wait.<locals>.<lambda>r )rd r_ rx r rp )r, r< r )r, r! ru � s
z
Barrier._waitc C s( | j dkr$| jdkr$d| _| jj� d S )Nr r9 rI )rI r9 )r+ rp rd rc )r, r r r! rv � s
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Barrier._exitc C sT | j �D | jdkr6| jdkr$d| _q<| jdkr<d| _nd| _| j j� W dQ R X dS )z�Reset the barrier to the initial state.
Any threads currently waiting will get the BrokenBarrier exception
raised.
r r9 rT NrI ���rI )rd r+ rp rc )r, r r r! �reset� s
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Barrier.resetc C s | j � | j� W dQ R X dS )z�Place the barrier into a 'broken' state.
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Unless explicitly stated otherwise, the description below is true
both for AIFF-C files and AIFF files.
An AIFF-C file has the following structure.
+-----------------+
| FORM |
+-----------------+
| <size> |
+----+------------+
| | AIFC |
| +------------+
| | <chunks> |
| | . |
| | . |
| | . |
+----+------------+
An AIFF file has the string "AIFF" instead of "AIFC".
A chunk consists of an identifier (4 bytes) followed by a size (4 bytes,
big endian order), followed by the data. The size field does not include
the size of the 8 byte header.
The following chunk types are recognized.
FVER
<version number of AIFF-C defining document> (AIFF-C only).
MARK
<# of markers> (2 bytes)
list of markers:
<marker ID> (2 bytes, must be > 0)
<position> (4 bytes)
<marker name> ("pstring")
COMM
<# of channels> (2 bytes)
<# of sound frames> (4 bytes)
<size of the samples> (2 bytes)
<sampling frequency> (10 bytes, IEEE 80-bit extended
floating point)
in AIFF-C files only:
<compression type> (4 bytes)
<human-readable version of compression type> ("pstring")
SSND
<offset> (4 bytes, not used by this program)
<blocksize> (4 bytes, not used by this program)
<sound data>
A pstring consists of 1 byte length, a string of characters, and 0 or 1
byte pad to make the total length even.
Usage.
Reading AIFF files:
f = aifc.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
In some types of audio files, if the setpos() method is not used,
the seek() method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for AIFF files)
getcompname() -- returns human-readable version of
compression type ('not compressed' for AIFF files)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- get the list of marks in the audio file or None
if there are no marks
getmark(id) -- get mark with the specified id (raises an error
if the mark does not exist)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell(), the position given to setpos() and
the position of marks are all compatible and have nothing to do with
the actual position in the file.
The close() method is called automatically when the class instance
is destroyed.
Writing AIFF files:
f = aifc.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
aiff() -- create an AIFF file (AIFF-C default)
aifc() -- create an AIFF-C file
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
setmark(id, pos, name)
-- add specified mark to the list of marks
tell() -- return current position in output file (useful
in combination with setmark())
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
Marks can be added anytime. If there are any marks, you must call
close() after all frames have been written.
The close() method is called automatically when the class instance
is destroyed.
When a file is opened with the extension '.aiff', an AIFF file is
written, otherwise an AIFF-C file is written. This default can be
changed by calling aiff() or aifc() before the first writeframes or
writeframesraw.
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Basic statistics module.
This module provides functions for calculating statistics of data, including
averages, variance, and standard deviation.
Calculating averages
--------------------
================== =============================================
Function Description
================== =============================================
mean Arithmetic mean (average) of data.
harmonic_mean Harmonic mean of data.
median Median (middle value) of data.
median_low Low median of data.
median_high High median of data.
median_grouped Median, or 50th percentile, of grouped data.
mode Mode (most common value) of data.
================== =============================================
Calculate the arithmetic mean ("the average") of data:
>>> mean([-1.0, 2.5, 3.25, 5.75])
2.625
Calculate the standard median of discrete data:
>>> median([2, 3, 4, 5])
3.5
Calculate the median, or 50th percentile, of data grouped into class intervals
centred on the data values provided. E.g. if your data points are rounded to
the nearest whole number:
>>> median_grouped([2, 2, 3, 3, 3, 4]) #doctest: +ELLIPSIS
2.8333333333...
This should be interpreted in this way: you have two data points in the class
interval 1.5-2.5, three data points in the class interval 2.5-3.5, and one in
the class interval 3.5-4.5. The median of these data points is 2.8333...
Calculating variability or spread
---------------------------------
================== =============================================
Function Description
================== =============================================
pvariance Population variance of data.
variance Sample variance of data.
pstdev Population standard deviation of data.
stdev Sample standard deviation of data.
================== =============================================
Calculate the standard deviation of sample data:
>>> stdev([2.5, 3.25, 5.5, 11.25, 11.75]) #doctest: +ELLIPSIS
4.38961843444...
If you have previously calculated the mean, you can pass it as the optional
second argument to the four "spread" functions to avoid recalculating it:
>>> data = [1, 2, 2, 4, 4, 4, 5, 6]
>>> mu = mean(data)
>>> pvariance(data, mu)
2.5
Exceptions
----------
A single exception is defined: StatisticsError is a subclass of ValueError.
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|fS )aC _sum(data [, start]) -> (type, sum, count)
Return a high-precision sum of the given numeric data as a fraction,
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If ``data`` is empty, ``start`` (defaulting to 0) is returned.
Examples
--------
>>> _sum([3, 2.25, 4.5, -0.5, 1.0], 0.75)
(<class 'float'>, Fraction(11, 1), 5)
Some sources of round-off error will be avoided:
# Built-in sum returns zero.
>>> _sum([1e50, 1, -1e50] * 1000)
(<class 'float'>, Fraction(1000, 1), 3000)
Fractions and Decimals are also supported:
>>> from fractions import Fraction as F
>>> _sum([F(2, 3), F(7, 5), F(1, 4), F(5, 6)])
(<class 'fractions.Fraction'>, Fraction(63, 20), 4)
>>> from decimal import Decimal as D
>>> data = [D("0.1375"), D("0.2108"), D("0.3061"), D("0.0419")]
>>> _sum(data)
(<class 'decimal.Decimal'>, Fraction(6963, 10000), 4)
Mixed types are currently treated as an error, except that int is
allowed.
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rQ c C sH t | �| krt| �} t| �}|dk r,td��t| �\}}}t|| |�S )a� Return the sample arithmetic mean of data.
>>> mean([1, 2, 3, 4, 4])
2.8
>>> from fractions import Fraction as F
>>> mean([F(3, 7), F(1, 21), F(5, 3), F(1, 3)])
Fraction(13, 21)
>>> from decimal import Decimal as D
>>> mean([D("0.5"), D("0.75"), D("0.625"), D("0.375")])
Decimal('0.5625')
If ``data`` is empty, StatisticsError will be raised.
r z%mean requires at least one data point)rC �listrF r r. r@ )r' r r* r- r) r r r r
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r� dS X t || |�S )a Return the harmonic mean of data.
The harmonic mean, sometimes called the subcontrary mean, is the
reciprocal of the arithmetic mean of the reciprocals of the data,
and is often appropriate when averaging quantities which are rates
or ratios, for example speeds. Example:
Suppose an investor purchases an equal value of shares in each of
three companies, with P/E (price/earning) ratios of 2.5, 3 and 10.
What is the average P/E ratio for the investor's portfolio?
>>> harmonic_mean([2.5, 3, 10]) # For an equal investment portfolio.
3.6
Using the arithmetic mean would give an average of about 5.167, which
is too high.
If ``data`` is empty, or any element is less than zero,
``harmonic_mean`` will raise ``StatisticsError``.
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"c C s\ t | �} t| �}|dkr td��|d dkr8| |d S |d }| |d | | d S dS )aB Return the median (middle value) of numeric data.
When the number of data points is odd, return the middle data point.
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3
>>> median([1, 3, 5, 7])
4.0
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c C sL t | �} t| �}|dkr td��|d dkr8| |d S | |d d S dS )a Return the low median of numeric data.
When the number of data points is odd, the middle value is returned.
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3
>>> median_low([1, 3, 5, 7])
3
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zno median for empty datarV r N)r% rF r )r' r r r r r � s c C s, t | �} t| �}|dkr td��| |d S )a Return the high median of data.
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3
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5
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3.7
>>> median_grouped([52, 52, 53, 54])
52.5
This calculates the median as the 50th percentile, and should be
used when your data is continuous and grouped. In the above example,
the values 1, 2, 3, etc. actually represent the midpoint of classes
0.5-1.5, 1.5-2.5, 2.5-3.5, etc. The middle value falls somewhere in
class 3.5-4.5, and interpolation is used to estimate it.
Optional argument ``interval`` represents the class interval, and
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interpolated 50th percentile value:
>>> median_grouped([1, 3, 3, 5, 7], interval=1)
3.25
>>> median_grouped([1, 3, 3, 5, 7], interval=2)
3.5
This function does not check whether the data points are at least
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>>> mode([1, 1, 2, 3, 3, 3, 3, 4])
3
This also works with nominal (non-numeric) data:
>>> mode(["red", "blue", "blue", "red", "green", "red", "red"])
'red'
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def repeat(x: T, n: int) -> List[T]:
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class Employee: pass
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aC Abstract base class for generic types.
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r� Y nX | S )aI Decorator to indicate that annotations are not type hints.
The argument must be a class or function; if it is a class, it
applies recursively to all methods and classes defined in that class
(but not to methods defined in its superclasses or subclasses).
This mutates the function(s) or class(es) in place.
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rl ro r �copyr' r� r� �valuesr� r� r! r9 rP )r{ Z arg_attrsr r r� rC rC rD r9 s
c s t j� �� fdd��}|S )z�Decorator to give another decorator the @no_type_check effect.
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c s � | |�}t |�}|S )N)r9 )r\ r] r� )� decoratorrC rD �wrapped_decorator/ s
z2no_type_check_decorator.<locals>.wrapped_decorator)r� r� )r, r- rC )r, rD r: ( s c O s t d��dS )z*Helper for @overload to raise when called.z�You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.N)�NotImplementedError)r\ r] rC rC rD �_overload_dummy8 s r/ c C s t S )a
Decorator for overloaded functions/methods.
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function in a row, each decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
In a non-stub file (i.e. a regular .py file), do the same but
follow it with an implementation. The implementation should *not*
be decorated with @overload. For example:
@overload
def utf8(value: None) -> None: ...
@overload
def utf8(value: bytes) -> bytes: ...
@overload
def utf8(value: str) -> bytes: ...
def utf8(value):
# implementation goes here
)r/ )r� rC rC rD r; A s c s0 e Zd ZdZ� fdd�Zdd� Zdd� Z� ZS )�
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tS | tkrdS | j� }x(|D ] � t� fdd�|jD ��s$dS q$W dS )NTc 3 s | ]}� |j kV qd S )N)r )r� �d)r rC rD r� w s z2_ProtocolMeta.__subclasscheck__.<locals>.<genexpr>F)rh r~ r� �_get_protocol_attrsr� r� )r[ rV �attrsrC )r rD r� j s
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krT|dkrT|dkrT|dkrT|dkrT|dkrT|dkrT|j|� qTW qBW |S )Nrh Fr� r �__abstractmethods__r" rj r� r r� rq r2 r� r� r� r� r� r� rd ) r� r� rA r� r� r �keysrL �add)r[ Zprotocol_basesr� r3 r� r rC rC rD r2 { s< z!_ProtocolMeta._get_protocol_attrs)rA rd r@ rg r� r� r2 ri rC rC )rZ rD r0 ^ s r0 c @ s e Zd ZdZf ZdZdS )r� z�Internal base class for protocol classes.
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AsyncIterablec @ s e Zd Zf ZdS )r9 N)rA rd r@ rq rC rC rC rD r9 � s c @ s e Zd Zf ZdS )�
AsyncIteratorN)rA rd r@ rq rC rC rC rD r: � s r: c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s" e Zd Zf Zeed�dd��ZdS )r* )�returnc C s d S )NrC )r[ rC rC rD �__int__� s zSupportsInt.__int__N)rA rd r@ rq r �intr< rC rC rC rD r* � s c @ s" e Zd Zf Zeed�dd��ZdS )r) )r; c C s d S )NrC )r[ rC rC rD � __float__� s zSupportsFloat.__float__N)rA rd r@ rq r �floatr> rC rC rC rD r) � s c @ s" e Zd Zf Zeed�dd��ZdS )r( )r; c C s d S )NrC )r[ rC rC rD � __complex__� s zSupportsComplex.__complex__N)rA rd r@ rq r �complexr@ rC rC rC rD r( � s c @ s" e Zd Zf Zeed�dd��ZdS )r' )r; c C s d S )NrC )r[ rC rC rD � __bytes__� s zSupportsBytes.__bytes__N)rA rd r@ rq r �bytesrB rC rC rC rD r' � s c @ s" e Zd Zf Zeed�dd��ZdS )r& )r; c C s d S )NrC )r[ rC rC rD �__abs__� s zSupportsAbs.__abs__N)rA rd r@ rq r r� rD rC rC rC rD r& � s c @ s& e Zd Zf Zedeed�dd��ZdS )r+ r )�ndigitsr; c C s d S )NrC )r[ rE rC rC rD � __round__ s zSupportsRound.__round__N)r )rA rd r@ rq r r= r� rF rC rC rC rD r+ s c @ s e Zd Zf ZdS )r% N)rA rd r@ rq rC rC rC rD r%
s c @ s" e Zd Zf Zedd�dd��ZdS )r% zIterator[T_co])r; c C s d S )NrC )r[ rC rC rD � __reversed__ s zReversible.__reversed__N)rA rd r@ rq r rG rC rC rC rD r%
s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r s �
Collectionc @ s e Zd Zf ZdS )rH N)rA rd r@ rq rC rC rC rD rH s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ' s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r + s c @ s e Zd Zf ZdS )r! N)rA rd r@ rq rC rC rC rD r! 0 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r 6 s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r : s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r ? s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" E s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" I s c @ s e Zd Zf ZdS )r" N)rA rd r@ rq rC rC rC rD r" M s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r R s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r V s c @ s e Zd Zf Zdd� ZdS )r0 c O s$ | j tkrtd��tt| f|�|�S )Nz4Type List cannot be instantiated; use list() instead)r� r0 rP r r )rV r\ r] rC rC rD rU ^ s
z List.__new__N)rA rd r@ rq rU rC rC rC rD r0 Z s c @ s e Zd Zf Zdd� ZdS )r- c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r- � collections�dequer )rV r\ r] rC rC rD rU i s
z
Deque.__new__N)rA rd r@ rq rU rC rC rC rD r- e s c @ s e Zd Zf Zdd� ZdS )r1 c O s$ | j tkrtd��tt| f|�|�S )Nz2Type Set cannot be instantiated; use set() instead)r� r1 rP r r� )rV r\ r] rC rC rD rU s s
z Set.__new__N)rA rd r@ rq rU rC rC rC rD r1 o s c @ s e Zd Zf Zdd� ZdS )r2 c O s$ | j tkrtd��tt| f|�|�S )Nz>Type FrozenSet cannot be instantiated; use frozenset() instead)r� r2 rP r r� )rV r\ r] rC rC rD rU } s
zFrozenSet.__new__N)rA rd r@ rq rU rC rC rC rD r2 z s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s e Zd Zf ZdS )r$ N)rA rd r@ rq rC rC rC rD r$ � s �AbstractContextManagerc @ s e Zd Zf ZdS )r N)rA rd r@ rq rC rC rC rD r � s c @ s2 e Zd Zf Zdd� Zejdd� �Zedd� �Z dS )r c C s | S )NrC )r[ rC rC rD � __enter__� s zContextManager.__enter__c C s d S )NrC )r[ �exc_type� exc_value� tracebackrC rC rD �__exit__� s zContextManager.__exit__c C s8 | t kr4tdd� |jD ��r4tdd� |jD ��r4dS tS )Nc s s | ]}d |j kV qdS )rL N)r )r� �BrC rC rD r� � s z2ContextManager.__subclasshook__.<locals>.<genexpr>c s s | ]}d |j kV qdS )rP N)r )r� rQ rC rC rD r� � s T)r r� r� r~ )rV �CrC rC rD r� � s
z ContextManager.__subclasshook__N)
rA rd r@ rq rL r� r rP � classmethodr� rC rC rC rD r � s �AbstractAsyncContextManagerc @ s e Zd Zf ZdS )�AsyncContextManagerN)rA rd r@ rq rC rC rC rD rU � s rU � a�
class AsyncContextManager(Generic[T_co]):
__slots__ = ()
async def __aenter__(self):
return self
@abc.abstractmethod
async def __aexit__(self, exc_type, exc_value, traceback):
return None
@classmethod
def __subclasshook__(cls, C):
if cls is AsyncContextManager:
if sys.version_info[:2] >= (3, 6):
return _collections_abc._check_methods(C, "__aenter__", "__aexit__")
if (any("__aenter__" in B.__dict__ for B in C.__mro__) and
any("__aexit__" in B.__dict__ for B in C.__mro__)):
return True
return NotImplemented
__all__.append('AsyncContextManager')
c @ s e Zd Zf Zdd� ZdS )r. c O s$ | j tkrtd��tt| f|�|�S )Nz4Type Dict cannot be instantiated; use dict() instead)r� r. rP r r� )rV r\ r] rC rC rD rU � s
z Dict.__new__N)rA rd r@ rq rU rC rC rC rD r. � s c @ s e Zd Zf Zdd� ZdS )r/ c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r/ rI � defaultdictr )rV r\ r] rC rC rD rU � s
zDefaultDict.__new__N)rA rd r@ rq rU rC rC rC rD r/ � s c @ s e Zd Zf Zdd� ZdS )r, c O s* | j tkrtj||�S ttj| f|�|�S )N)r� r, rI r )rV r\ r] rC rC rD rU � s
zCounter.__new__N)rA rd r@ rq rU rC rC rC rD r, � s �ChainMapc @ s e Zd Zf Zdd� ZdS )rX c O s* | j tkrtj||�S ttj| f|�|�S )N)r� rX rI r )rV r\ r] rC rC rD rU � s
zChainMap.__new__N)rA rd r@ rq rU rC rC rC rD rX � s c @ s e Zd Zf Zdd� ZdS )r4 c O s$ | j tkrtd��tt| f|�|�S )Nz@Type Generator cannot be instantiated; create a subclass instead)r� r4 rP r �_G_base)rV r\ r] rC rC rD rU s
zGenerator.__new__N)rA rd r@ rq rU rC rC rC rD r4 s �AsyncGeneratorc @ s e Zd Zf ZdS )rZ N)rA rd r@ rq rC rC rC rD rZ s �CT_co)r� r� c @ s e Zd ZdZf ZdS )r a� A special construct usable to annotate class objects.
For example, suppose we have the following classes::
class User: ... # Abstract base for User classes
class BasicUser(User): ...
class ProUser(User): ...
class TeamUser(User): ...
And a function that takes a class argument that's a subclass of
User and returns an instance of the corresponding class::
U = TypeVar('U', bound=User)
def new_user(user_class: Type[U]) -> U:
user = user_class()
# (Here we could write the user object to a database)
return user
joe = new_user(BasicUser)
At this point the type checker knows that joe has type BasicUser.
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<listcomp>A s z!_make_nmtuple.<locals>.<listcomp>c S s g | ] \}}|�qS rC rC )r� r\ r� rC rC rD r] B s r rA �__main__) rI �
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zNamedTupleMeta.__new__)rA rd r@ rU ri rC rC )rZ rD rk W s rk c @ s e Zd ZdZdZddd�ZdS )r3 a4 Typed version of namedtuple.
Usage in Python versions >= 3.6::
class Employee(NamedTuple):
name: str
id: int
This is equivalent to::
Employee = collections.namedtuple('Employee', ['name', 'id'])
The resulting class has extra __annotations__ and _field_types
attributes, giving an ordered dict mapping field names to types.
__annotations__ should be preferred, while _field_types
is kept to maintain pre PEP 526 compatibility. (The field names
are in the _fields attribute, which is part of the namedtuple
API.) Alternative equivalent keyword syntax is also accepted::
Employee = NamedTuple('Employee', name=str, id=int)
In Python versions <= 3.5 use::
Employee = NamedTuple('Employee', [('name', str), ('id', int)])
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zNamedTuple.__new__)N)rA rd r@ rg rO rU rC rC rC rD r3 y s c C s dd� }| |_ ||_|S )a% NewType creates simple unique types with almost zero
runtime overhead. NewType(name, tp) is considered a subtype of tp
by static type checkers. At runtime, NewType(name, tp) returns
a dummy function that simply returns its argument. Usage::
UserId = NewType('UserId', int)
def name_by_id(user_id: UserId) -> str:
...
UserId('user') # Fails type check
name_by_id(42) # Fails type check
name_by_id(UserId(42)) # OK
num = UserId(5) + 1 # type: int
c S s | S )NrC )rB rC rC rD �new_type� s zNewType.<locals>.new_type)rA Z
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d+�d,d-��Z e ee dd.�d/d0��Z e d1d�d2d3��Z e dd�d4d5��Z dS )>�IOa� Generic base class for TextIO and BinaryIO.
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NOTE: This does not distinguish between the different possible
classes (text vs. binary, read vs. write vs. read/write,
append-only, unbuffered). The TextIO and BinaryIO subclasses
below capture the distinctions between text vs. binary, which is
pervasive in the interface; however we currently do not offer a
way to track the other distinctions in the type system.
)r; c C s d S )NrC )r[ rC rC rD �mode� s zIO.modec C s d S )NrC )r[ rC rC rD rW � s zIO.nameNc C s d S )NrC )r[ rC rC rD �close� s zIO.closec C s d S )NrC )r[ rC rC rD �closed� s z IO.closedc C s d S )NrC )r[ rC rC rD �fileno� s z IO.filenoc C s d S )NrC )r[ rC rC rD �flush� s zIO.flushc C s d S )NrC )r[ rC rC rD �isatty� s z IO.isattyrK )r\ r; c C s d S )NrC )r[ r\ rC rC rD �read� s zIO.readc C s d S )NrC )r[ rC rC rD �readable� s z IO.readable)�limitr; c C s d S )NrC )r[ r rC rC rD �readline� s z IO.readline)�hintr; c C s d S )NrC )r[ r� rC rC rD � readlines� s z IO.readlinesr )�offset�whencer; c C s d S )NrC )r[ r� r� rC rC rD �seek� s zIO.seekc C s d S )NrC )r[ rC rC rD �seekable s z IO.seekablec C s d S )NrC )r[ rC rC rD �tell s zIO.tell)�sizer; c C s d S )NrC )r[ r� rC rC rD �truncate s z IO.truncatec C s d S )NrC )r[ rC rC rD �writable s z IO.writable)�sr; c C s d S )NrC )r[ r� rC rC rD �write s zIO.write)�linesr; c C s d S )NrC )r[ r� rC rC rD �
writelines s z
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IO[AnyStr]c C s d S )NrC )r[ rC rC rD rL s z IO.__enter__c C s d S )NrC )r[ ro r� rO rC rC rD rP s z IO.__exit__r� )r� r� )r� r� )r� )r )N) rA rd r@ rg rq r rm rw rW r rx r� ry r= rz r{ r| r5 r} r~ r� r0 r� r� r� r� r� r� r� r� rL rP rC rC rC rD rv � sT rv c @ sB e Zd ZdZf Zeeeef e d�dd��Z
ed d�dd��Z dS ) �BinaryIOz5Typed version of the return of open() in binary mode.)r� r; c C s d S )NrC )r[ r� rC rC rD r� ) s zBinaryIO.write)r; c C s d S )NrC )r[ rC rC rD rL - s zBinaryIO.__enter__N) rA rd r@ rg rq r r rC � bytearrayr= r� rL rC rC rC rD r� $ s r� c @ s� e Zd ZdZf Zeed�dd��Zeed�dd��Z ee
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r� r rL rC rC rC rD r� 2 s r� c @ s& e Zd ZdZdddgZeZeZeZdS )�ioz)Wrapper namespace for IO generic classes.rv r� r� N)rA rd r@ rg �__all__rv r� r� rC rC rC rD r� P s
r� z.io�Patternr� c C s | j S )N)�pattern)r� rC rC rD �<lambda>^ s r� �Matchc C s | j jS )N)�rer� )�mrC rC rD r� ` s c @ s e Zd ZdZddgZeZeZdS )r� z&Wrapper namespace for re type aliases.r� r� N)rA rd r@ rg r� r� r� rC rC rC rD r� c s r� z.re)r r )NN)NN)r rV )r r ) rU r^ rq rd re rf ra rg rh ri rj )rd rA r@ r" )�r� r r rI �
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guess_type(url, strict=True) -- guess the MIME type and encoding of a URL.
guess_extension(type, strict=True) -- guess the extension for a given MIME type.
It also contains the following, for tuning the behavior:
Data:
knownfiles -- list of files to parse
inited -- flag set when init() has been called
suffix_map -- dictionary mapping suffixes to suffixes
encodings_map -- dictionary mapping suffixes to encodings
types_map -- dictionary mapping suffixes to types
Functions:
init([files]) -- parse a list of files, default knownfiles (on Windows, the
default values are taken from the registry)
read_mime_types(file) -- parse one file, return a dictionary or None
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of the form type/subtype, usable for a MIME Content-type
header; and encoding is None for no encoding or the name of
the program used to encode (e.g. compress or gzip). The
mappings are table driven. Encoding suffixes are case
sensitive; type suffixes are first tried case sensitive, then
case insensitive.
The suffixes .tgz, .taz and .tz (case sensitive!) are all
mapped to '.tar.gz'. (This is table-driven too, using the
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extensions, including the leading dot ('.'). The extension is not
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extensionsr r r r r � s z MimeTypes.guess_all_extensionsc C s | j ||�}|sdS |d S )a Guess the extension for a file based on its MIME type.
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Command-line parsing library
This module is an optparse-inspired command-line parsing library that:
- handles both optional and positional arguments
- produces highly informative usage messages
- supports parsers that dispatch to sub-parsers
The following is a simple usage example that sums integers from the
command-line and writes the result to a file::
parser = argparse.ArgumentParser(
description='sum the integers at the command line')
parser.add_argument(
'integers', metavar='int', nargs='+', type=int,
help='an integer to be summed')
parser.add_argument(
'--log', default=sys.stdout, type=argparse.FileType('w'),
help='the file where the sum should be written')
args = parser.parse_args()
args.log.write('%s' % sum(args.integers))
args.log.close()
The module contains the following public classes:
- ArgumentParser -- The main entry point for command-line parsing. As the
example above shows, the add_argument() method is used to populate
the parser with actions for optional and positional arguments. Then
the parse_args() method is invoked to convert the args at the
command-line into an object with attributes.
- ArgumentError -- The exception raised by ArgumentParser objects when
there are errors with the parser's actions. Errors raised while
parsing the command-line are caught by ArgumentParser and emitted
as command-line messages.
- FileType -- A factory for defining types of files to be created. As the
example above shows, instances of FileType are typically passed as
the type= argument of add_argument() calls.
- Action -- The base class for parser actions. Typically actions are
selected by passing strings like 'store_true' or 'append_const' to
the action= argument of add_argument(). However, for greater
customization of ArgumentParser actions, subclasses of Action may
be defined and passed as the action= argument.
- HelpFormatter, RawDescriptionHelpFormatter, RawTextHelpFormatter,
ArgumentDefaultsHelpFormatter -- Formatter classes which
may be passed as the formatter_class= argument to the
ArgumentParser constructor. HelpFormatter is the default,
RawDescriptionHelpFormatter and RawTextHelpFormatter tell the parser
not to change the formatting for help text, and
ArgumentDefaultsHelpFormatter adds information about argument defaults
to the help.
All other classes in this module are considered implementation details.
(Also note that HelpFormatter and RawDescriptionHelpFormatter are only
considered public as object names -- the API of the formatter objects is
still considered an implementation detail.)
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all attributes of Action instances.
Keyword Arguments:
- option_strings -- A list of command-line option strings which
should be associated with this action.
- dest -- The name of the attribute to hold the created object(s)
- nargs -- The number of command-line arguments that should be
consumed. By default, one argument will be consumed and a single
value will be produced. Other values include:
- N (an integer) consumes N arguments (and produces a list)
- '?' consumes zero or one arguments
- '*' consumes zero or more arguments (and produces a list)
- '+' consumes one or more arguments (and produces a list)
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- const -- The value to be produced if the option is specified and the
option uses an action that takes no values.
- default -- The value to be produced if the option is not specified.
- type -- A callable that accepts a single string argument, and
returns the converted value. The standard Python types str, int,
float, and complex are useful examples of such callables. If None,
str is used.
- choices -- A container of values that should be allowed. If not None,
after a command-line argument has been converted to the appropriate
type, an exception will be raised if it is not a member of this
collection.
- required -- True if the action must always be specified at the
command line. This is only meaningful for optional command-line
arguments.
- help -- The help string describing the argument.
- metavar -- The name to be used for the option's argument with the
help string. If None, the 'dest' value will be used as the name.
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r a� Factory for creating file object types
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the builtin open() function.
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z*_ActionsContainer._handle_conflict_resolve)N)N)r r, r- rO r r r r! rr r+ r- r' r2 r5 r" r# r$ r r. r: r; r� r& r& )r� r' r
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- epilog -- Text following the argument descriptions
- parents -- Parsers whose arguments should be copied into this one
- formatter_class -- HelpFormatter class for printing help messages
- prefix_chars -- Characters that prefix optional arguments
- fromfile_prefix_chars -- Characters that prefix files containing
additional arguments
- argument_default -- The default value for all arguments
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- add_help -- Add a -h/-help option
- allow_abbrev -- Allow long options to be abbreviated unambiguously
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N�rr )�format�check�preset�filtersc C s& d| _ d| _t| _|dkrL|dkr*td��|dk r:td��|dkrFt}t}n@|dkr~|dkr`t}t}t ||||d�| _
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mode can be "r" for reading (default), "w" for (over)writing,
"x" for creating exclusively, or "a" for appending. These can
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format specifies the container format to use for the file.
If mode is "r", this defaults to FORMAT_AUTO. Otherwise, the
default is FORMAT_XZ.
check specifies the integrity check to use. This argument can
only be used when opening a file for writing. For FORMAT_XZ,
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support integrity checks - for these formats, check must be
omitted, or be CHECK_NONE.
When opening a file for reading, the *preset* argument is not
meaningful, and should be omitted. The *filters* argument should
also be omitted, except when format is FORMAT_RAW (in which case
it is required).
When opening a file for writing, the settings used by the
compressor can be specified either as a preset compression
level (with the *preset* argument), or in detail as a custom
filter chain (with the *filters* argument). For FORMAT_XZ and
FORMAT_ALONE, the default is to use the PRESET_DEFAULT preset
level. For FORMAT_RAW, the caller must always specify a filter
chain; the raw compressor does not support preset compression
levels.
preset (if provided) should be an integer in the range 0-9,
optionally OR-ed with the constant PRESET_EXTREME.
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The mode argument can be "r", "rb" (default), "w", "wb", "x", "xb",
"a", or "ab" for binary mode, or "rt", "wt", "xt", or "at" for text
mode.
The format, check, preset and filters arguments specify the
compression settings, as for LZMACompressor, LZMADecompressor and
LZMAFile.
For binary mode, this function is equivalent to the LZMAFile
constructor: LZMAFile(filename, mode, ...). In this case, the
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ast
~~~
The `ast` module helps Python applications to process trees of the Python
abstract syntax grammar. The abstract syntax itself might change with
each Python release; this module helps to find out programmatically what
the current grammar looks like and allows modifications of it.
An abstract syntax tree can be generated by passing `ast.PyCF_ONLY_AST` as
a flag to the `compile()` builtin function or by using the `parse()`
function from this module. The result will be a tree of objects whose
classes all inherit from `ast.AST`.
A modified abstract syntax tree can be compiled into a Python code object
using the built-in `compile()` function.
Additionally various helper functions are provided that make working with
the trees simpler. The main intention of the helper functions and this
module in general is to provide an easy to use interface for libraries
that work tightly with the python syntax (template engines for example).
:copyright: Copyright 2008 by Armin Ronacher.
:license: Python License.
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Parse the source into an AST node.
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Safely evaluate an expression node or a string containing a Python
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parent node. It works recursively starting at *node*.
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A node visitor base class that walks the abstract syntax tree and calls a
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methods.
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be `visit_TryFinally`. This behavior can be changed by overriding
the `visit` method. If no visitor function exists for a node
(return value `None`) the `generic_visit` visitor is used instead.
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A :class:`NodeVisitor` subclass that walks the abstract syntax tree and
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the visitor method is ``None``, the node will be removed from its location,
otherwise it is replaced with the return value. The return value may be the
original node in which case no replacement takes place.
Here is an example transformer that rewrites all occurrences of name lookups
(``foo``) to ``data['foo']``::
class RewriteName(NodeTransformer):
def visit_Name(self, node):
return copy_location(Subscript(
value=Name(id='data', ctx=Load()),
slice=Index(value=Str(s=node.id)),
ctx=node.ctx
), node)
Keep in mind that if the node you're operating on has child nodes you must
either transform the child nodes yourself or call the :meth:`generic_visit`
method for the node first.
For nodes that were part of a collection of statements (that applies to all
statement nodes), the visitor may also return a list of nodes rather than
just a single node.
Usually you use the transformer like this::
node = YourTransformer().visit(node)
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\ : � @ s@ d Z ddlZddlZdgZdZejej d ZG dd� d�ZdS )a A generic class to build line-oriented command interpreters.
Interpreters constructed with this class obey the following conventions:
1. End of file on input is processed as the command 'EOF'.
2. A command is parsed out of each line by collecting the prefix composed
of characters in the identchars member.
3. A command `foo' is dispatched to a method 'do_foo()'; the do_ method
is passed a single argument consisting of the remainder of the line.
4. Typing an empty line repeats the last command. (Actually, it calls the
method `emptyline', which may be overridden in a subclass.)
5. There is a predefined `help' method. Given an argument `topic', it
calls the command `help_topic'. With no arguments, it lists all topics
with defined help_ functions, broken into up to three topics; documented
commands, miscellaneous help topics, and undocumented commands.
6. The command '?' is a synonym for `help'. The command '!' is a synonym
for `shell', if a do_shell method exists.
7. If completion is enabled, completing commands will be done automatically,
and completing of commands args is done by calling complete_foo() with
arguments text, line, begidx, endidx. text is string we are matching
against, all returned matches must begin with it. line is the current
input line (lstripped), begidx and endidx are the beginning and end
indexes of the text being matched, which could be used to provide
different completion depending upon which position the argument is in.
The `default' method may be overridden to intercept commands for which there
is no do_ method.
The `completedefault' method may be overridden to intercept completions for
commands that have no complete_ method.
The data member `self.ruler' sets the character used to draw separator lines
in the help messages. If empty, no ruler line is drawn. It defaults to "=".
If the value of `self.intro' is nonempty when the cmdloop method is called,
it is printed out on interpreter startup. This value may be overridden
via an optional argument to the cmdloop() method.
The data members `self.doc_header', `self.misc_header', and
`self.undoc_header' set the headers used for the help function's
listings of documented functions, miscellaneous topics, and undocumented
functions respectively.
� N�Cmdz(Cmd) �_c @ s� e Zd ZdZeZeZdZdZ dZ
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A Cmd instance or subclass instance is a line-oriented interpreter
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completion key; it defaults to the Tab key. If completekey is
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is done automatically. The optional arguments stdin and stdout
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socket() -- create a new socket object
socketpair() -- create a pair of new socket objects [*]
fromfd() -- create a socket object from an open file descriptor [*]
fromshare() -- create a socket object from data received from socket.share() [*]
gethostname() -- return the current hostname
gethostbyname() -- map a hostname to its IP number
gethostbyaddr() -- map an IP number or hostname to DNS info
getservbyname() -- map a service name and a protocol name to a port number
getprotobyname() -- map a protocol name (e.g. 'tcp') to a number
ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
htons(), htonl() -- convert 16, 32 bit int from host to network byte order
inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
socket.getdefaulttimeout() -- get the default timeout value
socket.setdefaulttimeout() -- set the default timeout value
create_connection() -- connects to an address, with an optional timeout and
optional source address.
[*] not available on all platforms!
Special objects:
SocketType -- type object for socket objects
error -- exception raised for I/O errors
has_ipv6 -- boolean value indicating if IPv6 is supported
IntEnum constants:
AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)
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e!�Z$dS )+ap Generic socket server classes.
This module tries to capture the various aspects of defining a server:
For socket-based servers:
- address family:
- AF_INET{,6}: IP (Internet Protocol) sockets (default)
- AF_UNIX: Unix domain sockets
- others, e.g. AF_DECNET are conceivable (see <socket.h>
- socket type:
- SOCK_STREAM (reliable stream, e.g. TCP)
- SOCK_DGRAM (datagrams, e.g. UDP)
For request-based servers (including socket-based):
- client address verification before further looking at the request
(This is actually a hook for any processing that needs to look
at the request before anything else, e.g. logging)
- how to handle multiple requests:
- synchronous (one request is handled at a time)
- forking (each request is handled by a new process)
- threading (each request is handled by a new thread)
The classes in this module favor the server type that is simplest to
write: a synchronous TCP/IP server. This is bad class design, but
save some typing. (There's also the issue that a deep class hierarchy
slows down method lookups.)
There are five classes in an inheritance diagram, four of which represent
synchronous servers of four types:
+------------+
| BaseServer |
+------------+
|
v
+-----------+ +------------------+
| TCPServer |------->| UnixStreamServer |
+-----------+ +------------------+
|
v
+-----------+ +--------------------+
| UDPServer |------->| UnixDatagramServer |
+-----------+ +--------------------+
Note that UnixDatagramServer derives from UDPServer, not from
UnixStreamServer -- the only difference between an IP and a Unix
stream server is the address family, which is simply repeated in both
unix server classes.
Forking and threading versions of each type of server can be created
using the ForkingMixIn and ThreadingMixIn mix-in classes. For
instance, a threading UDP server class is created as follows:
class ThreadingUDPServer(ThreadingMixIn, UDPServer): pass
The Mix-in class must come first, since it overrides a method defined
in UDPServer! Setting the various member variables also changes
the behavior of the underlying server mechanism.
To implement a service, you must derive a class from
BaseRequestHandler and redefine its handle() method. You can then run
various versions of the service by combining one of the server classes
with your request handler class.
The request handler class must be different for datagram or stream
services. This can be hidden by using the request handler
subclasses StreamRequestHandler or DatagramRequestHandler.
Of course, you still have to use your head!
For instance, it makes no sense to use a forking server if the service
contains state in memory that can be modified by requests (since the
modifications in the child process would never reach the initial state
kept in the parent process and passed to each child). In this case,
you can use a threading server, but you will probably have to use
locks to avoid two requests that come in nearly simultaneous to apply
conflicting changes to the server state.
On the other hand, if you are building e.g. an HTTP server, where all
data is stored externally (e.g. in the file system), a synchronous
class will essentially render the service "deaf" while one request is
being handled -- which may be for a very long time if a client is slow
to read all the data it has requested. Here a threading or forking
server is appropriate.
In some cases, it may be appropriate to process part of a request
synchronously, but to finish processing in a forked child depending on
the request data. This can be implemented by using a synchronous
server and doing an explicit fork in the request handler class
handle() method.
Another approach to handling multiple simultaneous requests in an
environment that supports neither threads nor fork (or where these are
too expensive or inappropriate for the service) is to maintain an
explicit table of partially finished requests and to use a selector to
decide which request to work on next (or whether to handle a new
incoming request). This is particularly important for stream services
where each client can potentially be connected for a long time (if
threads or subprocesses cannot be used).
Future work:
- Standard classes for Sun RPC (which uses either UDP or TCP)
- Standard mix-in classes to implement various authentication
and encryption schemes
XXX Open problems:
- What to do with out-of-band data?
BaseServer:
- split generic "request" functionality out into BaseServer class.
Copyright (C) 2000 Luke Kenneth Casson Leighton <lkcl@samba.org>
example: read entries from a SQL database (requires overriding
get_request() to return a table entry from the database).
entry is processed by a RequestHandlerClass.
z0.4� N)�BufferedIOBase)� monotonic�
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- fileno() -> int # for selector
Methods that may be overridden:
- server_bind()
- server_activate()
- get_request() -> request, client_address
- handle_timeout()
- verify_request(request, client_address)
- server_close()
- process_request(request, client_address)
- shutdown_request(request)
- close_request(request)
- service_actions()
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Methods for derived classes:
- finish_request(request, client_address)
Class variables that may be overridden by derived classes or
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Instance variables:
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Nc C s || _ || _tj� | _d| _dS )z/Constructor. May be extended, do not override.FN)�server_address�RequestHandlerClass� threadingZEvent�_BaseServer__is_shut_down� _BaseServer__shutdown_request)�selfr r � r �$/usr/lib64/python3.6/socketserver.py�__init__� s
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C s� | j j� }|dkr| j}n| jdk r0t|| j�}|dk rBt� | }t� �R}|j| tj� x<|j |�}|rp| j
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Nr )r r r r � server_closeb s zBaseServer.server_closec C s | j ||| � dS )z8Finish one request by instantiating RequestHandlerClass.N)r )r r= r> r r r r? j s zBaseServer.finish_requestc C s | j |� dS )z3Called to shutdown and close an individual request.N)�
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S ) r a� Base class for request handler classes.
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defines a handle() method.
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4 ftplib.cpython-36.pyc 0000644 00000067307 15033571514 0010473 0 ustar 00 3
�\dh!� � @ sV d Z ddlZddlZddlmZ dddddd gZd
Zd Zd ZG d
d� de�Z G dd� de �Z
G dd� de �Z G dd� de �Z G dd� de �Z
e eefZdZdZG dd� d�Zy ddlZW n ek
r� dZY n0X ejZG dd� de�Zejd� e eeejfZdadd� Z da dd� Z d d � Z d d � Z d d!� Z!d)d$d%�Z"d&d'� Z#e$d(k�rRe#� dS )*aS An FTP client class and some helper functions.
Based on RFC 959: File Transfer Protocol (FTP), by J. Postel and J. Reynolds
Example:
>>> from ftplib import FTP
>>> ftp = FTP('ftp.python.org') # connect to host, default port
>>> ftp.login() # default, i.e.: user anonymous, passwd anonymous@
'230 Guest login ok, access restrictions apply.'
>>> ftp.retrlines('LIST') # list directory contents
total 9
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
'226 Transfer complete.'
>>> ftp.quit()
'221 Goodbye.'
>>>
A nice test that reveals some of the network dialogue would be:
python ftplib.py -d localhost -l -p -l
� N)�_GLOBAL_DEFAULT_TIMEOUT�FTP� error_reply�
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error_perm� error_proto�
all_errors� � i c @ s e Zd ZdS )�ErrorN)�__name__�
__module__� __qualname__� r r � /usr/lib64/python3.6/ftplib.pyr 9 s r c @ s e Zd ZdS )r N)r r
r r r r r r : s c @ s e Zd ZdS )r N)r r
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� Zd]dd�Zdd� Zdd� ZeZdd� Zdd� Zdd� Zdd � Zd d � Z d d � Z d!d"� Z d#d$� Z d%d&� Z d'd(� Z!d)d*� Z"d+d,� Z#d-d.� Z$d/d0� Z%d1d2� Z&d^d3d4�Z'd_d5d6�Z(d`d7d8�Z)dad:d;�Z*dbd<d=�Z+dcd>d?�Z,ddd@dA�Z-dBdC� Z.dDdE� Z/dFdG� Z0dg fdHdI�Z1dJdK� Z2dLdM� Z3dNdO� Z4dPdQ� Z5dRdS� Z6dTdU� Z7dVdW� Z8dXdY� Z9dZd[� Z:dS )er ay An FTP client class.
To create a connection, call the class using these arguments:
host, user, passwd, acct, timeout
The first four arguments are all strings, and have default value ''.
timeout must be numeric and defaults to None if not passed,
meaning that no timeout will be set on any ftp socket(s)
If a timeout is passed, then this is now the default timeout for all ftp
socket operations for this instance.
Then use self.connect() with optional host and port argument.
To download a file, use ftp.retrlines('RETR ' + filename),
or ftp.retrbinary() with slightly different arguments.
To upload a file, use ftp.storlines() or ftp.storbinary(),
which have an open file as argument (see their definitions
below for details).
The download/upload functions first issue appropriate TYPE
and PORT or PASV commands.
r � Nr zlatin-1Fc C s0 || _ || _|r,| j|� |r,| j|||� d S )N)�source_address�timeout�connect�login)�self�host�user�passwd�acctr r r r r �__init__r s
z FTP.__init__c C s | S )Nr )r r r r � __enter__{ s z
FTP.__enter__c G sN | j d k rJz*y | j� W n ttfk
r0 Y nX W d | j d k rH| j� X d S )N)�sock�quit�OSError�EOFError�close)r �argsr r r �__exit__ s
z FTP.__exit__i� c C s� |dkr|| _ |dkr || _|dkr*|| _|dk r8|| _tj| j | jf| j| jd�| _| jj| _| jj d| j
d�| _ | j � | _
| j
S ) aw Connect to host. Arguments are:
- host: hostname to connect to (string, default previous host)
- port: port to connect to (integer, default previous port)
- timeout: the timeout to set against the ftp socket(s)
- source_address: a 2-tuple (host, port) for the socket to bind
to as its source address before connecting.
r r i� N)r �r)�encodingi���)r �portr r �socket�create_connectionr Zfamily�af�makefiler% �file�getresp�welcome)r r r& r r r r r r � s
z FTP.connectc C s | j rtd| j| j�� | jS )z`Get the welcome message from the server.
(this is read and squirreled away by connect())z *welcome*)� debugging�print�sanitizer- )r r r r �
getwelcome� s zFTP.getwelcomec C s
|| _ dS )z�Set the debugging level.
The required argument level means:
0: no debugging output (default)
1: print commands and responses but not body text etc.
2: also print raw lines read and sent before stripping CR/LFN)r. )r �levelr r r �set_debuglevel� s zFTP.set_debuglevelc C s
|| _ dS )z�Use passive or active mode for data transfers.
With a false argument, use the normal PORT mode,
With a true argument, use the PASV command.N)�
passiveserver)r �valr r r �set_pasv� s z FTP.set_pasvc C sJ |d d� dkrBt |jd��}|d d� d|d ||d � }t|�S )N� �pass �PASS z
�*> r8 r9 )�len�rstrip�repr)r �s�ir r r r0 � s $z FTP.sanitizec C sR d|ksd|krt d��|t }| jdkr:td| j|�� | jj|j| j�� d S )N�
�
z4an illegal newline character should not be containedr z*put*) �
ValueError�CRLFr. r/ r0 r �sendall�encoder% )r �liner r r �putline� s
z FTP.putlinec C s$ | j rtd| j|�� | j|� d S )Nz*cmd*)r. r/ r0 rG )r rF r r r �putcmd� s z
FTP.putcmdc C s� | j j| jd �}t|�| jkr.td| j ��| jdkrHtd| j|�� |sPt�|dd � t krn|d d� }n |dd � t kr�|d d� }|S ) Nr zgot more than %d bytesz*get*� ���rJ ���rK )
r+ �readline�maxliner; r r. r/ r0 r rC )r rF r r r �getline� s
z FTP.getlinec C sd | j � }|dd� dkr`|d d� }x:| j � }|d| }|d d� |kr&|dd� dkr&P q&W |S )N� � �-rA )rN )r rF �codeZnextliner r r � getmultiline� s zFTP.getmultilinec C sp | j � }| jr td| j|�� |d d� | _|d d� }|d krD|S |dkrTt|��|dkrdt|��t|��d S )
Nz*resp*rO r �1�2�3�4�5> rT rV rU )rS r. r/ r0 Zlastrespr r r )r �resp�cr r r r, � s z FTP.getrespc C s$ | j � }|dd� dkr t|��|S )z%Expect a response beginning with '2'.Nr rU )r, r )r rY r r r �voidresp� s z FTP.voidrespc C sT dt }| jdkr"td| j|�� | jj|t� | j� }|dd� d krPt|��|S )
z�Abort a file transfer. Uses out-of-band data.
This does not follow the procedure from the RFC to send Telnet
IP and Synch; that doesn't seem to work with the servers I've
tried. Instead, just send the ABOR command as OOB data.s ABORr z *put urgent*NrO �426�225�226> r^ r\ r] ) �B_CRLFr. r/ r0 r rD �MSG_OOBrS r )r rF rY r r r �abort s
z FTP.abortc C s | j |� | j� S )z'Send a command and return the response.)rH r, )r �cmdr r r �sendcmd s
z FTP.sendcmdc C s | j |� | j� S )z8Send a command and expect a response beginning with '2'.)rH r[ )r rb r r r �voidcmd s
z FTP.voidcmdc C sB |j d�}t|d �t|d �g}|| }ddj|� }| j|�S )zUSend a PORT command with the current host and the given
port number.
�.� zPORT �,)�splitr= �joinrd )r r r& ZhbytesZpbytes�bytesrb r r r �sendport s
z FTP.sendportc C sb d}| j tjkrd}| j tjkr$d}|dkr4td��dt|�|t|�dg}ddj|� }| j|�S )zESend an EPRT command with the current host and the given port number.r r rI zunsupported address familyr zEPRT �|)r) r' �AF_INETZAF_INET6r r= ri rd )r r r& r) Zfieldsrb r r r �sendeprt$ s z FTP.sendeprtc
C s d}d}x�t jdd| jt jdt j�D ]j}|\}}}}}y t j |||�}|j|� W n8 tk
r� } z | }|rt|j� d}w$W Y dd} ~ X nX P q$W |dkr�|dk r�|�ntd��|jd� |j � d }
| j
j � d } | jt j kr�| j | |
�} n | j
| |
�} | jtk �r|j| j� |S )z3Create a new socket and send a PORT command for it.Nr z!getaddrinfo returns an empty listr )r' Z getaddrinfor) Z SOCK_STREAMZ
AI_PASSIVEZbindr r! ZlistenZ getsocknamer rm rk rn r r �
settimeout)
r �errr �resr) Zsocktype�protoZ canonnameZsa�_r& r rY r r r �makeport1 s6
z FTP.makeportc C s\ | j tjkr:t| jd��\}}| jr*|}qT| jj� d }nt| jd�| jj� �\}}||fS )z<Internal: Does the PASV or EPSV handshake -> (address, port)�PASVr ZEPSV) r) r' rm �parse227rc � trust_server_pasv_ipv4_addressr Z getpeername�parse229)r Zuntrusted_hostr& r r r r �makepasvQ s z FTP.makepasvc
C s6 d}| j r�| j� \}}tj||f| j| jd�}yL|dk rF| jd| � | j|�}|d dkrd| j� }|d dkrxt|��W n |j � � Y nX n�| j
� �r}|dk r�| jd| � | j|�}|d dkr�| j� }|d dkr�t|��|j � \}} | jt k �r
|j
| j� W dQ R X |dd� dk�r.t|�}||fS ) a� Initiate a transfer over the data connection.
If the transfer is active, send a port command and the
transfer command, and accept the connection. If the server is
passive, send a pasv command, connect to it, and start the
transfer command. Either way, return the socket for the
connection and the expected size of the transfer. The
expected size may be None if it could not be determined.
Optional `rest' argument can be a string that is sent as the
argument to a REST command. This is essentially a server
marker used to tell the server to skip over any data up to the
given marker.
N)r zREST %sr rU rT rO �150)r4 ry r' r( r r rc r, r r! rt Zacceptr ro �parse150)
r rb �rest�sizer r& �connrY r Zsockaddrr r r � ntransfercmd] s<
zFTP.ntransfercmdc C s | j ||�d S )z0Like ntransfercmd() but returns only the socket.r )r )r rb r| r r r � transfercmd� s zFTP.transfercmdc C s� |sd}|sd}|sd}|dkr0|d kr0|d }| j d| �}|d dkrX| j d| �}|d dkrr| j d | �}|d d
kr�t|��|S ) zLogin, default anonymous.Z anonymousr rQ z
anonymous@zUSER r rV zPASS zACCT rU > r rQ )rc r )r r r r rY r r r r � s z FTP.login� c
C sb | j d� | j||��>}x |j|�}|s*P ||� qW tdk rPt|t�rP|j� W dQ R X | j� S )a� Retrieve data in binary mode. A new port is created for you.
Args:
cmd: A RETR command.
callback: A single parameter callable to be called on each
block of data read.
blocksize: The maximum number of bytes to read from the
socket at one time. [default: 8192]
rest: Passed to transfercmd(). [default: None]
Returns:
The response code.
zTYPE IN)rd r� Zrecv�
_SSLSocket�
isinstance�unwrapr[ )r rb �callback� blocksizer| r~ �datar r r �
retrbinary� s
zFTP.retrbinaryc C s� |dkr t }| jd�}| j|���}|jd| jd���}x�|j| jd �}t|�| jkrbtd| j ��| j dkrzt
dt |�� |s�P |d
d� t kr�|dd � }n |d d� d kr�|dd
� }||� q6W t
dk r�t|t
�r�|j� W dQ R X W dQ R X | j� S )ah Retrieve data in line mode. A new port is created for you.
Args:
cmd: A RETR, LIST, or NLST command.
callback: An optional single parameter callable that is called
for each line with the trailing CRLF stripped.
[default: print_line()]
Returns:
The response code.
NzTYPE Ar$ )r% r zgot more than %d bytesrI z*retr*rA rJ rJ rK rK )�
print_linerc r� r* r% rL rM r; r r. r/ r= rC r� r� r� r[ )r rb r� rY r~ �fprF r r r � retrlines� s*
z
FTP.retrlinesc
C sp | j d� | j||��L}x*|j|�}|s*P |j|� |r||� qW tdk r^t|t�r^|j� W dQ R X | j� S )a9 Store a file in binary mode. A new port is created for you.
Args:
cmd: A STOR command.
fp: A file-like object with a read(num_bytes) method.
blocksize: The maximum data size to read from fp and send over
the connection at once. [default: 8192]
callback: An optional single parameter callable that is called on
each block of data after it is sent. [default: None]
rest: Passed to transfercmd(). [default: None]
Returns:
The response code.
zTYPE IN)rd r� �readrD r� r� r� r[ )r rb r� r� r� r| r~ �bufr r r �
storbinary� s
zFTP.storbinaryc
C s� | j d� | j|���}x||j| jd �}t|�| jkrDtd| j ��|sJP |dd� tkrz|d tkrr|dd� }|t }|j|� |r||� qW tdk r�t |t�r�|j
� W dQ R X | j � S ) ah Store a file in line mode. A new port is created for you.
Args:
cmd: A STOR command.
fp: A file-like object with a readline() method.
callback: An optional single parameter callable that is called on
each line after it is sent. [default: None]
Returns:
The response code.
zTYPE Ar zgot more than %d bytesrI NrJ rK rK ) rd r� rL rM r; r r_ rD r� r� r� r[ )r rb r� r� r~ r� r r r � storlines s$
z
FTP.storlinesc C s d| }| j |�S )zSend new account name.zACCT )rd )r Zpasswordrb r r r r + s zFTP.acctc G s4 d}x|D ]}|d| }q
W g }| j ||j� |S )zBReturn a list of files in a given directory (default the current).ZNLST� )r� �append)r r" rb �arg�filesr r r �nlst0 s
zFTP.nlstc G sl d}d}|dd� r>t |d �t d�kr>|dd� |d }}x |D ]}|rD|d| }qDW | j||� dS )
a List a directory in long form.
By default list current directory to stdout.
Optional last argument is callback function; all
non-empty arguments before it are concatenated to the
LIST command. (This *should* only be used for a pathname.)ZLISTNr r r� rK rK rK rK )�typer� )r r" rb �funcr� r r r �dir9 s
zFTP.dirc
c s� |r | j ddj|� d � |r*d| }nd}g }| j||j� xh|D ]`}|jt�jd�\}}}i } x6|dd � jd�D ] }
|
jd�\} }} | | | j� < qxW || fV qFW dS )
a< List a directory in a standardized format by using MLSD
command (RFC-3659). If path is omitted the current directory
is assumed. "facts" is a list of strings representing the type
of information desired (e.g. ["type", "size", "perm"]).
Return a generator object yielding a tuple of two elements
for every file found in path.
First element is the file name, the second one is a dictionary
including a variable number of "facts" depending on the server
and whether "facts" argument has been provided.
z
OPTS MLST �;zMLSD %sZMLSDr� Nr �=rK ) rc ri r� r� r< rC � partitionrh �lower)
r �pathZfactsrb �linesrF Z facts_foundrs �name�entryZfact�key�valuer r r �mlsdH s
zFTP.mlsdc C s0 | j d| �}|d dkr"t|��| jd| �S )zRename a file.zRNFR r rV zRNTO )rc r rd )r ZfromnameZtonamerY r r r �renamed s z
FTP.renamec C s. | j d| �}|dd� dkr"|S t|��dS )zDelete a file.zDELE NrO �250�200> r� r� )rc r )r �filenamerY r r r �deletek s z
FTP.deletec C sn |dkrPy
| j d�S tk
rL } z |jd dd� dkr<� W Y dd}~X q\X n |dkr\d}d | }| j |�S )
zChange to a directory.z..ZCDUPr NrO �500r re zCWD )rd r r" )r �dirname�msgrb r r r �cwds s
zFTP.cwdc C s: | j d| �}|dd� dkr6|dd� j� }t|�S dS )z Retrieve the size of a file.zSIZE NrO Z213)rc �strip�int)r r� rY r> r r r r} � s zFTP.sizec C s$ | j d| �}|jd�s dS t|�S )z+Make a directory, return its full pathname.zMKD �257r )rd �
startswith�parse257)r r� rY r r r �mkd� s
zFTP.mkdc C s | j d| �S )zRemove a directory.zRMD )rd )r r� r r r �rmd� s zFTP.rmdc C s | j d�}|jd�sdS t|�S )z!Return current working directory.ZPWDr� r )rd r� r� )r rY r r r �pwd� s
zFTP.pwdc C s | j d�}| j� |S )z Quit, and close the connection.ZQUIT)rd r! )r rY r r r r � s
zFTP.quitc C sD z | j }d| _ |dk r |j� W d| j}d| _|dk r>|j� X dS )z8Close the connection without assuming anything about it.N)r+ r! r )r r+ r r r r r! � s z FTP.close����)r r r� N)N)N)r r r )r� N)N)r� NN)N);r r
r �__doc__r. r �FTP_PORTr& �MAXLINErM r r+ r- r4 r% rw r r r r# r r1 r3 �debugr6 r0 rG rH rN rS r, r[ ra rc rd rk rn rt ry r r� r r� r� r� r� r r� r� r� r� r� r� r} r� r� r� r r! r r r r r J sl
7
#
c @ sn e Zd ZdZejZdddddddedf dd�Zddd�Z d d
� Z
d d � Z d
d� Z dd� Z
ddd�Zdd� ZdS )�FTP_TLSa� A FTP subclass which adds TLS support to FTP as described
in RFC-4217.
Connect as usual to port 21 implicitly securing the FTP control
connection before authenticating.
Securing the data connection requires user to explicitly ask
for it by calling prot_p() method.
Usage example:
>>> from ftplib import FTP_TLS
>>> ftps = FTP_TLS('ftp.python.org')
>>> ftps.login() # login anonymously previously securing control channel
'230 Guest login ok, access restrictions apply.'
>>> ftps.prot_p() # switch to secure data connection
'200 Protection level set to P'
>>> ftps.retrlines('LIST') # list directory content securely
total 9
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 .
drwxr-xr-x 8 root wheel 1024 Jan 3 1994 ..
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 bin
drwxr-xr-x 2 root wheel 1024 Jan 3 1994 etc
d-wxrwxr-x 2 ftp wheel 1024 Sep 5 13:43 incoming
drwxr-xr-x 2 root wheel 1024 Nov 17 1993 lib
drwxr-xr-x 6 1094 wheel 1024 Sep 13 19:07 pub
drwxr-xr-x 3 root wheel 1024 Jan 3 1994 usr
-rw-r--r-- 1 root root 312 Aug 1 1994 welcome.msg
'226 Transfer complete.'
>>> ftps.quit()
'221 Goodbye.'
>>>
r Nc
C s� |d k r|d k rt d��|d k r0|d k r0t d��|d k s@|d k rVdd l}
|
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t j | |||||| � d S )Nz4context and keyfile arguments are mutually exclusivez5context and certfile arguments are mutually exclusiver zAkeyfile and certfile are deprecated, use a custom context insteadrI )�certfile�keyfileF)
rB �warnings�warn�DeprecationWarningr� r� �sslZ_create_stdlib_context� ssl_version�context�_prot_pr r ) r r r r r r� r� r� r r r� r r r r � s" zFTP_TLS.__init__Tc C s, |r t | jtj� r | j� tj| |||�S )N)r� r r� � SSLSocket�authr r )r r r r Zsecurer r r r � s z
FTP_TLS.loginc C sf t | jtj�rtd��| jtjkr.| jd�}n
| jd�}| jj | j| j
d�| _| jj d| j d�| _
|S )z2Set up secure control connection by using TLS/SSL.zAlready using TLSzAUTH TLSzAUTH SSL)�server_hostnamer$ )�moder% )r� r r� r� rB r� �PROTOCOL_SSLv23rd r� � wrap_socketr r* r% r+ )r rY r r r r� � s
z FTP_TLS.authc C s0 t | jtj�std��| jd�}| jj� | _|S )z/Switch back to a clear-text control connection.z
not using TLSZCCC)r� r r� r� rB rd r� )r rY r r r �ccc s
z FTP_TLS.cccc C s | j d� | j d�}d| _|S )z Set up secure data connection.zPBSZ 0zPROT PT)rd r� )r rY r r r �prot_p s
zFTP_TLS.prot_pc C s | j d�}d| _|S )z"Set up clear text data connection.zPROT CF)rd r� )r rY r r r �prot_c s
zFTP_TLS.prot_cc C s2 t j| ||�\}}| jr*| jj|| jd�}||fS )N)r� )r r r� r� r� r )r rb r| r~ r} r r r r $ s
zFTP_TLS.ntransfercmdc C s8 dt }| jj|� | j� }|d d� dkr4t|��|S )Ns ABORrO r\ r] r^ > r\ r^ r] )r_ r rD rS r )r rF rY r r r ra + s z
FTP_TLS.abort)r r r T)N)r r
r r� r� r� r� r r r r� r� r� r� r ra r r r r r� � s
r� c C s\ | dd� dkrt | ��tdkr<ddl}|jd|j|jB �atj| �}|sNdS t|jd��S )z�Parse the '150' response for a RETR request.
Returns the expected transfer size or None; size is not guaranteed to
be present in the 150 message.
NrO rz r z150 .* \((\d+) bytes\)r ) r �_150_re�re�compile�
IGNORECASE�ASCII�matchr� �group)rY r� �mr r r r{ : s
r{ c C s� | dd� dkrt | ��tdkr6ddl}|jd|j�atj| �}|sLt| ��|j� }dj|dd� �}t |d �d> t |d � }||fS )
z�Parse the '227' response for a PASV request.
Raises error_proto if it does not contain '(h1,h2,h3,h4,p1,p2)'
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dg�ZReSedI��rejTZUnejVZUG dJd� d�ZWdKdL� ZXeYdMk�rFeX� dS )NaQ TELNET client class.
Based on RFC 854: TELNET Protocol Specification, by J. Postel and
J. Reynolds
Example:
>>> from telnetlib import Telnet
>>> tn = Telnet('www.python.org', 79) # connect to finger port
>>> tn.write(b'guido\r\n')
>>> print(tn.read_all())
Login Name TTY Idle When Where
guido Guido van Rossum pts/2 <Dec 2 11:10> snag.cnri.reston..
>>>
Note that read_all() won't read until eof -- it just reads some data
-- but it guarantees to read at least one byte unless EOF is hit.
It is possible to pass a Telnet object to a selector in order to wait until
more data is available. Note that in this case, read_eager() may return b''
even if there was data on the socket, because the protocol negotiation may have
eaten the data. This is why EOFError is needed in some cases to distinguish
between "no data" and "connection closed" (since the socket also appears ready
for reading when it is closed).
To do:
- option negotiation
- timeout should be intrinsic to the connection object instead of an
option on one of the read calls only
� N)� monotonic�Telnet� � � � � � �� �� �� �� �� � � � � � � � � � � � � � � � �
� � �
� � � � � � � � � � � � � � � � � � �! �" �# �$ �% �& �' �( �) �* �+ �, �- �. �/ �0 �1 � � � � PollSelectorc @ s e Zd ZdZddejfdd�Zdejfdd�Zdd � Zd
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dd� Zd<dd�Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� Zd&d'� Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� Z d2d3� Z d4d5� Z d=d6d7�Z d8d9� Z d:d;� Z!dS )>r a� Telnet interface class.
An instance of this class represents a connection to a telnet
server. The instance is initially not connected; the open()
method must be used to establish a connection. Alternatively, the
host name and optional port number can be passed to the
constructor, too.
Don't try to reopen an already connected instance.
This class has many read_*() methods. Note that some of them
raise EOFError when the end of the connection is read, because
they can return an empty string for other reasons. See the
individual doc strings.
read_until(expected, [timeout])
Read until the expected string has been seen, or a timeout is
hit (default is no timeout); may block.
read_all()
Read all data until EOF; may block.
read_some()
Read at least one byte or EOF; may block.
read_very_eager()
Read all data available already queued or on the socket,
without blocking.
read_eager()
Read either data already queued or some data available on the
socket, without blocking.
read_lazy()
Read all data in the raw queue (processing it first), without
doing any socket I/O.
read_very_lazy()
Reads all data in the cooked queue, without doing any socket
I/O.
read_sb_data()
Reads available data between SB ... SE sequence. Don't block.
set_option_negotiation_callback(callback)
Each time a telnet option is read on the input flow, this callback
(if set) is called with the following parameters :
callback(telnet socket, command, option)
option will be chr(0) when there is no option.
No other action is done afterwards by telnetlib.
Nr c C sh t | _|| _|| _|| _d| _d| _d| _d| _d| _ d| _
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r N)rS � TELNET_PORTrL rM rN �socketZcreate_connectionrO )rY rL rM rN rZ rZ r[ rX � s z Telnet.openc C s | j � dS )z#Destructor -- close the connection.N)�close)rY rZ rZ r[ �__del__� s zTelnet.__del__c G s@ | j dkr<td| j| jf dd� |r4t|| � nt|� dS )z�Print a debug message, when the debug level is > 0.
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N)rK )rY rK rZ rZ r[ �set_debuglevel� s zTelnet.set_debuglevelc C s. | j }d| _ d| _d| _d| _|r*|j� dS )zClose the connection.NTrI r )rO rS rT rU r_ )rY rO rZ rZ r[ r_ s z Telnet.closec C s | j S )z)Return the socket object used internally.)rO )rY rZ rZ r[ �
get_socket s zTelnet.get_socketc C s
| j j� S )z9Return the fileno() of the socket object used internally.)rO �fileno)rY rZ rZ r[ rh s z
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|�r�t dt | j�| �}| j � | j� | jj||�}|dkr�|| }| jd|� }| j|d� | _|S |dk rx|t� }|dk rxP qxW W dQ R X | j
� S )a Read until a given string is encountered or until timeout.
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W | j}d| _|S )z�Read at least one byte of cooked data unless EOF is hit.
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rI )ro rR rS rx )rY r} rZ rZ r[ � read_someS s zTelnet.read_somec C s6 | j � x$| j r,| j� r,| j� | j � q
W | j� S )a Read everything that's possible without blocking in I/O (eager).
Raise EOFError if connection closed and no cooked data
available. Return b'' if no cooked data available otherwise.
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sock_availrx ry )rY rZ rZ r[ �read_very_eagerb s
zTelnet.read_very_eagerc C s> | j � x,| j r4| j r4| j� r4| j� | j � q
W | j� S )z�Read readily available data.
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read_eagerp s
zTelnet.read_eagerc C s | j � | j� S )a Process and return data that's already in the queues (lazy).
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unless in the midst of an IAC sequence.
)ro ry )rY rZ rZ r[ � read_lazy~ s zTelnet.read_lazyc C s, | j }d| _ | r(| jr(| j r(td��|S )z�Return any data available in the cooked queue (very lazy).
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rI ztelnet connection closed)rR rS rP �EOFError)rY r} rZ rZ r[ ry � s
zTelnet.read_very_lazyc C s | j }d| _ |S )a Return any data available in the SB ... SE queue.
Return b'' if no SB ... SE available. Should only be called
after seeing a SB or SE command. When a new SB command is
found, old unread SB data will be discarded. Don't block.
rI )rV )rY r} rZ rZ r[ � read_sb_data� s zTelnet.read_sb_datac C s
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fkr�| j|7 _qd| _|tkr�|| j | || j< nh|t kr�d| _d| _ n&|t
kr�d| _| j |d | _ d|d< | j�r| j| j|t� n| jdt|� � qt| j�dkr| jdd� }d| _|}|ttfk�r�| jd|tk�rrd�ptd t|�� | j�r�| j| j||� n| jjtt
| � q|t t
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�r2 d| _d| _Y nX | j|d | _| j |d | _ d S )
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rI � r r zIAC %d not recognizedr z IAC %s %d�DO�DONT�WILL�WONTN)rP � rawq_getcharrT �theNULLri rU rn r� r� r� r� �SBrV �SErW rO �NOOPTrd �ordrk r� rR )rY r} �c�cmd�optrZ rZ r[ ro � sh zTelnet.process_rawqc C sZ | j s| j� | jrt�| j | j| jd � }| jd | _| jt| j �krVd| _ d| _|S )z�Get next char from raw queue.
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r rI r )rP rx rS r� rQ rn )rY r� rZ rZ r[ r� � s zTelnet.rawq_getcharc C sL | j t| j�kr d| _d| _ | jjd�}| jd|� | | _| j| | _dS )z�Fill raw queue from exactly one recv() system call.
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rI r �2 zrecv %rN)rQ rn rP rO Zrecvrd rS )rY r} rZ rZ r[ rx s zTelnet.fill_rawqc
C s. t � � }|j| tj� t|jd��S Q R X dS )z-Test whether data is available on the socket.r N)rr rs rt ru �boolrv )rY r rZ rZ r[ r� s zTelnet.sock_availc C s� t jdkr| j� dS t� ��}|j| tj� |jt jtj� x�x�|j� D ]�\}}|j | kr�y | j
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j� qH|j t jkrHt jj� jd�}|s�dS | j|� qHW q>W W dQ R X dS )z9Interaction function, emulates a very dumb telnet client.Zwin32Nz(*** Connection closed by remote host ***�ascii)�sys�platform� mt_interactrr rs rt ru �stdinrv Zfileobjr� r� rc �stdoutrm �decode�flush�readline�encode)rY r �keyZevents�text�linerZ rZ r[ �interact s,
zTelnet.interactc C s@ ddl }|j| jf � x$tjj� }|s(P | j|jd�� qW dS )z$Multithreaded version of interact().r Nr� )�_thread�start_new_thread�listenerr� r� r� rm r� )rY r� r� rZ rZ r[ r� 1 s
zTelnet.mt_interactc C sV xPy | j � }W n tk
r* td� dS X |rDtjj|jd�� qtjj� qW dS )z>Helper for mt_interact() -- this executes in the other thread.z(*** Connection closed by remote host ***Nr� )r� r� rc r� r� rm r� r� )rY �datarZ rZ r[ r� ; s zTelnet.listenerc C sP d}|dd� }t t|��}x8|D ]0}t|| d�s"|s@ddl}|j|| �||< q"W |dk rht� | }t� ��}|j| tj � x�| j
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fS )a� Read until one from a list of a regular expressions matches.
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first regular expression that matches; the match object
returned; and the text read up till and including the match.
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text is the text received so far (may be the empty string if a
timeout happened).
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N�searchr r ���)�rangern �hasattr�re�compilerq rr rs rt ru rS ro r� rR rb rv rx ry r� ) rY �listrN r� �indicesr| r~ r �m�er� ZreadyrZ rZ r[ �expectH sB
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zContext._regard_flagsc C s t | j| j d �S )Nr- )rT r! r? )r. r' r' r) r� s z
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kr`| jtd�S |j | �S )NrQ zAtrailing or leading whitespace and underscores are not permitted.)r/ z diagnostic info too long in NaN) r^ r_ ra rc r r r� re r7 r? r� r� )r. rA r~ r' r' r) �create_decimal# s zContext.create_decimalc C s t j|�}|j| �S )N)r rp r� )r. r} r~ r' r' r) �create_decimal_from_float4 s
z!Context.create_decimal_from_floatc C s t |dd�}|j| d�S )NT)r� )r/ )r� r� )r. r r' r' r) rg F s z Context.absc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S d S )NT)r� )r/ z Unable to convert %s to Decimal)r� r� r� rq )r. r rR r� r' r' r) �add[ s
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zContext.copy_absc C s t |dd�}t|�S )NT)r� )r� r )r. r r' r' r) � copy_decimal� s
zContext.copy_decimalc C s t |dd�}|j� S )NT)r� )r� r� )r. r r' r' r) r� s
zContext.copy_negatec C s t |dd�}|j|�S )NT)r� )r� r7 )r. r rR r' r' r) r7 s zContext.copy_signc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S d S )NT)r� )r/ z Unable to convert %s to Decimal)r� r� r� rq )r. r rR r� r' r' r) �divide+ s
zContext.dividec C s8 t |dd�}|j|| d�}|tkr0td| ��n|S d S )NT)r� )r/ z Unable to convert %s to Decimal)r� r� r� rq )r. r rR r� r' r' r) �
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zContext.divmodc C s t |dd�}|j| d�S )NT)r� )r/ )r� rU )r. r r' r' r) rU | s z Context.expc C s t |dd�}|j||| d�S )NT)r� )r/ )r� r� )r. r rR r* r' r' r) r� � s z Context.fmac C s t |t�std��|j� S )Nz/is_canonical requires a Decimal as an argument.)r^ r rq r: )r. r r' r' r) r: � s
zContext.is_canonicalc C s t |dd�}|j� S )NT)r� )r� r; )r. r r' r' r) r; � s zContext.is_finitec C s t |dd�}|j� S )NT)r� )r� r" )r. r r' r' r) r" � s zContext.is_infinitec C s t |dd�}|j� S )NT)r� )r� r� )r. r r' r' r) r� � s
zContext.is_nanc C s t |dd�}|j| d�S )NT)r� )r/ )r� r< )r. r r' r' r) r< � s zContext.is_normalc C s t |dd�}|j� S )NT)r� )r� r� )r. r r' r' r) r� s zContext.is_qnanc C s t |dd�}|j� S )NT)r� )r� r= )r. r r' r' r) r= s zContext.is_signedc C s t |dd�}|j� S )NT)r� )r� r� )r. r r' r' r) r� $ s
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zContext.multiplyc C s t |dd�}|j| d�S )NT)r� )r/ )r� r] )r. r r' r' r) r] � s zContext.next_minusc C s t |dd�}|j| d�S )NT)r� )r/ )r� r^ )r. r r' r' r) r^ � s zContext.next_plusc C s t |dd�}|j|| d�S )NT)r� )r/ )r� r_ )r. r rR r' r' r) r_ � s zContext.next_towardc C s t |dd�}|j| d�S )NT)r� )r/ )r� r )r. r r' r' r) r � s zContext.normalizec C s t |dd�}|j| d�S )NT)r� )r/ )r� ra )r. r r' r' r) ra � s / zContext.number_classc C s t |dd�}|j| d�S )NT)r� )r/ )r� r� )r. r r' r' r) �plus) s z Context.plusc C s: t |dd�}|j||| d�}|tkr2td| ��n|S d S )NT)r� )r/ z Unable to convert %s to Decimal)r� r r� rq )r. r rR r� r� r' r' r) �power: s
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class. Depending on the version of Python you're using, there may be a
faster one available. You should always import the `local` class from
`threading`.)
Thread-local objects support the management of thread-local data.
If you have data that you want to be local to a thread, simply create
a thread-local object and use its attributes:
>>> mydata = local()
>>> mydata.number = 42
>>> mydata.number
42
You can also access the local-object's dictionary:
>>> mydata.__dict__
{'number': 42}
>>> mydata.__dict__.setdefault('widgets', [])
[]
>>> mydata.widgets
[]
What's important about thread-local objects is that their data are
local to a thread. If we access the data in a different thread:
>>> log = []
>>> def f():
... items = sorted(mydata.__dict__.items())
... log.append(items)
... mydata.number = 11
... log.append(mydata.number)
>>> import threading
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
>>> log
[[], 11]
we get different data. Furthermore, changes made in the other thread
don't affect data seen in this thread:
>>> mydata.number
42
Of course, values you get from a local object, including a __dict__
attribute, are for whatever thread was current at the time the
attribute was read. For that reason, you generally don't want to save
these values across threads, as they apply only to the thread they
came from.
You can create custom local objects by subclassing the local class:
>>> class MyLocal(local):
... number = 2
... def __init__(self, **kw):
... self.__dict__.update(kw)
... def squared(self):
... return self.number ** 2
This can be useful to support default values, methods and
initialization. Note that if you define an __init__ method, it will be
called each time the local object is used in a separate thread. This
is necessary to initialize each thread's dictionary.
Now if we create a local object:
>>> mydata = MyLocal(color='red')
Now we have a default number:
>>> mydata.number
2
an initial color:
>>> mydata.color
'red'
>>> del mydata.color
And a method that operates on the data:
>>> mydata.squared()
4
As before, we can access the data in a separate thread:
>>> log = []
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
>>> log
[[('color', 'red')], 11]
without affecting this thread's data:
>>> mydata.number
2
>>> mydata.color
Traceback (most recent call last):
...
AttributeError: 'MyLocal' object has no attribute 'color'
Note that subclasses can define slots, but they are not thread
local. They are shared across threads:
>>> class MyLocal(local):
... __slots__ = 'number'
>>> mydata = MyLocal()
>>> mydata.number = 42
>>> mydata.color = 'red'
So, the separate thread:
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
affects what we see:
>>> mydata.number
11
>>> del mydata
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�r6 Y nX ed(k�rVd#d lZeej� � d S )+a� Heap queue algorithm (a.k.a. priority queue).
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heap = [] # creates an empty heap
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item = heap[0] # smallest item on the heap without popping it
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item = heapreplace(heap, item) # pops and returns smallest item, and adds
# new item; the heap size is unchanged
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- We use 0-based indexing. This makes the relationship between the
index for a node and the indexes for its children slightly less
obvious, but is more suitable since Python uses 0-based indexing.
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without surprises: heap[0] is the smallest item, and heap.sort()
maintains the heap invariant!
uo Heap queues
[explanation by François Pinard]
Heaps are arrays for which a[k] <= a[2*k+1] and a[k] <= a[2*k+2] for
all k, counting elements from 0. For the sake of comparison,
non-existing elements are considered to be infinite. The interesting
property of a heap is that a[0] is always its smallest element.
The strange invariant above is meant to be an efficient memory
representation for a tournament. The numbers below are `k', not a[k]:
0
1 2
3 4 5 6
7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
In the tree above, each cell `k' is topping `2*k+1' and `2*k+2'. In
a usual binary tournament we see in sports, each cell is the winner
over the two cells it tops, and we can trace the winner down the tree
to see all opponents s/he had. However, in many computer applications
of such tournaments, we do not need to trace the history of a winner.
To be more memory efficient, when a winner is promoted, we try to
replace it by something else at a lower level, and the rule becomes
that a cell and the two cells it tops contain three different items,
but the top cell "wins" over the two topped cells.
If this heap invariant is protected at all time, index 0 is clearly
the overall winner. The simplest algorithmic way to remove it and
find the "next" winner is to move some loser (let's say cell 30 in the
diagram above) into the 0 position, and then percolate this new 0 down
the tree, exchanging values, until the invariant is re-established.
This is clearly logarithmic on the total number of items in the tree.
By iterating over all items, you get an O(n ln n) sort.
A nice feature of this sort is that you can efficiently insert new
items while the sort is going on, provided that the inserted items are
not "better" than the last 0'th element you extracted. This is
especially useful in simulation contexts, where the tree holds all
incoming events, and the "win" condition means the smallest scheduled
time. When an event schedule other events for execution, they are
scheduled into the future, so they can easily go into the heap. So, a
heap is a good structure for implementing schedulers (this is what I
used for my MIDI sequencer :-).
Various structures for implementing schedulers have been extensively
studied, and heaps are good for this, as they are reasonably speedy,
the speed is almost constant, and the worst case is not much different
than the average case. However, there are other representations which
are more efficient overall, yet the worst cases might be terrible.
Heaps are also very useful in big disk sorts. You most probably all
know that a big sort implies producing "runs" (which are pre-sorted
sequences, which size is usually related to the amount of CPU memory),
followed by a merging passes for these runs, which merging is often
very cleverly organised[1]. It is very important that the initial
sort produces the longest runs possible. Tournaments are a good way
to that. If, using all the memory available to hold a tournament, you
replace and percolate items that happen to fit the current run, you'll
produce runs which are twice the size of the memory for random input,
and much better for input fuzzily ordered.
Moreover, if you output the 0'th item on disk and get an input which
may not fit in the current tournament (because the value "wins" over
the last output value), it cannot fit in the heap, so the size of the
heap decreases. The freed memory could be cleverly reused immediately
for progressively building a second heap, which grows at exactly the
same rate the first heap is melting. When the first heap completely
vanishes, you switch heaps and start a new run. Clever and quite
effective!
In a word, heaps are useful memory structures to know. I use them in
a few applications, and I think it is good to keep a `heap' module
around. :-)
--------------------
[1] The disk balancing algorithms which are current, nowadays, are
more annoying than clever, and this is a consequence of the seeking
capabilities of the disks. On devices which cannot seek, like big
tape drives, the story was quite different, and one had to be very
clever to ensure (far in advance) that each tape movement will be the
most effective possible (that is, will best participate at
"progressing" the merge). Some tapes were even able to read
backwards, and this was also used to avoid the rewinding time.
Believe me, real good tape sorts were quite spectacular to watch!
From all times, sorting has always been a Great Art! :-)
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This is an implementation of decimal floating point arithmetic based on
the General Decimal Arithmetic Specification:
http://speleotrove.com/decimal/decarith.html
and IEEE standard 854-1987:
http://en.wikipedia.org/wiki/IEEE_854-1987
Decimal floating point has finite precision with arbitrarily large bounds.
The purpose of this module is to support arithmetic using familiar
"schoolhouse" rules and to avoid some of the tricky representation
issues associated with binary floating point. The package is especially
useful for financial applications or for contexts where users have
expectations that are at odds with binary floating point (for instance,
in binary floating point, 1.00 % 0.1 gives 0.09999999999999995 instead
of 0.0; Decimal('1.00') % Decimal('0.1') returns the expected
Decimal('0.00')).
Here are some examples of using the decimal module:
>>> from decimal import *
>>> setcontext(ExtendedContext)
>>> Decimal(0)
Decimal('0')
>>> Decimal('1')
Decimal('1')
>>> Decimal('-.0123')
Decimal('-0.0123')
>>> Decimal(123456)
Decimal('123456')
>>> Decimal('123.45e12345678')
Decimal('1.2345E+12345680')
>>> Decimal('1.33') + Decimal('1.27')
Decimal('2.60')
>>> Decimal('12.34') + Decimal('3.87') - Decimal('18.41')
Decimal('-2.20')
>>> dig = Decimal(1)
>>> print(dig / Decimal(3))
0.333333333
>>> getcontext().prec = 18
>>> print(dig / Decimal(3))
0.333333333333333333
>>> print(dig.sqrt())
1
>>> print(Decimal(3).sqrt())
1.73205080756887729
>>> print(Decimal(3) ** 123)
4.85192780976896427E+58
>>> inf = Decimal(1) / Decimal(0)
>>> print(inf)
Infinity
>>> neginf = Decimal(-1) / Decimal(0)
>>> print(neginf)
-Infinity
>>> print(neginf + inf)
NaN
>>> print(neginf * inf)
-Infinity
>>> print(dig / 0)
Infinity
>>> getcontext().traps[DivisionByZero] = 1
>>> print(dig / 0)
Traceback (most recent call last):
...
...
...
decimal.DivisionByZero: x / 0
>>> c = Context()
>>> c.traps[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.divide(Decimal(0), Decimal(0))
Decimal('NaN')
>>> c.traps[InvalidOperation] = 1
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> print(c.divide(Decimal(0), Decimal(0)))
Traceback (most recent call last):
...
...
...
decimal.InvalidOperation: 0 / 0
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> c.traps[InvalidOperation] = 0
>>> print(c.divide(Decimal(0), Decimal(0)))
NaN
>>> print(c.flags[InvalidOperation])
1
>>>
�Decimal�Context� DecimalTuple�DefaultContext� BasicContext�ExtendedContext�DecimalException�Clamped�InvalidOperation�DivisionByZero�Inexact�Rounded� Subnormal�Overflow� Underflow�FloatOperation�DivisionImpossible�InvalidContext�ConversionSyntax�DivisionUndefined�
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called if the others are present. This isn't actually used for
anything, though.
handle -- Called when context._raise_error is called and the
trap_enabler is not set. First argument is self, second is the
context. More arguments can be given, those being after
the explanation in _raise_error (For example,
context._raise_error(NewError, '(-x)!', self._sign) would
call NewError().handle(context, self._sign).)
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c G s d S )Nr' )�self�contextr( r' r' r) �handle� s zDecimalException.handleN)�__name__�
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This occurs and signals clamped if the exponent of a result has been
altered in order to fit the constraints of a specific concrete
representation. This may occur when the exponent of a zero result would
be outside the bounds of a representation, or when a large normal
number would have an encoded exponent that cannot be represented. In
this latter case, the exponent is reduced to fit and the corresponding
number of zero digits are appended to the coefficient ("fold-down").
N)r1 r2 r3 r4 r' r' r' r) r � s
c @ s e Zd ZdZdd� ZdS )r a0 An invalid operation was performed.
Various bad things cause this:
Something creates a signaling NaN
-INF + INF
0 * (+-)INF
(+-)INF / (+-)INF
x % 0
(+-)INF % x
x._rescale( non-integer )
sqrt(-x) , x > 0
0 ** 0
x ** (non-integer)
x ** (+-)INF
An operand is invalid
The result of the operation after these is a quiet positive NaN,
except when the cause is a signaling NaN, in which case the result is
also a quiet NaN, but with the original sign, and an optional
diagnostic information.
c G s, |r(t |d j|d jdd�}|j|�S tS )Nr% �nT)�_dec_from_triple�_sign�_int�_fix_nan�_NaN)r. r/ r( �ansr' r' r) r0 � s
zInvalidOperation.handleN)r1 r2 r3 r4 r0 r' r' r' r) r � s c @ s e Zd ZdZdd� ZdS )r z�Trying to convert badly formed string.
This occurs and signals invalid-operation if a string is being
converted to a number and it does not conform to the numeric string
syntax. The result is [0,qNaN].
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a� Division by 0.
This occurs and signals division-by-zero if division of a finite number
by zero was attempted (during a divide-integer or divide operation, or a
power operation with negative right-hand operand), and the dividend was
not zero.
The result of the operation is [sign,inf], where sign is the exclusive
or of the signs of the operands for divide, or is 1 for an odd power of
-0, for power.
c G s t | S )N)�_SignedInfinity)r. r/ �signr( r' r' r) r0 s zDivisionByZero.handleN)r1 r2 r3 r4 r0 r' r' r' r) r
s c @ s e Zd ZdZdd� ZdS )r z�Cannot perform the division adequately.
This occurs and signals invalid-operation if the integer result of a
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longer than precision). The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 s zDivisionImpossible.handleN)r1 r2 r3 r4 r0 r' r' r' r) r s c @ s e Zd ZdZdd� ZdS )r z�Undefined result of division.
This occurs and signals invalid-operation if division by zero was
attempted (during a divide-integer, divide, or remainder operation), and
the dividend is also zero. The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 ) s zDivisionUndefined.handleN)r1 r2 r3 r4 r0 r' r' r' r) r ! s c @ s e Zd ZdZdS )r a� Had to round, losing information.
This occurs and signals inexact whenever the result of an operation is
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were non-zero), or if an overflow or underflow condition occurs. The
result in all cases is unchanged.
The inexact signal may be tested (or trapped) to determine if a given
operation (or sequence of operations) was inexact.
N)r1 r2 r3 r4 r' r' r' r) r , s
c @ s e Zd ZdZdd� ZdS )r a� Invalid context. Unknown rounding, for example.
This occurs and signals invalid-operation if an invalid context was
detected during an operation. This can occur if contexts are not checked
on creation and either the precision exceeds the capability of the
underlying concrete representation or an unknown or unsupported rounding
was specified. These aspects of the context need only be checked when
the values are required to be used. The result is [0,qNaN].
c G s t S )N)r: )r. r/ r( r' r' r) r0 C s zInvalidContext.handleN)r1 r2 r3 r4 r0 r' r' r' r) r 8 s c @ s e Zd ZdZdS )r a� Number got rounded (not necessarily changed during rounding).
This occurs and signals rounded whenever the result of an operation is
rounded (that is, some zero or non-zero digits were discarded from the
coefficient), or if an overflow or underflow condition occurs. The
result in all cases is unchanged.
The rounded signal may be tested (or trapped) to determine if a given
operation (or sequence of operations) caused a loss of precision.
N)r1 r2 r3 r4 r' r' r' r) r F s
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a� Exponent < Emin before rounding.
This occurs and signals subnormal whenever the result of a conversion or
operation is subnormal (that is, its adjusted exponent is less than
Emin, before any rounding). The result in all cases is unchanged.
The subnormal signal may be tested (or trapped) to determine if a given
or operation (or sequence of operations) yielded a subnormal result.
N)r1 r2 r3 r4 r' r' r' r) r
R s c @ s e Zd ZdZdd� ZdS )r a Numerical overflow.
This occurs and signals overflow if the adjusted exponent of a result
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by zero), after rounding, would be greater than the largest value that
can be handled by the implementation (the value Emax).
The result depends on the rounding mode:
For round-half-up and round-half-even (and for round-half-down and
round-up, if implemented), the result of the operation is [sign,inf],
where sign is the sign of the intermediate result. For round-down, the
result is the largest finite number that can be represented in the
current precision, with the sign of the intermediate result. For
round-ceiling, the result is the same as for round-down if the sign of
the intermediate result is 1, or is [0,inf] otherwise. For round-floor,
the result is the same as for round-down if the sign of the intermediate
result is 0, or is [1,inf] otherwise. In all cases, Inexact and Rounded
will also be raised.
c G s� |j ttttfkrt| S |dkrR|j tkr4t| S t|d|j |j |j d �S |dkr�|j t
krlt| S t|d|j |j |j d �S d S )Nr% �9r- ) �roundingr r r r r< r r6 �prec�Emaxr )r. r/ r= r( r' r' r) r0 s s
zOverflow.handleN)r1 r2 r3 r4 r0 r' r' r' r) r ] s c @ s e Zd ZdZdS )r ax Numerical underflow with result rounded to 0.
This occurs and signals underflow if a result is inexact and the
adjusted exponent of the result would be smaller (more negative) than
the smallest value that can be handled by the implementation (the value
Emin). That is, the result is both inexact and subnormal.
The result after an underflow will be a subnormal number rounded, if
necessary, so that its exponent is not less than Etiny. This may result
in 0 with the sign of the intermediate result and an exponent of Etiny.
In all cases, Inexact, Rounded, and Subnormal will also be raised.
N)r1 r2 r3 r4 r' r' r' r) r � s
c @ s e Zd ZdZdS )r a� Enable stricter semantics for mixing floats and Decimals.
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permitted in the Decimal() constructor, context.create_decimal() and
all comparison operators. Both conversion and comparisons are exact.
Any occurrence of a mixed operation is silently recorded by setting
FloatOperation in the context flags. Explicit conversions with
Decimal.from_float() or context.create_decimal_from_float() do not
set the flag.
Otherwise (the signal is trapped), only equality comparisons and explicit
conversions are silent. All other mixed operations raise FloatOperation.
N)r1 r2 r3 r4 r' r' r' r) r � s
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|j t S )N)�modules� __xname__)r. �sysr' r' r) �local� s zMockThreading.localN)r1 r2 r3 rE rF r' r' r' r) rB � s rB �__decimal_context__c C s, | t ttfkr | j� } | j� | tj� _dS )z%Set this thread's context to context.N)r r r �copy� clear_flags� threading�current_threadrG )r/ r' r' r) r � s c C s4 y
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r& t� }|| _ |S X dS )z�Returns this thread's context.
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N)rG rL r )�_localr/ r' r' r) r � s c C s( | t ttfkr | j� } | j� | |_dS )z%Set this thread's context to context.N)r r r rH rI rG )r/ rM r' r' r) r � s c C s | dkrt � } t| �S )ab Return a context manager for a copy of the supplied context
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in a with statement:
def sin(x):
with localcontext() as ctx:
ctx.prec += 2
# Rest of sin calculation algorithm
# uses a precision 2 greater than normal
return +s # Convert result to normal precision
def sin(x):
with localcontext(ExtendedContext):
# Rest of sin calculation algorithm
# uses the Extended Context from the
# General Decimal Arithmetic Specification
return +s # Convert result to normal context
>>> setcontext(DefaultContext)
>>> print(getcontext().prec)
28
>>> with localcontext():
... ctx = getcontext()
... ctx.prec += 2
... print(ctx.prec)
...
30
>>> with localcontext(ExtendedContext):
... print(getcontext().prec)
...
9
>>> print(getcontext().prec)
28
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Decimal('3.14')
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Decimal('3.14')
>>> Decimal(314) # int
Decimal('314')
>>> Decimal(Decimal(314)) # another decimal instance
Decimal('314')
>>> Decimal(' 3.14 \n') # leading and trailing whitespace okay
Decimal('3.14')
�_� Nz Invalid literal for Decimal: %rr= �-r- r% �intZfrac�exprQ F�diag�signal�Nr5 �FT� ztInvalid tuple size in creation of Decimal from list or tuple. The list or tuple should have exactly three elements.z|Invalid sign. The first value in the tuple should be an integer; either 0 for a positive number or 1 for a negative number.r+ � zTThe second value in the tuple must be composed of integers in the range 0 through 9.zUThe third value in the tuple must be an integer, or one of the strings 'F', 'n', 'N'.z;strict semantics for mixing floats and Decimals are enabledz Cannot convert %r to Decimal)r% r- )r5 rY )!�object�__new__�
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value is stored as the nearest representable value which is
0x1.999999999999ap-4. The exact equivalent of the value in decimal
is 0.1000000000000000055511151231257827021181583404541015625.
>>> Decimal.from_float(0.1)
Decimal('0.1000000000000000055511151231257827021181583404541015625')
>>> Decimal.from_float(float('nan'))
Decimal('NaN')
>>> Decimal.from_float(float('inf'))
Decimal('Infinity')
>>> Decimal.from_float(-float('inf'))
Decimal('-Infinity')
>>> Decimal.from_float(-0.0)
Decimal('-0')
z argument must be int or float.g �?r% r- � N)r_ rU rp rr �_mathZisinfZisnan�reprZcopysignrh �as_integer_ratio�
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zDecimal.from_floatc C s( | j r$| j}|dkrdS |dkr$dS dS )zrReturns whether the number is not actually one.
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r5 r- rY r+ r% )rP rO )r. rV r' r' r) �_isnan� s zDecimal._isnanc C s | j dkr| jrdS dS dS )zyReturns whether the number is infinite
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zDecimal._isinfinityc C s| | j � }|dkrd}n|j � }|s&|rx|dkr4t� }|dkrJ|jtd| �S |dkr`|jtd|�S |rn| j|�S |j|�S dS )z�Returns whether the number is not actually one.
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compare_signal, __le__, __lt__, __ge__, __gt__.
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or signaling) NaN. Signaling NaNs take precedence over quiet
NaNs.
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Nzcomparison involving sNaNzcomparison involving NaNr% )r rP �is_snanrd r �is_qnan)r. r� r/ r' r' r) �_compare_check_nans. s( zDecimal._compare_check_nansc C s | j p| jdkS )zuReturn True if self is nonzero; otherwise return False.
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rQ )rP r8 )r. r' r' r) �__bool__O s zDecimal.__bool__c C s | j s |j r8| j� }|j� }||kr(dS ||k r4dS dS | sP|sDdS d|j S |s^d| j S |j| jk rndS | j|jk r~dS | j� }|j� }||k� r�| jd| j|j }|jd|j| j }||kr�dS ||k r�d | j S d
| j S n ||k�rd | j S d | j S dS )
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z Decimal._cmpc C s< t | |dd�\} }|tkr |S | j||�r.dS | j|�dkS )NT)� equality_opFr% )�_convert_for_comparison�NotImplementedr� r� )r. r� r/ r' r' r) �__eq__� s zDecimal.__eq__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dk S )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__lt__� s zDecimal.__lt__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__le__� s zDecimal.__le__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__gt__� s zDecimal.__gt__c C s< t | |�\} }|tkr|S | j||�}|r.dS | j|�dkS )NFr% )r� r� r� r� )r. r� r/ r; r' r' r) �__ge__� s zDecimal.__ge__c C s> t |dd�}| js |r0|jr0| j||�}|r0|S t| j|��S )z�Compare self to other. Return a decimal value:
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T)�raiseit)�_convert_otherrP r� r r� )r. r� r/ r; r' r' r) �compare� s zDecimal.comparec C s� | j r4| j� rtd��n | j� r$tS | jr0t S tS | jdkrNtd| jt �}ntt
| j t �}t | j �| t }| dkr||n| }|dkr�dS |S )zx.__hash__() <==> hash(x)z"Cannot hash a signaling NaN value.r% �
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)r r7 rk ro rU r8 rO )r. r' r' r) �as_tuple� s zDecimal.as_tuplec C s� | j r | j� rtd��ntd��| s(dS t| j�}| jdkrR|d| j d }}nr| j }x(|dkr�|d dkr�|d }|d8 }q\W | j }t|| @ j� d |�}|r�||L }||8 }d| |> }| j r�| }||fS )a� Express a finite Decimal instance in the form n / d.
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or NaN, raises OverflowError or ValueError respectively.
>>> Decimal('3.14').as_integer_ratio()
(157, 50)
>>> Decimal('-123e5').as_integer_ratio()
(-12300000, 1)
>>> Decimal('0.00').as_integer_ratio()
(0, 1)
z#cannot convert NaN to integer ratioz(cannot convert Infinity to integer ratior% r- r� ry )r% r- )
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rS rT rZ ZInfinityr5 �NaNr� r% � r- rQ r[ �.N�e�Ez%+di����)r7 rP rO r8 rf r �capitals) r. �engr/ r= �
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zDecimal.__str__c C s | j d|d�S )a, Convert to a string, using engineering notation if an exponent is needed.
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require the addition of either one or two trailing zeros.
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)r/ N)rP r� r r? r �copy_abs� copy_negate�_fix)r. r/ r; r' r' r) �__neg__i s
zDecimal.__neg__c C sT | j r| j|d�}|r|S |dkr(t� }| rB|jtkrB| j� }nt| �}|j|�S )zhReturns a copy, unless it is a sNaN.
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)r/ N)rP r� r r? r r� r r� )r. r/ r; r' r' r) �__pos__ s
zDecimal.__pos__Tc C sJ |s | j � S | jr&| j|d�}|r&|S | jr:| j|d�}n | j|d�}|S )z�Returns the absolute value of self.
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expression self.__abs__(round=False) is equivalent to
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instance self to the nearest integer. If self is infinite or
a NaN then a Python exception is raised. If self is finite
and lies exactly halfway between two integers then it is
rounded to the integer with even last digit.
>>> round(Decimal('123.456'))
123
>>> round(Decimal('-456.789'))
-457
>>> round(Decimal('-3.0'))
-3
>>> round(Decimal('2.5'))
2
>>> round(Decimal('3.5'))
4
>>> round(Decimal('Inf'))
Traceback (most recent call last):
...
OverflowError: cannot round an infinity
>>> round(Decimal('NaN'))
Traceback (most recent call last):
...
ValueError: cannot round a NaN
If a second argument n is supplied, self is rounded to n
decimal places using the rounding mode for the current
context.
For an integer n, round(self, -n) is exactly equivalent to
self.quantize(Decimal('1En')).
>>> round(Decimal('123.456'), 0)
Decimal('123')
>>> round(Decimal('123.456'), 2)
Decimal('123.46')
>>> round(Decimal('123.456'), -2)
Decimal('1E+2')
>>> round(Decimal('-Infinity'), 37)
Decimal('NaN')
>>> round(Decimal('sNaN123'), 0)
Decimal('NaN123')
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where p is the context precision.
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k�r�|| k�r�|jt� |jt� |j|�}|S )
z�Quantize self so its exponent is the same as that of exp.
Similar to self._rescale(exp._exp) but with error checking.
T)r� Nzquantize with one INFz)target exponent out of bounds in quantizerQ z9exponent of quantize result too large for current contextr- z7quantize result has too many digits for current context)r� r r? rP r� r� r rd r r� rO rA r6 r7 r� r� r@ r� rf r8 �Eminr
r r )r. rV r? r/ r; r� r' r' r) r�
sT
zDecimal.quantizec C sD t |dd�}| js|jr8| j� r(|j� p6| j� o6|j� S | j|jkS )a= Return True if self and other have the same exponent; otherwise
return False.
If either operand is a special value, the following rules are used:
* return True if both operands are infinities
* return True if both operands are NaNs
* otherwise, return False.
T)r� )r� rP r� � is_infiniterO )r. r� r/ r' r' r) � same_quantumJ
s
zDecimal.same_quantumc C s� | j rt| �S | s t| jd|�S | j|krHt| j| jd| j| |�S t| j�| j | }|dk rzt| jd|d �} d}| j| }|| |�}| jd|� p�d}|dkr�tt |�d �}t| j||�S )as Rescale self so that the exponent is exp, either by padding with zeros
or by truncating digits, using the given rounding mode.
Specials are returned without change. This operation is
quiet: it raises no flags, and uses no information from the
context.
exp = exp to scale to (an integer)
rounding = rounding mode
rQ r% r� r- N)
rP r r6 r7 rO r8 rf r� r` rU )r. rV r? rx Z
this_functionr� r� r' r' r) r� Y
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zDecimal._rescalec C sh |dkrt d��| js | r$t| �S | j| j� d | |�}|j� | j� krd|j|j� d | |�}|S )a" Round a nonzero, nonspecial Decimal to a fixed number of
significant figures, using the given rounding mode.
Infinities, NaNs and zeros are returned unaltered.
This operation is quiet: it raises no flags, and uses no
information from the context.
r% z'argument should be at least 1 in _roundr- )rl rP r r� r� )r. �placesr? r; r' r' r) �_round{
s
zDecimal._roundc C s� | j r"| j|d�}|r|S t| �S | jdkr4t| �S | sFt| jdd�S |dkrTt� }|dkrb|j}| jd|�}|| kr�|j t
� |j t � |S )aV Rounds to a nearby integer.
If no rounding mode is specified, take the rounding mode from
the context. This method raises the Rounded and Inexact flags
when appropriate.
See also: to_integral_value, which does exactly the same as
this method except that it doesn't raise Inexact or Rounded.
)r/ r% rQ N) rP r� r rO r6 r7 r r? r� rd r r )r. r? r/ r; r' r' r) �to_integral_exact�
s$
zDecimal.to_integral_exactc C s` |dkrt � }|dkr |j}| jr>| j|d�}|r6|S t| �S | jdkrPt| �S | jd|�S dS )z@Rounds to the nearest integer, without raising inexact, rounded.N)r/ r% )r r? rP r� r rO r� )r. r? r/ r; r' r' r) r� �
s
zDecimal.to_integral_valuec C s� |dkrt � }| jrB| j|d�}|r(|S | j� rB| jdkrBt| �S | sdt| jd| jd �}|j|�S | jdkrz|j t
d�S |j d }t | �}|j
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d@ r�|jd }t| j�d? d }n|j}t| j�d d? }|| }|dkr�|d | 9 }d
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|_|S ) z Return the square root of self.N)r/ r% rQ r+ r- zsqrt(-x), x > 0r� r Try )r rP r� r� r7 r r6 rO r� rd r r@ ri rV rU rf r8 r� r` �
_shallow_copy�
_set_roundingr r? )r. r/ r; r@ �opr� �c�lr� r r� r5 r� r? r' r' r) �sqrt�
s`
z Decimal.sqrtc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j|�}|dkr�| j|�}|dkr�|}n| }|j|�S )z�Returns the larger value.
Like max(self, other) except if one is not a number, returns
NaN (and signals if one is sNaN). Also rounds.
T)r� Nr- r% r� )r� r rP r� r� r� r� �
compare_total)r. r� r/ �sn�onr+ r; r' r' r) r� % s&
z Decimal.maxc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j|�}|dkr�| j|�}|dkr�| }n|}|j|�S )z�Returns the smaller value.
Like min(self, other) except if one is not a number, returns
NaN (and signals if one is sNaN). Also rounds.
T)r� Nr- r% r� )r� r rP r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) r� O s&
z Decimal.minc C s8 | j r
dS | jdkrdS | j| jd� }|dt|� kS )z"Returns whether self is an integerFr% TNrQ )rP rO r8 rf )r. �restr' r' r) r� q s
zDecimal._isintegerc C s( | s| j dkrdS | jd| j dkS )z:Returns True if self is even. Assumes self is an integer.r% Tr- r� r� )rO r8 )r. r' r' r) r� z s zDecimal._isevenc C s. y| j t| j� d S tk
r( dS X dS )z$Return the adjusted exponent of selfr- r% N)rO rf r8 rr )r. r' r' r) r� � s zDecimal.adjustedc C s | S )z�Returns the same Decimal object.
As we do not have different encodings for the same number, the
received object already is in its canonical form.
r' )r. r' r' r) � canonical� s zDecimal.canonicalc C s. t |dd�}| j||�}|r |S | j||d�S )z�Compares self to the other operand numerically.
It's pretty much like compare(), but all NaNs signal, with signaling
NaNs taking precedence over quiet NaNs.
T)r� )r/ )r� r� r� )r. r� r/ r; r' r' r) �compare_signal� s
zDecimal.compare_signalc C sf t |dd�}| jr |j r tS | j r0|jr0tS | j}| j� }|j� }|sP|�r||kr�t| j�| jf}t|j�|jf}||k r�|r�tS tS ||kr�|r�tS tS tS |r�|dkr�tS |dkr�tS |dkr�tS |dkr�tS n4|dkr�tS |dkr�tS |dk�r tS |dk�rtS | |k �r tS | |k�r*tS | j|jk �rF|�rBtS tS | j|jk�rb|�r^tS tS tS )z�Compares self to other using the abstract representations.
This is not like the standard compare, which use their numerical
value. Note that a total ordering is defined for all possible abstract
representations.
T)r� r- r+ ) r� r7 � _NegativeOner r� rf r8 �_ZerorO )r. r� r/ r= Zself_nanZ other_nanZself_keyZ other_keyr' r' r) r. � sf
zDecimal.compare_totalc C s& t |dd�}| j� }|j� }|j|�S )z�Compares self to other using abstract repr., ignoring sign.
Like compare_total, but with operand's sign ignored and assumed to be 0.
T)r� )r� r� r. )r. r� r/ r� �or' r' r) �compare_total_mag� s zDecimal.compare_total_magc C s t d| j| j| j�S )z'Returns a copy with the sign set to 0. r% )r6 r8 rO rP )r. r' r' r) r� � s zDecimal.copy_absc C s2 | j rtd| j| j| j�S td| j| j| j�S dS )z&Returns a copy with the sign inverted.r% r- N)r7 r6 r8 rO rP )r. r' r' r) r� � s zDecimal.copy_negatec C s" t |dd�}t|j| j| j| j�S )z$Returns self with the sign of other.T)r� )r� r6 r7 r8 rO rP )r. r� r/ r' r' r) � copy_sign� s
zDecimal.copy_signc C s� |dkrt � }| j|d�}|r"|S | j� d kr2tS | s:tS | j� dkrNt| �S |j}| j� }| jdkr�|t t
|j d d ��kr�t dd|j d �}�n0| jdkr�|t t
|j
� d d ��kr�t dd|j
� d �}n�| jdko�|| k �r
t ddd|d d | �}n�| jdk�rB|| d k �rBt dd|d | d �}n�t| �}|j|j }}|jdk�rj| }d}xFt|||| �\} }
| d d
t t
| ��| d �r�P |d7 }�qpW t dt
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�}|j� }|jt�} |j|�}| |_|S ) zReturns e ** self.N)r/ r- r% r[ r� rQ r> ry r� r� )r r� r� r5 r r r@ r� r7 rf r` rA r6 r� ri rU rV r= �_dexpr( r) r r� r? ) r. r/ r; r �adjr* r+ r� r r� rV r? r' r' r) rV sJ $( "
z Decimal.expc C s dS )z�Return True if self is canonical; otherwise return False.
Currently, the encoding of a Decimal instance is always
canonical, so this method returns True for any Decimal.
Tr' )r. r' r' r) � is_canonicalL s zDecimal.is_canonicalc C s | j S )z�Return True if self is finite; otherwise return False.
A Decimal instance is considered finite if it is neither
infinite nor a NaN.
)rP )r. r' r' r) � is_finiteT s zDecimal.is_finitec C s
| j dkS )z8Return True if self is infinite; otherwise return False.rZ )rO )r. r' r' r) r# \ s zDecimal.is_infinitec C s
| j dkS )z>Return True if self is a qNaN or sNaN; otherwise return False.r5 rY )r5 rY )rO )r. r' r' r) r� ` s zDecimal.is_nanc C s, | j s | rdS |dkr t� }|j| j� kS )z?Return True if self is a normal number; otherwise return False.FN)rP r r" r� )r. r/ r' r' r) � is_normald s
zDecimal.is_normalc C s
| j dkS )z;Return True if self is a quiet NaN; otherwise return False.r5 )rO )r. r' r' r) r� l s zDecimal.is_qnanc C s
| j dkS )z8Return True if self is negative; otherwise return False.r- )r7 )r. r' r' r) � is_signedp s zDecimal.is_signedc C s
| j dkS )z?Return True if self is a signaling NaN; otherwise return False.rY )rO )r. r' r' r) r� t s zDecimal.is_snanc C s, | j s | rdS |dkr t� }| j� |jk S )z9Return True if self is subnormal; otherwise return False.FN)rP r r� r" )r. r/ r' r' r) � is_subnormalx s
zDecimal.is_subnormalc C s | j o| jdkS )z6Return True if self is a zero; otherwise return False.rQ )rP r8 )r. r' r' r) �is_zero� s zDecimal.is_zeroc C s� | j t| j� d }|dkr4tt|d d ��d S |dkrXttd| d d ��d S t| �}|j|j }}|dkr�t|d| �}t|�}t|�t|� ||k S |ttd| | �� d S )z�Compute a lower bound for the adjusted exponent of self.ln().
In other words, compute r such that self.ln() >= 10**r. Assumes
that self is finite and positive and that self != 1.
r- � r� r+ r% r� r� )rO rf r8 r` ri rU rV )r. r: r* r+ r� �num�denr' r' r) �
_ln_exp_bound� s zDecimal._ln_exp_boundc
C s |dkrt � }| j|d�}|r"|S | s*tS | j� dkr:tS | tkrFtS | jdkr\|jt d�S t
| �}|j |j }}|j
}|| j� d }x>t|||�}|ddttt|���| d r�P |d7 }q�W tt |d k �tt|��| �}|j� }|jt�} |j|�}| |_|S )
z/Returns the natural (base e) logarithm of self.N)r/ r- zln of a negative valuer+ ry r� r[ r% )r r� �_NegativeInfinityr� � _Infinityr r5 r7 rd r ri rU rV r@ rD �_dlogrf r` rh r6 r( r) r r� r? )
r. r/ r; r* r+ r� r r% r� r? r' r' r) �ln� s:
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Decimal.lnc C s� | j t| j� d }|dkr,tt|��d S |dkrHttd| ��d S t| �}|j|j }}|dkr�t|d| �}td| �}t|�t|� ||k d S td| | �}t|�| |dk d S ) z�Compute a lower bound for the adjusted exponent of self.log10().
In other words, find r such that self.log10() >= 10**r.
Assumes that self is finite and positive and that self != 1.
r- r+ r% r� �� Z231r� r� )rO rf r8 r` ri rU rV )r. r: r* r+ r� rB rC r' r' r) r � s zDecimal._log10_exp_boundc
C sH |dkrt � }| j|d�}|r"|S | s*tS | j� dkr:tS | jdkrP|jtd�S | jd dkr�| jdd� dt | j�d kr�t
| j t | j� d �}n�t | �}|j
|j }}|j}|| j� d }x>t|||�}|d d
t tt|���| d r�P |d 7 }q�W tt
|dk �tt|��| �}|j� }|jt�} |j|�}| |_|S ) z&Returns the base 10 logarithm of self.N)r/ r- zlog10 of a negative valuer% r� rQ r+ ry r� r[ )r r� rE r� rF r7 rd r r8 rf r rO ri rU rV r@ r �_dlog10r` rh r6 r( r) r r� r? )
r. r/ r; r* r+ r� r r% r� r? r' r' r) �log10� s:
. $
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Decimal.log10c C sV | j |d�}|r|S |dkr"t� }| j� r.tS | s@|jtdd�S t| j� �}|j|�S )aM Returns the exponent of the magnitude of self's MSD.
The result is the integer which is the exponent of the magnitude
of the most significant digit of self (as though it were truncated
to a single digit while maintaining the value of that digit and
without limiting the resulting exponent).
)r/ Nzlogb(0)r- ) r� r r� rF rd r
r r� r� )r. r/ r; r' r' r) �logb
s z Decimal.logbc C s8 | j dks| jdkrdS x| jD ]}|dkr dS q W dS )z�Return True if self is a logical operand.
For being logical, it must be a finite number with a sign of 0,
an exponent of 0, and a coefficient whose digits must all be
either 0 or 1.
r% FZ01T)r7 rO r8 )r. �digr' r' r) �
_islogical>
s zDecimal._islogicalc C s� |j t|� }|dkr$d| | }n|dk r<||j d � }|j t|� }|dkr`d| | }n|dk rx||j d � }||fS )Nr% rQ )r@ rf )r. r/ �opa�opbZdifr' r' r) �
_fill_logicalL
s zDecimal._fill_logicalc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z;Applies an 'and' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�@ ��qS r' )r` rU )�.0r �br' r' r) �
<listcomp>g
s z'Decimal.logical_and.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn �zipr6 rg )r. r� r/ rO rP r� r' r' r) � logical_andY
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zDecimal.logical_andc C s( |dkrt � }| jtdd|j d�|�S )zInvert all its digits.Nr% r� )r � logical_xorr6 r@ )r. r/ r' r' r) �logical_invertj
s zDecimal.logical_invertc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z:Applies an 'or' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�B ��qS r' )r` rU )rR r rS r' r' r) rT
s z&Decimal.logical_or.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn rU r6 rg )r. r� r/ rO rP r� r' r' r) �
logical_orq
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zDecimal.logical_orc C s~ |dkrt � }t|dd�}| j� s.|j� r8|jt�S | j|| j|j�\}}djdd� t||�D ��}t d|j
d�pxdd�S ) z;Applies an 'xor' operation between self and other's digits.NT)r� rS c S s$ g | ] \}}t t|�t|�A ��qS r' )r` rU )rR r rS r' r' r) rT �
s z'Decimal.logical_xor.<locals>.<listcomp>r% rQ ) r r� rN rd r rQ r8 rn rU r6 rg )r. r� r/ rO rP r� r' r' r) rW �
s
zDecimal.logical_xorc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j� j|j� �}|dkr�| j|�}|dkr�|}n| }|j|�S )z8Compares the values numerically with their sign ignored.T)r� Nr- r% r� ) r� r rP r� r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) �max_mag�
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zDecimal.max_magc C s� t |dd�}|dkrt� }| js&|jr~| j� }|j� }|s>|r~|dkrX|dkrX| j|�S |dkrr|dkrr|j|�S | j||�S | j� j|j� �}|dkr�| j|�}|dkr�| }n|}|j|�S )z8Compares the values numerically with their sign ignored.T)r� Nr- r% r� ) r� r rP r� r� r� r� r� r. )r. r� r/ r/ r0 r+ r; r' r' r) �min_mag�
s&
zDecimal.min_magc C s� |dkrt � }| j|d�}|r"|S | j� dkr2tS | j� dkrTtdd|j |j� �S |j� }|jt � |j
� | j |�}|| kr�|S | j tdd|j
� d �|�S )z=Returns the largest representable number smaller than itself.N)r/ r- r% r> r� r� )r r� r� rE r6 r@ r� rH r) r �_ignore_all_flagsr� r� r� )r. r/ r; �new_selfr' r' r) �
next_minus�
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zDecimal.next_minusc C s� |dkrt � }| j|d�}|r"|S | j� dkr2tS | j� dkrTtdd|j |j� �S |j� }|jt � |j
� | j |�}|| kr�|S | j tdd|j
� d �|�S )z=Returns the smallest representable number larger than itself.N)r/ r- r> r% r� r� )r r� r� rF r6 r@ r� rH r) r r\ r� r� r� )r. r/ r; r] r' r' r) � next_plus�
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zDecimal.next_plusc C s� t |dd�}|dkrt� }| j||�}|r.|S | j|�}|dkrJ| j|�S |dkr^| j|�}n
| j|�}|j� r�|jt d|j
� |jt � |jt � nD|j
� |jk r�|jt� |jt� |jt � |jt � |s�|jt� |S )a� Returns the number closest to self, in the direction towards other.
The result is the closest representable number to self
(excluding self) that is in the direction towards other,
unless both have the same value. If the two operands are
numerically equal, then the result is a copy of self with the
sign set to be the same as the sign of other.
T)r� Nr% r- z Infinite result from next_towardr� )r� r r� r� r8 r_ r^ r� rd r r7 r r r� r" r r
r )r. r� r/ r; Z
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zDecimal.next_towardc C s� | j � r dS | j� rdS | j� }|dkr,dS |dkr8dS | j� rN| jrJdS dS |dkr\t� }| j|d �rv| jrrd
S d S | jr�d S d
S dS )a Returns an indication of the class of self.
The class is one of the following strings:
sNaN
NaN
-Infinity
-Normal
-Subnormal
-Zero
+Zero
+Subnormal
+Normal
+Infinity
r� r� r- z +Infinityz -Infinityz-Zeroz+ZeroN)r/ z
-Subnormalz
+Subnormalz-Normalz+Normalr� )r� r� r� r@ r7 r r? )r. r/ �infr' r' r) � number_class+ s, zDecimal.number_classc C s t d�S )z'Just returns 10, as this is Decimal, :)r� )r )r. r' r' r) �radixU s z
Decimal.radixc C s� |dkrt � }t|dd�}| j||�}|r.|S |jdkrB|jt�S |j t|� ko^|jkn sn|jt�S | j� r~t | �S t|�}| j
}|jt |� }|dkr�d| | }n|dk r�|| d� }||d� |d|� }t | j
|jd�p�d| j�S )z5Returns a rotated copy of self, value-of-other times.NT)r� r% rQ )r r� r� rO rd r r@ rU r� r r8 rf r6 r7 rg )r. r� r/ r; �torot�rotdig�topadZrotatedr' r' r) �rotateY s,
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zDecimal.rotatec C s� |dkrt � }t|dd�}| j||�}|r.|S |jdkrB|jt�S d|j|j }d|j|j }|t|� kox|kn s�|jt�S | j � r�t
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| jt|� �}|j|�}|S )z>Returns self operand after adding the second value to its exp.NT)r� r% r+ r� )r r� r� rO rd r rA r@ rU r� r r6 r7 r8 r� )r. r� r/ r; ZliminfZlimsupr r' r' r) �scalebz s"
zDecimal.scalebc C s |dkrt � }t|dd�}| j||�}|r.|S |jdkrB|jt�S |j t|� ko^|jkn sn|jt�S | j� r~t | �S t|�}| j
}|jt |� }|dkr�d| | }n|dk r�|| d� }|dk r�|d|� }n |d| }||j d� }t | j
|jd��p d| j�S )z5Returns a shifted copy of self, value-of-other times.NT)r� r% rQ )r r� r� rO rd r r@ rU r� r r8 rf r6 r7 rg )r. r� r/ r; rd re rf Zshiftedr' r' r) r� � s2
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Decimal.shiftc C s | j t| �ffS )N)� __class__r` )r. r' r' r) �
__reduce__� s zDecimal.__reduce__c C s t | �tkr| S | jt| ��S )N)�typer ri r` )r. r' r' r) �__copy__� s zDecimal.__copy__c C s t | �tkr| S | jt| ��S )N)rk r ri r` )r. �memor' r' r) � __deepcopy__� s zDecimal.__deepcopy__c C sN |dkrt � }t||d�}| jrXt| j|�}t| j� �}|d dkrL|d7 }t|||�S |d dkrvddg|j |d< |d dkr�t | j| j
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type is omitted it defaults to 'g' or 'G', depending on the
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traps - If traps[exception] = 1, then the exception is
raised when it is caused. Otherwise, a value is
substituted in.
flags - When an exception is caused, flags[exception] is set.
(Whether or not the trap_enabler is set)
Should be reset by user of Decimal instance.
Emin - Minimum exponent
Emax - Maximum exponent
capitals - If 1, 1*10^1 is printed as 1E+1.
If 0, printed as 1e1
clamp - If 1, change exponents if too high (Default 0)
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� D ��| _n� | _d S )Nc 3 s | ]}|t |� k�fV qd S )N)rU )rR r� )r r' r) � <genexpr>n s z#Context.__init__.<locals>.<genexpr>r% c 3 s | ]}|t |� k�fV qd S )N)rU )rR r� )r r' r) r� u s )r � NameErrorr@ r? r" rA r� r� �_ignored_flagsr rH r_ r� r �fromkeysr ) r. r@ r? r" rA r� r� r r r� Zdcr' )r r r) r� U s.
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C s. t | j| j| j| j| j| j| j| j| j � }|S )z!Returns a shallow copy from self.)
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� }|S )z Returns a deep copy from self.) r r@ r? r" rA r� r� r rH r r� )r. r� r' r' r) rH � s
z Context.copyc G sZ t j||�}|| jkr(|� j| f|�� S d| j|< | j| sN|� j| f|�� S ||��dS )a# Handles an error
If the flag is in _ignored_flags, returns the default response.
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trap_enabler is set, it reraises the exception. Otherwise, it returns
the default value after setting the flag.
r- N)�_condition_map�getr� r0 r r )r. Z conditionZ explanationr( �errorr' r' r) rd � s
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_ignore_flagsr )r. r' r' r) r\ � s zContext._ignore_all_flagsc G s | j t|� | _ t|�S )z$Ignore the flags, if they are raised)r� rj )r. r r' r' r) r� � s zContext._ignore_flagsc G s< |r t |d ttf�r |d }x|D ]}| jj|� q$W dS )z+Stop ignoring the flags, if they are raisedr% N)r_ rk rj r� �remove)r. r r� r' r' r) �
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zContext._regard_flagsc C s t | j| j d �S )z!Returns Etiny (= Emin - prec + 1)r- )rU r" r@ )r. r' r' r) r� s z
Context.Etinyc C s t | j| j d �S )z,Returns maximum exponent (= Emax - prec + 1)r- )rU rA r@ )r. r' r' r) r� s z Context.Etopc C s | j }|| _ |S )a� Sets the rounding type.
Sets the rounding type, and returns the current (previous)
rounding type. Often used like:
context = context.copy()
# so you don't change the calling context
# if an error occurs in the middle.
rounding = context._set_rounding(ROUND_UP)
val = self.__sub__(other, context=context)
context._set_rounding(rounding)
This will make it round up for that operation.
)r? )r. rk r? r' r' r) r) s zContext._set_roundingrQ c C sj t |t�r*||j� ks d|kr*| jtd�S t|| d�}|j� r`t|j�| j | j
kr`| jtd�S |j | �S )z�Creates a new Decimal instance but using self as context.
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IBM Decimal specification.rR zAtrailing or leading whitespace and underscores are not permitted.)r/ z diagnostic info too long in NaN) r_ r` rb rd r r r� rf r8 r@ r� r� )r. rB r r' r' r) �create_decimal# s zContext.create_decimalc C s t j|�}|j| �S )a� Creates a new Decimal instance from a float but rounding using self
as the context.
>>> context = Context(prec=5, rounding=ROUND_DOWN)
>>> context.create_decimal_from_float(3.1415926535897932)
Decimal('3.1415')
>>> context = Context(prec=5, traps=[Inexact])
>>> context.create_decimal_from_float(3.1415926535897932)
Traceback (most recent call last):
...
decimal.Inexact: None
)r rq r� )r. r~ r r' r' r) �create_decimal_from_float4 s
z!Context.create_decimal_from_floatc C s t |dd�}|j| d�S )a[ Returns the absolute value of the operand.
If the operand is negative, the result is the same as using the minus
operation on the operand. Otherwise, the result is the same as using
the plus operation on the operand.
>>> ExtendedContext.abs(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.abs(Decimal('-100'))
Decimal('100')
>>> ExtendedContext.abs(Decimal('101.5'))
Decimal('101.5')
>>> ExtendedContext.abs(Decimal('-101.5'))
Decimal('101.5')
>>> ExtendedContext.abs(-1)
Decimal('1')
T)r� )r/ )r� r� )r. r r' r' r) rh F s z Context.absc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Return the sum of the two operands.
>>> ExtendedContext.add(Decimal('12'), Decimal('7.00'))
Decimal('19.00')
>>> ExtendedContext.add(Decimal('1E+2'), Decimal('1.01E+4'))
Decimal('1.02E+4')
>>> ExtendedContext.add(1, Decimal(2))
Decimal('3')
>>> ExtendedContext.add(Decimal(8), 5)
Decimal('13')
>>> ExtendedContext.add(5, 5)
Decimal('10')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �add[ s
z Context.addc C s t |j| ��S )N)r` r� )r. r r' r' r) �_applyp s zContext._applyc C s t |t�std��|j� S )z�Returns the same Decimal object.
As we do not have different encodings for the same number, the
received object already is in its canonical form.
>>> ExtendedContext.canonical(Decimal('2.50'))
Decimal('2.50')
z,canonical requires a Decimal as an argument.)r_ r rr r2 )r. r r' r' r) r2 s s
zContext.canonicalc C s t |dd�}|j|| d�S )a� Compares values numerically.
If the signs of the operands differ, a value representing each operand
('-1' if the operand is less than zero, '0' if the operand is zero or
negative zero, or '1' if the operand is greater than zero) is used in
place of that operand for the comparison instead of the actual
operand.
The comparison is then effected by subtracting the second operand from
the first and then returning a value according to the result of the
subtraction: '-1' if the result is less than zero, '0' if the result is
zero or negative zero, or '1' if the result is greater than zero.
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.1'))
Decimal('0')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.10'))
Decimal('0')
>>> ExtendedContext.compare(Decimal('3'), Decimal('2.1'))
Decimal('1')
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('-3'))
Decimal('1')
>>> ExtendedContext.compare(Decimal('-3'), Decimal('2.1'))
Decimal('-1')
>>> ExtendedContext.compare(1, 2)
Decimal('-1')
>>> ExtendedContext.compare(Decimal(1), 2)
Decimal('-1')
>>> ExtendedContext.compare(1, Decimal(2))
Decimal('-1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s ! zContext.comparec C s t |dd�}|j|| d�S )a Compares the values of the two operands numerically.
It's pretty much like compare(), but all NaNs signal, with signaling
NaNs taking precedence over quiet NaNs.
>>> c = ExtendedContext
>>> c.compare_signal(Decimal('2.1'), Decimal('3'))
Decimal('-1')
>>> c.compare_signal(Decimal('2.1'), Decimal('2.1'))
Decimal('0')
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.compare_signal(Decimal('NaN'), Decimal('2.1'))
Decimal('NaN')
>>> print(c.flags[InvalidOperation])
1
>>> c.flags[InvalidOperation] = 0
>>> print(c.flags[InvalidOperation])
0
>>> c.compare_signal(Decimal('sNaN'), Decimal('2.1'))
Decimal('NaN')
>>> print(c.flags[InvalidOperation])
1
>>> c.compare_signal(-1, 2)
Decimal('-1')
>>> c.compare_signal(Decimal(-1), 2)
Decimal('-1')
>>> c.compare_signal(-1, Decimal(2))
Decimal('-1')
T)r� )r/ )r� r3 )r. r rS r' r' r) r3 � s zContext.compare_signalc C s t |dd�}|j|�S )a+ Compares two operands using their abstract representation.
This is not like the standard compare, which use their numerical
value. Note that a total ordering is defined for all possible abstract
representations.
>>> ExtendedContext.compare_total(Decimal('12.73'), Decimal('127.9'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('-127'), Decimal('12'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('12.30'), Decimal('12.3'))
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal('12.30'), Decimal('12.30'))
Decimal('0')
>>> ExtendedContext.compare_total(Decimal('12.3'), Decimal('12.300'))
Decimal('1')
>>> ExtendedContext.compare_total(Decimal('12.3'), Decimal('NaN'))
Decimal('-1')
>>> ExtendedContext.compare_total(1, 2)
Decimal('-1')
>>> ExtendedContext.compare_total(Decimal(1), 2)
Decimal('-1')
>>> ExtendedContext.compare_total(1, Decimal(2))
Decimal('-1')
T)r� )r� r. )r. r rS r' r' r) r. � s zContext.compare_totalc C s t |dd�}|j|�S )z�Compares two operands using their abstract representation ignoring sign.
Like compare_total, but with operand's sign ignored and assumed to be 0.
T)r� )r� r7 )r. r rS r' r' r) r7 � s zContext.compare_total_magc C s t |dd�}|j� S )a Returns a copy of the operand with the sign set to 0.
>>> ExtendedContext.copy_abs(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.copy_abs(Decimal('-100'))
Decimal('100')
>>> ExtendedContext.copy_abs(-1)
Decimal('1')
T)r� )r� r� )r. r r' r' r) r� � s
zContext.copy_absc C s t |dd�}t|�S )a Returns a copy of the decimal object.
>>> ExtendedContext.copy_decimal(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.copy_decimal(Decimal('-1.00'))
Decimal('-1.00')
>>> ExtendedContext.copy_decimal(1)
Decimal('1')
T)r� )r� r )r. r r' r' r) � copy_decimal� s
zContext.copy_decimalc C s t |dd�}|j� S )a( Returns a copy of the operand with the sign inverted.
>>> ExtendedContext.copy_negate(Decimal('101.5'))
Decimal('-101.5')
>>> ExtendedContext.copy_negate(Decimal('-101.5'))
Decimal('101.5')
>>> ExtendedContext.copy_negate(1)
Decimal('-1')
T)r� )r� r� )r. r r' r' r) r� s
zContext.copy_negatec C s t |dd�}|j|�S )a Copies the second operand's sign to the first one.
In detail, it returns a copy of the first operand with the sign
equal to the sign of the second operand.
>>> ExtendedContext.copy_sign(Decimal( '1.50'), Decimal('7.33'))
Decimal('1.50')
>>> ExtendedContext.copy_sign(Decimal('-1.50'), Decimal('7.33'))
Decimal('1.50')
>>> ExtendedContext.copy_sign(Decimal( '1.50'), Decimal('-7.33'))
Decimal('-1.50')
>>> ExtendedContext.copy_sign(Decimal('-1.50'), Decimal('-7.33'))
Decimal('-1.50')
>>> ExtendedContext.copy_sign(1, -2)
Decimal('-1')
>>> ExtendedContext.copy_sign(Decimal(1), -2)
Decimal('-1')
>>> ExtendedContext.copy_sign(1, Decimal(-2))
Decimal('-1')
T)r� )r� r8 )r. r rS r' r' r) r8 s zContext.copy_signc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Decimal division in a specified context.
>>> ExtendedContext.divide(Decimal('1'), Decimal('3'))
Decimal('0.333333333')
>>> ExtendedContext.divide(Decimal('2'), Decimal('3'))
Decimal('0.666666667')
>>> ExtendedContext.divide(Decimal('5'), Decimal('2'))
Decimal('2.5')
>>> ExtendedContext.divide(Decimal('1'), Decimal('10'))
Decimal('0.1')
>>> ExtendedContext.divide(Decimal('12'), Decimal('12'))
Decimal('1')
>>> ExtendedContext.divide(Decimal('8.00'), Decimal('2'))
Decimal('4.00')
>>> ExtendedContext.divide(Decimal('2.400'), Decimal('2.0'))
Decimal('1.20')
>>> ExtendedContext.divide(Decimal('1000'), Decimal('100'))
Decimal('10')
>>> ExtendedContext.divide(Decimal('1000'), Decimal('1'))
Decimal('1000')
>>> ExtendedContext.divide(Decimal('2.40E+6'), Decimal('2'))
Decimal('1.20E+6')
>>> ExtendedContext.divide(5, 5)
Decimal('1')
>>> ExtendedContext.divide(Decimal(5), 5)
Decimal('1')
>>> ExtendedContext.divide(5, Decimal(5))
Decimal('1')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �divide+ s
zContext.dividec C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a/ Divides two numbers and returns the integer part of the result.
>>> ExtendedContext.divide_int(Decimal('2'), Decimal('3'))
Decimal('0')
>>> ExtendedContext.divide_int(Decimal('10'), Decimal('3'))
Decimal('3')
>>> ExtendedContext.divide_int(Decimal('1'), Decimal('0.3'))
Decimal('3')
>>> ExtendedContext.divide_int(10, 3)
Decimal('3')
>>> ExtendedContext.divide_int(Decimal(10), 3)
Decimal('3')
>>> ExtendedContext.divide_int(10, Decimal(3))
Decimal('3')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �
divide_intP s
zContext.divide_intc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� Return (a // b, a % b).
>>> ExtendedContext.divmod(Decimal(8), Decimal(3))
(Decimal('2'), Decimal('2'))
>>> ExtendedContext.divmod(Decimal(8), Decimal(4))
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(8, 4)
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(Decimal(8), 4)
(Decimal('2'), Decimal('0'))
>>> ExtendedContext.divmod(8, Decimal(4))
(Decimal('2'), Decimal('0'))
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) r� g s
zContext.divmodc C s t |dd�}|j| d�S )a# Returns e ** a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.exp(Decimal('-Infinity'))
Decimal('0')
>>> c.exp(Decimal('-1'))
Decimal('0.367879441')
>>> c.exp(Decimal('0'))
Decimal('1')
>>> c.exp(Decimal('1'))
Decimal('2.71828183')
>>> c.exp(Decimal('0.693147181'))
Decimal('2.00000000')
>>> c.exp(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.exp(10)
Decimal('22026.4658')
T)r� )r/ )r� rV )r. r r' r' r) rV | s z Context.expc C s t |dd�}|j||| d�S )a Returns a multiplied by b, plus c.
The first two operands are multiplied together, using multiply,
the third operand is then added to the result of that
multiplication, using add, all with only one final rounding.
>>> ExtendedContext.fma(Decimal('3'), Decimal('5'), Decimal('7'))
Decimal('22')
>>> ExtendedContext.fma(Decimal('3'), Decimal('-5'), Decimal('7'))
Decimal('-8')
>>> ExtendedContext.fma(Decimal('888565290'), Decimal('1557.96930'), Decimal('-86087.7578'))
Decimal('1.38435736E+12')
>>> ExtendedContext.fma(1, 3, 4)
Decimal('7')
>>> ExtendedContext.fma(1, Decimal(3), 4)
Decimal('7')
>>> ExtendedContext.fma(1, 3, Decimal(4))
Decimal('7')
T)r� )r/ )r� r� )r. r rS r+ r' r' r) r� � s z Context.fmac C s t |t�std��|j� S )a Return True if the operand is canonical; otherwise return False.
Currently, the encoding of a Decimal instance is always
canonical, so this method returns True for any Decimal.
>>> ExtendedContext.is_canonical(Decimal('2.50'))
True
z/is_canonical requires a Decimal as an argument.)r_ r rr r; )r. r r' r' r) r; � s
zContext.is_canonicalc C s t |dd�}|j� S )a, Return True if the operand is finite; otherwise return False.
A Decimal instance is considered finite if it is neither
infinite nor a NaN.
>>> ExtendedContext.is_finite(Decimal('2.50'))
True
>>> ExtendedContext.is_finite(Decimal('-0.3'))
True
>>> ExtendedContext.is_finite(Decimal('0'))
True
>>> ExtendedContext.is_finite(Decimal('Inf'))
False
>>> ExtendedContext.is_finite(Decimal('NaN'))
False
>>> ExtendedContext.is_finite(1)
True
T)r� )r� r< )r. r r' r' r) r< � s zContext.is_finitec C s t |dd�}|j� S )aU Return True if the operand is infinite; otherwise return False.
>>> ExtendedContext.is_infinite(Decimal('2.50'))
False
>>> ExtendedContext.is_infinite(Decimal('-Inf'))
True
>>> ExtendedContext.is_infinite(Decimal('NaN'))
False
>>> ExtendedContext.is_infinite(1)
False
T)r� )r� r# )r. r r' r' r) r# � s zContext.is_infinitec C s t |dd�}|j� S )aO Return True if the operand is a qNaN or sNaN;
otherwise return False.
>>> ExtendedContext.is_nan(Decimal('2.50'))
False
>>> ExtendedContext.is_nan(Decimal('NaN'))
True
>>> ExtendedContext.is_nan(Decimal('-sNaN'))
True
>>> ExtendedContext.is_nan(1)
False
T)r� )r� r� )r. r r' r' r) r� � s
zContext.is_nanc C s t |dd�}|j| d�S )a� Return True if the operand is a normal number;
otherwise return False.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.is_normal(Decimal('2.50'))
True
>>> c.is_normal(Decimal('0.1E-999'))
False
>>> c.is_normal(Decimal('0.00'))
False
>>> c.is_normal(Decimal('-Inf'))
False
>>> c.is_normal(Decimal('NaN'))
False
>>> c.is_normal(1)
True
T)r� )r/ )r� r= )r. r r' r' r) r= � s zContext.is_normalc C s t |dd�}|j� S )aH Return True if the operand is a quiet NaN; otherwise return False.
>>> ExtendedContext.is_qnan(Decimal('2.50'))
False
>>> ExtendedContext.is_qnan(Decimal('NaN'))
True
>>> ExtendedContext.is_qnan(Decimal('sNaN'))
False
>>> ExtendedContext.is_qnan(1)
False
T)r� )r� r� )r. r r' r' r) r� s zContext.is_qnanc C s t |dd�}|j� S )a� Return True if the operand is negative; otherwise return False.
>>> ExtendedContext.is_signed(Decimal('2.50'))
False
>>> ExtendedContext.is_signed(Decimal('-12'))
True
>>> ExtendedContext.is_signed(Decimal('-0'))
True
>>> ExtendedContext.is_signed(8)
False
>>> ExtendedContext.is_signed(-8)
True
T)r� )r� r> )r. r r' r' r) r> s zContext.is_signedc C s t |dd�}|j� S )aT Return True if the operand is a signaling NaN;
otherwise return False.
>>> ExtendedContext.is_snan(Decimal('2.50'))
False
>>> ExtendedContext.is_snan(Decimal('NaN'))
False
>>> ExtendedContext.is_snan(Decimal('sNaN'))
True
>>> ExtendedContext.is_snan(1)
False
T)r� )r� r� )r. r r' r' r) r� $ s
zContext.is_snanc C s t |dd�}|j| d�S )a� Return True if the operand is subnormal; otherwise return False.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.is_subnormal(Decimal('2.50'))
False
>>> c.is_subnormal(Decimal('0.1E-999'))
True
>>> c.is_subnormal(Decimal('0.00'))
False
>>> c.is_subnormal(Decimal('-Inf'))
False
>>> c.is_subnormal(Decimal('NaN'))
False
>>> c.is_subnormal(1)
False
T)r� )r/ )r� r? )r. r r' r' r) r? 4 s zContext.is_subnormalc C s t |dd�}|j� S )au Return True if the operand is a zero; otherwise return False.
>>> ExtendedContext.is_zero(Decimal('0'))
True
>>> ExtendedContext.is_zero(Decimal('2.50'))
False
>>> ExtendedContext.is_zero(Decimal('-0E+2'))
True
>>> ExtendedContext.is_zero(1)
False
>>> ExtendedContext.is_zero(0)
True
T)r� )r� r@ )r. r r' r' r) r@ J s zContext.is_zeroc C s t |dd�}|j| d�S )a� Returns the natural (base e) logarithm of the operand.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.ln(Decimal('0'))
Decimal('-Infinity')
>>> c.ln(Decimal('1.000'))
Decimal('0')
>>> c.ln(Decimal('2.71828183'))
Decimal('1.00000000')
>>> c.ln(Decimal('10'))
Decimal('2.30258509')
>>> c.ln(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.ln(1)
Decimal('0')
T)r� )r/ )r� rH )r. r r' r' r) rH [ s z
Context.lnc C s t |dd�}|j| d�S )a� Returns the base 10 logarithm of the operand.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.log10(Decimal('0'))
Decimal('-Infinity')
>>> c.log10(Decimal('0.001'))
Decimal('-3')
>>> c.log10(Decimal('1.000'))
Decimal('0')
>>> c.log10(Decimal('2'))
Decimal('0.301029996')
>>> c.log10(Decimal('10'))
Decimal('1')
>>> c.log10(Decimal('70'))
Decimal('1.84509804')
>>> c.log10(Decimal('+Infinity'))
Decimal('Infinity')
>>> c.log10(0)
Decimal('-Infinity')
>>> c.log10(1)
Decimal('0')
T)r� )r/ )r� rK )r. r r' r' r) rK q s z
Context.log10c C s t |dd�}|j| d�S )a4 Returns the exponent of the magnitude of the operand's MSD.
The result is the integer which is the exponent of the magnitude
of the most significant digit of the operand (as though the
operand were truncated to a single digit while maintaining the
value of that digit and without limiting the resulting exponent).
>>> ExtendedContext.logb(Decimal('250'))
Decimal('2')
>>> ExtendedContext.logb(Decimal('2.50'))
Decimal('0')
>>> ExtendedContext.logb(Decimal('0.03'))
Decimal('-2')
>>> ExtendedContext.logb(Decimal('0'))
Decimal('-Infinity')
>>> ExtendedContext.logb(1)
Decimal('0')
>>> ExtendedContext.logb(10)
Decimal('1')
>>> ExtendedContext.logb(100)
Decimal('2')
T)r� )r/ )r� rL )r. r r' r' r) rL � s z Context.logbc C s t |dd�}|j|| d�S )a� Applies the logical operation 'and' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_and(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('0'), Decimal('1'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('1'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_and(Decimal('1'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_and(Decimal('1100'), Decimal('1010'))
Decimal('1000')
>>> ExtendedContext.logical_and(Decimal('1111'), Decimal('10'))
Decimal('10')
>>> ExtendedContext.logical_and(110, 1101)
Decimal('100')
>>> ExtendedContext.logical_and(Decimal(110), 1101)
Decimal('100')
>>> ExtendedContext.logical_and(110, Decimal(1101))
Decimal('100')
T)r� )r/ )r� rV )r. r rS r' r' r) rV � s zContext.logical_andc C s t |dd�}|j| d�S )a Invert all the digits in the operand.
The operand must be a logical number.
>>> ExtendedContext.logical_invert(Decimal('0'))
Decimal('111111111')
>>> ExtendedContext.logical_invert(Decimal('1'))
Decimal('111111110')
>>> ExtendedContext.logical_invert(Decimal('111111111'))
Decimal('0')
>>> ExtendedContext.logical_invert(Decimal('101010101'))
Decimal('10101010')
>>> ExtendedContext.logical_invert(1101)
Decimal('111110010')
T)r� )r/ )r� rX )r. r r' r' r) rX � s zContext.logical_invertc C s t |dd�}|j|| d�S )a� Applies the logical operation 'or' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_or(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_or(Decimal('0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1'), Decimal('0'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_or(Decimal('1100'), Decimal('1010'))
Decimal('1110')
>>> ExtendedContext.logical_or(Decimal('1110'), Decimal('10'))
Decimal('1110')
>>> ExtendedContext.logical_or(110, 1101)
Decimal('1111')
>>> ExtendedContext.logical_or(Decimal(110), 1101)
Decimal('1111')
>>> ExtendedContext.logical_or(110, Decimal(1101))
Decimal('1111')
T)r� )r/ )r� rY )r. r rS r' r' r) rY � s zContext.logical_orc C s t |dd�}|j|| d�S )a� Applies the logical operation 'xor' between each operand's digits.
The operands must be both logical numbers.
>>> ExtendedContext.logical_xor(Decimal('0'), Decimal('0'))
Decimal('0')
>>> ExtendedContext.logical_xor(Decimal('0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.logical_xor(Decimal('1'), Decimal('0'))
Decimal('1')
>>> ExtendedContext.logical_xor(Decimal('1'), Decimal('1'))
Decimal('0')
>>> ExtendedContext.logical_xor(Decimal('1100'), Decimal('1010'))
Decimal('110')
>>> ExtendedContext.logical_xor(Decimal('1111'), Decimal('10'))
Decimal('1101')
>>> ExtendedContext.logical_xor(110, 1101)
Decimal('1011')
>>> ExtendedContext.logical_xor(Decimal(110), 1101)
Decimal('1011')
>>> ExtendedContext.logical_xor(110, Decimal(1101))
Decimal('1011')
T)r� )r/ )r� rW )r. r rS r' r' r) rW � s zContext.logical_xorc C s t |dd�}|j|| d�S )a� max compares two values numerically and returns the maximum.
If either operand is a NaN then the general rules apply.
Otherwise, the operands are compared as though by the compare
operation. If they are numerically equal then the left-hand operand
is chosen as the result. Otherwise the maximum (closer to positive
infinity) of the two operands is chosen as the result.
>>> ExtendedContext.max(Decimal('3'), Decimal('2'))
Decimal('3')
>>> ExtendedContext.max(Decimal('-10'), Decimal('3'))
Decimal('3')
>>> ExtendedContext.max(Decimal('1.0'), Decimal('1'))
Decimal('1')
>>> ExtendedContext.max(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.max(1, 2)
Decimal('2')
>>> ExtendedContext.max(Decimal(1), 2)
Decimal('2')
>>> ExtendedContext.max(1, Decimal(2))
Decimal('2')
T)r� )r/ )r� r� )r. r rS r' r' r) r� s z Context.maxc C s t |dd�}|j|| d�S )a� Compares the values numerically with their sign ignored.
>>> ExtendedContext.max_mag(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.max_mag(Decimal('7'), Decimal('-10'))
Decimal('-10')
>>> ExtendedContext.max_mag(1, -2)
Decimal('-2')
>>> ExtendedContext.max_mag(Decimal(1), -2)
Decimal('-2')
>>> ExtendedContext.max_mag(1, Decimal(-2))
Decimal('-2')
T)r� )r/ )r� rZ )r. r rS r' r' r) rZ & s zContext.max_magc C s t |dd�}|j|| d�S )a� min compares two values numerically and returns the minimum.
If either operand is a NaN then the general rules apply.
Otherwise, the operands are compared as though by the compare
operation. If they are numerically equal then the left-hand operand
is chosen as the result. Otherwise the minimum (closer to negative
infinity) of the two operands is chosen as the result.
>>> ExtendedContext.min(Decimal('3'), Decimal('2'))
Decimal('2')
>>> ExtendedContext.min(Decimal('-10'), Decimal('3'))
Decimal('-10')
>>> ExtendedContext.min(Decimal('1.0'), Decimal('1'))
Decimal('1.0')
>>> ExtendedContext.min(Decimal('7'), Decimal('NaN'))
Decimal('7')
>>> ExtendedContext.min(1, 2)
Decimal('1')
>>> ExtendedContext.min(Decimal(1), 2)
Decimal('1')
>>> ExtendedContext.min(1, Decimal(29))
Decimal('1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� 7 s z Context.minc C s t |dd�}|j|| d�S )a� Compares the values numerically with their sign ignored.
>>> ExtendedContext.min_mag(Decimal('3'), Decimal('-2'))
Decimal('-2')
>>> ExtendedContext.min_mag(Decimal('-3'), Decimal('NaN'))
Decimal('-3')
>>> ExtendedContext.min_mag(1, -2)
Decimal('1')
>>> ExtendedContext.min_mag(Decimal(1), -2)
Decimal('1')
>>> ExtendedContext.min_mag(1, Decimal(-2))
Decimal('1')
T)r� )r/ )r� r[ )r. r rS r' r' r) r[ R s zContext.min_magc C s t |dd�}|j| d�S )a� Minus corresponds to unary prefix minus in Python.
The operation is evaluated using the same rules as subtract; the
operation minus(a) is calculated as subtract('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedContext.minus(Decimal('1.3'))
Decimal('-1.3')
>>> ExtendedContext.minus(Decimal('-1.3'))
Decimal('1.3')
>>> ExtendedContext.minus(1)
Decimal('-1')
T)r� )r/ )r� r� )r. r r' r' r) �minusc s z
Context.minusc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a� multiply multiplies two operands.
If either operand is a special value then the general rules apply.
Otherwise, the operands are multiplied together
('long multiplication'), resulting in a number which may be as long as
the sum of the lengths of the two operands.
>>> ExtendedContext.multiply(Decimal('1.20'), Decimal('3'))
Decimal('3.60')
>>> ExtendedContext.multiply(Decimal('7'), Decimal('3'))
Decimal('21')
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('0.8'))
Decimal('0.72')
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('-0'))
Decimal('-0.0')
>>> ExtendedContext.multiply(Decimal('654321'), Decimal('654321'))
Decimal('4.28135971E+11')
>>> ExtendedContext.multiply(7, 7)
Decimal('49')
>>> ExtendedContext.multiply(Decimal(7), 7)
Decimal('49')
>>> ExtendedContext.multiply(7, Decimal(7))
Decimal('49')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �multiplyt s
zContext.multiplyc C s t |dd�}|j| d�S )a" Returns the largest representable number smaller than a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> ExtendedContext.next_minus(Decimal('1'))
Decimal('0.999999999')
>>> c.next_minus(Decimal('1E-1007'))
Decimal('0E-1007')
>>> ExtendedContext.next_minus(Decimal('-1.00000003'))
Decimal('-1.00000004')
>>> c.next_minus(Decimal('Infinity'))
Decimal('9.99999999E+999')
>>> c.next_minus(1)
Decimal('0.999999999')
T)r� )r/ )r� r^ )r. r r' r' r) r^ � s zContext.next_minusc C s t |dd�}|j| d�S )a Returns the smallest representable number larger than a.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> ExtendedContext.next_plus(Decimal('1'))
Decimal('1.00000001')
>>> c.next_plus(Decimal('-1E-1007'))
Decimal('-0E-1007')
>>> ExtendedContext.next_plus(Decimal('-1.00000003'))
Decimal('-1.00000002')
>>> c.next_plus(Decimal('-Infinity'))
Decimal('-9.99999999E+999')
>>> c.next_plus(1)
Decimal('1.00000001')
T)r� )r/ )r� r_ )r. r r' r' r) r_ � s zContext.next_plusc C s t |dd�}|j|| d�S )a� Returns the number closest to a, in direction towards b.
The result is the closest representable number from the first
operand (but not the first operand) that is in the direction
towards the second operand, unless the operands have the same
value.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.next_toward(Decimal('1'), Decimal('2'))
Decimal('1.00000001')
>>> c.next_toward(Decimal('-1E-1007'), Decimal('1'))
Decimal('-0E-1007')
>>> c.next_toward(Decimal('-1.00000003'), Decimal('0'))
Decimal('-1.00000002')
>>> c.next_toward(Decimal('1'), Decimal('0'))
Decimal('0.999999999')
>>> c.next_toward(Decimal('1E-1007'), Decimal('-100'))
Decimal('0E-1007')
>>> c.next_toward(Decimal('-1.00000003'), Decimal('-10'))
Decimal('-1.00000004')
>>> c.next_toward(Decimal('0.00'), Decimal('-0.0000'))
Decimal('-0.00')
>>> c.next_toward(0, 1)
Decimal('1E-1007')
>>> c.next_toward(Decimal(0), 1)
Decimal('1E-1007')
>>> c.next_toward(0, Decimal(1))
Decimal('1E-1007')
T)r� )r/ )r� r` )r. r rS r' r' r) r` � s zContext.next_towardc C s t |dd�}|j| d�S )a� normalize reduces an operand to its simplest form.
Essentially a plus operation with all trailing zeros removed from the
result.
>>> ExtendedContext.normalize(Decimal('2.1'))
Decimal('2.1')
>>> ExtendedContext.normalize(Decimal('-2.0'))
Decimal('-2')
>>> ExtendedContext.normalize(Decimal('1.200'))
Decimal('1.2')
>>> ExtendedContext.normalize(Decimal('-120'))
Decimal('-1.2E+2')
>>> ExtendedContext.normalize(Decimal('120.00'))
Decimal('1.2E+2')
>>> ExtendedContext.normalize(Decimal('0.00'))
Decimal('0')
>>> ExtendedContext.normalize(6)
Decimal('6')
T)r� )r/ )r� r! )r. r r' r' r) r! � s zContext.normalizec C s t |dd�}|j| d�S )a� Returns an indication of the class of the operand.
The class is one of the following strings:
-sNaN
-NaN
-Infinity
-Normal
-Subnormal
-Zero
+Zero
+Subnormal
+Normal
+Infinity
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.number_class(Decimal('Infinity'))
'+Infinity'
>>> c.number_class(Decimal('1E-10'))
'+Normal'
>>> c.number_class(Decimal('2.50'))
'+Normal'
>>> c.number_class(Decimal('0.1E-999'))
'+Subnormal'
>>> c.number_class(Decimal('0'))
'+Zero'
>>> c.number_class(Decimal('-0'))
'-Zero'
>>> c.number_class(Decimal('-0.1E-999'))
'-Subnormal'
>>> c.number_class(Decimal('-1E-10'))
'-Normal'
>>> c.number_class(Decimal('-2.50'))
'-Normal'
>>> c.number_class(Decimal('-Infinity'))
'-Infinity'
>>> c.number_class(Decimal('NaN'))
'NaN'
>>> c.number_class(Decimal('-NaN'))
'NaN'
>>> c.number_class(Decimal('sNaN'))
'sNaN'
>>> c.number_class(123)
'+Normal'
T)r� )r/ )r� rb )r. r r' r' r) rb � s / zContext.number_classc C s t |dd�}|j| d�S )a� Plus corresponds to unary prefix plus in Python.
The operation is evaluated using the same rules as add; the
operation plus(a) is calculated as add('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedContext.plus(Decimal('1.3'))
Decimal('1.3')
>>> ExtendedContext.plus(Decimal('-1.3'))
Decimal('-1.3')
>>> ExtendedContext.plus(-1)
Decimal('-1')
T)r� )r/ )r� r� )r. r r' r' r) �plus) s z Context.plusc C s: t |dd�}|j||| d�}|tkr2td| ��n|S dS )a Raises a to the power of b, to modulo if given.
With two arguments, compute a**b. If a is negative then b
must be integral. The result will be inexact unless b is
integral and the result is finite and can be expressed exactly
in 'precision' digits.
With three arguments, compute (a**b) % modulo. For the
three argument form, the following restrictions on the
arguments hold:
- all three arguments must be integral
- b must be nonnegative
- at least one of a or b must be nonzero
- modulo must be nonzero and have at most 'precision' digits
The result of pow(a, b, modulo) is identical to the result
that would be obtained by computing (a**b) % modulo with
unbounded precision, but is computed more efficiently. It is
always exact.
>>> c = ExtendedContext.copy()
>>> c.Emin = -999
>>> c.Emax = 999
>>> c.power(Decimal('2'), Decimal('3'))
Decimal('8')
>>> c.power(Decimal('-2'), Decimal('3'))
Decimal('-8')
>>> c.power(Decimal('2'), Decimal('-3'))
Decimal('0.125')
>>> c.power(Decimal('1.7'), Decimal('8'))
Decimal('69.7575744')
>>> c.power(Decimal('10'), Decimal('0.301029996'))
Decimal('2.00000000')
>>> c.power(Decimal('Infinity'), Decimal('-1'))
Decimal('0')
>>> c.power(Decimal('Infinity'), Decimal('0'))
Decimal('1')
>>> c.power(Decimal('Infinity'), Decimal('1'))
Decimal('Infinity')
>>> c.power(Decimal('-Infinity'), Decimal('-1'))
Decimal('-0')
>>> c.power(Decimal('-Infinity'), Decimal('0'))
Decimal('1')
>>> c.power(Decimal('-Infinity'), Decimal('1'))
Decimal('-Infinity')
>>> c.power(Decimal('-Infinity'), Decimal('2'))
Decimal('Infinity')
>>> c.power(Decimal('0'), Decimal('0'))
Decimal('NaN')
>>> c.power(Decimal('3'), Decimal('7'), Decimal('16'))
Decimal('11')
>>> c.power(Decimal('-3'), Decimal('7'), Decimal('16'))
Decimal('-11')
>>> c.power(Decimal('-3'), Decimal('8'), Decimal('16'))
Decimal('1')
>>> c.power(Decimal('3'), Decimal('7'), Decimal('-16'))
Decimal('11')
>>> c.power(Decimal('23E12345'), Decimal('67E189'), Decimal('123456789'))
Decimal('11729830')
>>> c.power(Decimal('-0'), Decimal('17'), Decimal('1729'))
Decimal('-0')
>>> c.power(Decimal('-23'), Decimal('0'), Decimal('65537'))
Decimal('1')
>>> ExtendedContext.power(7, 7)
Decimal('823543')
>>> ExtendedContext.power(Decimal(7), 7)
Decimal('823543')
>>> ExtendedContext.power(7, Decimal(7), 2)
Decimal('1')
T)r� )r/ z Unable to convert %s to DecimalN)r� r r� rr )r. r rS r� r� r' r' r) �power: s
I z
Context.powerc C s t |dd�}|j|| d�S )a
Returns a value equal to 'a' (rounded), having the exponent of 'b'.
The coefficient of the result is derived from that of the left-hand
operand. It may be rounded using the current rounding setting (if the
exponent is being increased), multiplied by a positive power of ten (if
the exponent is being decreased), or is unchanged (if the exponent is
already equal to that of the right-hand operand).
Unlike other operations, if the length of the coefficient after the
quantize operation would be greater than precision then an Invalid
operation condition is raised. This guarantees that, unless there is
an error condition, the exponent of the result of a quantize is always
equal to that of the right-hand operand.
Also unlike other operations, quantize will never raise Underflow, even
if the result is subnormal and inexact.
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.001'))
Decimal('2.170')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.01'))
Decimal('2.17')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.1'))
Decimal('2.2')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+0'))
Decimal('2')
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+1'))
Decimal('0E+1')
>>> ExtendedContext.quantize(Decimal('-Inf'), Decimal('Infinity'))
Decimal('-Infinity')
>>> ExtendedContext.quantize(Decimal('2'), Decimal('Infinity'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('-0.1'), Decimal('1'))
Decimal('-0')
>>> ExtendedContext.quantize(Decimal('-0'), Decimal('1e+5'))
Decimal('-0E+5')
>>> ExtendedContext.quantize(Decimal('+35236450.6'), Decimal('1e-2'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('-35236450.6'), Decimal('1e-2'))
Decimal('NaN')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-1'))
Decimal('217.0')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-0'))
Decimal('217')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+1'))
Decimal('2.2E+2')
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+2'))
Decimal('2E+2')
>>> ExtendedContext.quantize(1, 2)
Decimal('1')
>>> ExtendedContext.quantize(Decimal(1), 2)
Decimal('1')
>>> ExtendedContext.quantize(1, Decimal(2))
Decimal('1')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s 7 zContext.quantizec C s t d�S )zkJust returns 10, as this is Decimal, :)
>>> ExtendedContext.radix()
Decimal('10')
r� )r )r. r' r' r) rc � s z
Context.radixc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a Returns the remainder from integer division.
The result is the residue of the dividend after the operation of
calculating integer division as described for divide-integer, rounded
to precision digits if necessary. The sign of the result, if
non-zero, is the same as that of the original dividend.
This operation will fail under the same conditions as integer division
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedContext.remainder(Decimal('2.1'), Decimal('3'))
Decimal('2.1')
>>> ExtendedContext.remainder(Decimal('10'), Decimal('3'))
Decimal('1')
>>> ExtendedContext.remainder(Decimal('-10'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.remainder(Decimal('10.2'), Decimal('1'))
Decimal('0.2')
>>> ExtendedContext.remainder(Decimal('10'), Decimal('0.3'))
Decimal('0.1')
>>> ExtendedContext.remainder(Decimal('3.6'), Decimal('1.3'))
Decimal('1.0')
>>> ExtendedContext.remainder(22, 6)
Decimal('4')
>>> ExtendedContext.remainder(Decimal(22), 6)
Decimal('4')
>>> ExtendedContext.remainder(22, Decimal(6))
Decimal('4')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) r� � s
zContext.remainderc C s t |dd�}|j|| d�S )aG Returns to be "a - b * n", where n is the integer nearest the exact
value of "x / b" (if two integers are equally near then the even one
is chosen). If the result is equal to 0 then its sign will be the
sign of a.
This operation will fail under the same conditions as integer division
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedContext.remainder_near(Decimal('2.1'), Decimal('3'))
Decimal('-0.9')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('6'))
Decimal('-2')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('3'))
Decimal('1')
>>> ExtendedContext.remainder_near(Decimal('-10'), Decimal('3'))
Decimal('-1')
>>> ExtendedContext.remainder_near(Decimal('10.2'), Decimal('1'))
Decimal('0.2')
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('0.3'))
Decimal('0.1')
>>> ExtendedContext.remainder_near(Decimal('3.6'), Decimal('1.3'))
Decimal('-0.3')
>>> ExtendedContext.remainder_near(3, 11)
Decimal('3')
>>> ExtendedContext.remainder_near(Decimal(3), 11)
Decimal('3')
>>> ExtendedContext.remainder_near(3, Decimal(11))
Decimal('3')
T)r� )r/ )r� r� )r. r rS r' r' r) r� � s zContext.remainder_nearc C s t |dd�}|j|| d�S )aN Returns a rotated copy of a, b times.
The coefficient of the result is a rotated copy of the digits in
the coefficient of the first operand. The number of places of
rotation is taken from the absolute value of the second operand,
with the rotation being to the left if the second operand is
positive or to the right otherwise.
>>> ExtendedContext.rotate(Decimal('34'), Decimal('8'))
Decimal('400000003')
>>> ExtendedContext.rotate(Decimal('12'), Decimal('9'))
Decimal('12')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('-2'))
Decimal('891234567')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('0'))
Decimal('123456789')
>>> ExtendedContext.rotate(Decimal('123456789'), Decimal('+2'))
Decimal('345678912')
>>> ExtendedContext.rotate(1333333, 1)
Decimal('13333330')
>>> ExtendedContext.rotate(Decimal(1333333), 1)
Decimal('13333330')
>>> ExtendedContext.rotate(1333333, Decimal(1))
Decimal('13333330')
T)r� )r/ )r� rg )r. r rS r' r' r) rg s zContext.rotatec C s t |dd�}|j|�S )a� Returns True if the two operands have the same exponent.
The result is never affected by either the sign or the coefficient of
either operand.
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.001'))
False
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.01'))
True
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('1'))
False
>>> ExtendedContext.same_quantum(Decimal('Inf'), Decimal('-Inf'))
True
>>> ExtendedContext.same_quantum(10000, -1)
True
>>> ExtendedContext.same_quantum(Decimal(10000), -1)
True
>>> ExtendedContext.same_quantum(10000, Decimal(-1))
True
T)r� )r� r$ )r. r rS r' r' r) r$ 1 s zContext.same_quantumc C s t |dd�}|j|| d�S )a3 Returns the first operand after adding the second value its exp.
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('-2'))
Decimal('0.0750')
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('0'))
Decimal('7.50')
>>> ExtendedContext.scaleb(Decimal('7.50'), Decimal('3'))
Decimal('7.50E+3')
>>> ExtendedContext.scaleb(1, 4)
Decimal('1E+4')
>>> ExtendedContext.scaleb(Decimal(1), 4)
Decimal('1E+4')
>>> ExtendedContext.scaleb(1, Decimal(4))
Decimal('1E+4')
T)r� )r/ )r� rh )r. r rS r' r' r) rh I s zContext.scalebc C s t |dd�}|j|| d�S )a{ Returns a shifted copy of a, b times.
The coefficient of the result is a shifted copy of the digits
in the coefficient of the first operand. The number of places
to shift is taken from the absolute value of the second operand,
with the shift being to the left if the second operand is
positive or to the right otherwise. Digits shifted into the
coefficient are zeros.
>>> ExtendedContext.shift(Decimal('34'), Decimal('8'))
Decimal('400000000')
>>> ExtendedContext.shift(Decimal('12'), Decimal('9'))
Decimal('0')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('-2'))
Decimal('1234567')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('0'))
Decimal('123456789')
>>> ExtendedContext.shift(Decimal('123456789'), Decimal('+2'))
Decimal('345678900')
>>> ExtendedContext.shift(88888888, 2)
Decimal('888888800')
>>> ExtendedContext.shift(Decimal(88888888), 2)
Decimal('888888800')
>>> ExtendedContext.shift(88888888, Decimal(2))
Decimal('888888800')
T)r� )r/ )r� r� )r. r rS r' r' r) r� \ s z
Context.shiftc C s t |dd�}|j| d�S )a� Square root of a non-negative number to context precision.
If the result must be inexact, it is rounded using the round-half-even
algorithm.
>>> ExtendedContext.sqrt(Decimal('0'))
Decimal('0')
>>> ExtendedContext.sqrt(Decimal('-0'))
Decimal('-0')
>>> ExtendedContext.sqrt(Decimal('0.39'))
Decimal('0.624499800')
>>> ExtendedContext.sqrt(Decimal('100'))
Decimal('10')
>>> ExtendedContext.sqrt(Decimal('1'))
Decimal('1')
>>> ExtendedContext.sqrt(Decimal('1.0'))
Decimal('1.0')
>>> ExtendedContext.sqrt(Decimal('1.00'))
Decimal('1.0')
>>> ExtendedContext.sqrt(Decimal('7'))
Decimal('2.64575131')
>>> ExtendedContext.sqrt(Decimal('10'))
Decimal('3.16227766')
>>> ExtendedContext.sqrt(2)
Decimal('1.41421356')
>>> ExtendedContext.prec
9
T)r� )r/ )r� r- )r. r r' r' r) r- z s z Context.sqrtc C s8 t |dd�}|j|| d�}|tkr0td| ��n|S dS )a& Return the difference between the two operands.
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.07'))
Decimal('0.23')
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.30'))
Decimal('0.00')
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('2.07'))
Decimal('-0.77')
>>> ExtendedContext.subtract(8, 5)
Decimal('3')
>>> ExtendedContext.subtract(Decimal(8), 5)
Decimal('3')
>>> ExtendedContext.subtract(8, Decimal(5))
Decimal('3')
T)r� )r/ z Unable to convert %s to DecimalN)r� r� r� rr )r. r rS r� r' r' r) �subtract� s
zContext.subtractc C s t |dd�}|j| d�S )a� Convert to a string, using engineering notation if an exponent is needed.
Engineering notation has an exponent which is a multiple of 3. This
can leave up to 3 digits to the left of the decimal place and may
require the addition of either one or two trailing zeros.
The operation is not affected by the context.
>>> ExtendedContext.to_eng_string(Decimal('123E+1'))
'1.23E+3'
>>> ExtendedContext.to_eng_string(Decimal('123E+3'))
'123E+3'
>>> ExtendedContext.to_eng_string(Decimal('123E-10'))
'12.3E-9'
>>> ExtendedContext.to_eng_string(Decimal('-123E-12'))
'-123E-12'
>>> ExtendedContext.to_eng_string(Decimal('7E-7'))
'700E-9'
>>> ExtendedContext.to_eng_string(Decimal('7E+1'))
'70'
>>> ExtendedContext.to_eng_string(Decimal('0E+1'))
'0.00E+3'
T)r� )r/ )r� r� )r. r r' r' r) r� � s zContext.to_eng_stringc C s t |dd�}|j| d�S )zyConverts a number to a string, using scientific notation.
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T)r� )r/ )r� r� )r. r r' r' r) �
to_sci_string� s zContext.to_sci_stringc C s t |dd�}|j| d�S )ak Rounds to an integer.
When the operand has a negative exponent, the result is the same
as using the quantize() operation using the given operand as the
left-hand-operand, 1E+0 as the right-hand-operand, and the precision
of the operand as the precision setting; Inexact and Rounded flags
are allowed in this operation. The rounding mode is taken from the
context.
>>> ExtendedContext.to_integral_exact(Decimal('2.1'))
Decimal('2')
>>> ExtendedContext.to_integral_exact(Decimal('100'))
Decimal('100')
>>> ExtendedContext.to_integral_exact(Decimal('100.0'))
Decimal('100')
>>> ExtendedContext.to_integral_exact(Decimal('101.5'))
Decimal('102')
>>> ExtendedContext.to_integral_exact(Decimal('-101.5'))
Decimal('-102')
>>> ExtendedContext.to_integral_exact(Decimal('10E+5'))
Decimal('1.0E+6')
>>> ExtendedContext.to_integral_exact(Decimal('7.89E+77'))
Decimal('7.89E+77')
>>> ExtendedContext.to_integral_exact(Decimal('-Inf'))
Decimal('-Infinity')
T)r� )r/ )r� r' )r. r r' r' r) r' � s zContext.to_integral_exactc C s t |dd�}|j| d�S )aL Rounds to an integer.
When the operand has a negative exponent, the result is the same
as using the quantize() operation using the given operand as the
left-hand-operand, 1E+0 as the right-hand-operand, and the precision
of the operand as the precision setting, except that no flags will
be set. The rounding mode is taken from the context.
>>> ExtendedContext.to_integral_value(Decimal('2.1'))
Decimal('2')
>>> ExtendedContext.to_integral_value(Decimal('100'))
Decimal('100')
>>> ExtendedContext.to_integral_value(Decimal('100.0'))
Decimal('100')
>>> ExtendedContext.to_integral_value(Decimal('101.5'))
Decimal('102')
>>> ExtendedContext.to_integral_value(Decimal('-101.5'))
Decimal('-102')
>>> ExtendedContext.to_integral_value(Decimal('10E+5'))
Decimal('1.0E+6')
>>> ExtendedContext.to_integral_value(Decimal('7.89E+77'))
Decimal('7.89E+77')
>>> ExtendedContext.to_integral_value(Decimal('-Inf'))
Decimal('-Infinity')
T)r� )r/ )r� r� )r. r r' r' r) r� � s zContext.to_integral_value) NNNNNNNNN)N)rQ )N)Xr1 r2 r3 r4 r� r� r� r� r� rj r� rI r� r( rH rl rd r\ r� r� r� r� r� r) r� r� rh r� r� r2 r� r3 r. r7 r� r� r� r8 r� r� r� rV r� r; r< r# r� r= r� r> r� r? r@ rH rK rL rV rX rY rW r� rZ r� r[ r� r� r^ r_ r` r! rb r� r� r� rc r� r� rg r$ rh r� r- r� r� r� r' r� r� r' r' r' r) r B s�
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ri c C s� | j |j k r|}| }n| }|}tt|j��}tt|j��}|j td|| d � }||j d |k rpd|_||_ | jd|j |j 9 _|j |_ | |fS )zcNormalizes op1, op2 to have the same exp and length of coefficient.
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r- r+ r� r� )rV rf r` rU r� )r� r� r@ Ztmpr� Ztmp_lenZ other_lenrV r' r' r) r� / s r� c C sb | dkr dS |dkr | d| S t t| ��}t|�t|jd�� }|| k rPdS | d| S dS )a Given integers n and e, return n * 10**e if it's an integer, else None.
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unnecessarily.
>>> _decimal_lshift_exact(3, 4)
30000
>>> _decimal_lshift_exact(300, -999999999) # returns None
r% r� rQ N)r` rh rf �rstrip)r5 r� Zstr_nZval_nr' r' r) r O s r c C sF | dks|dkrt d��d}x$||kr@||| | d? }}q W |S )z�Closest integer to the square root of the positive integer n. a is
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r% z3Both arguments to _sqrt_nearest should be positive.r- )rl )r5 r rS r' r' r) �
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r� c C s2 d|> | |? }}|d| |d @ |d@ |k S )z�Given an integer x and a nonnegative integer shift, return closest
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r- r+ r' )r r� rS r� r' r' r) �_rshift_nearests s r� c C s& t | |�\}}|d| |d@ |k S )zaClosest integer to a/b, a and b positive integers; rounds to even
in the case of a tie.
r+ r- )r� )r rS r� r� r' r' r) � _div_nearest{ s r� r c C s� | | }d}xn||kr*t |�|| > |ksF||krzt |�|| ? |krzt|| d> |t||t||� |� �}|d7 }qW tdtt|�� d| � }t||�}t||�}x0t|d dd�D ] }t||�t|| |� }q�W t|| |�S )a� Integer approximation to M*log(x/M), with absolute error boundable
in terms only of x/M.
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between the approximation and the exact result is at most 22. For
L = 8 and 1.0 <= x/M <= 10.0 the difference is at most 15. In
both cases these are upper bounds on the error; it will usually be
much smaller.r% r- r� r[ i����r� )rh r� r� r� rU rf r` r� ) r �M�Lr �R�TZyshift�wr� r' r' r) �_ilog� s
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10**(p-1) <= c <= 10**p, and
(c-1)*10**e < x**y < (c+1)*10**e
in other words, c*10**e is an approximation to x**y with p digits
of precision, and with an error in c of at most 1. (This is
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== 10**(p-1) we can only guarantee error < 10ulp.)
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sign: either '+', '-' or ' '
minimumwidth: nonnegative integer giving minimum width
zeropad: boolean, indicating whether to pad with zeros
thousands_sep: string to use as thousands separator, or ''
grouping: grouping for thousands separators, in format
used by localeconv
decimal_point: string to use for decimal point
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wave.cpython-36.pyc 0000644 00000042737 15033571514 0010155 0 ustar 00 3
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Stuff to parse WAVE files.
Usage.
Reading WAVE files:
f = wave.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for linear samples)
getcompname() -- returns human-readable version of
compression type ('not compressed' linear samples)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
is destroyed.
Writing WAVE files:
f = wave.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
The close() method is called automatically when the class instance
is destroyed.
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_nchannels -- the number of audio channels
available through the getnchannels() method
_nframes -- the number of audio frames
available through the getnframes() method
_sampwidth -- the number of bytes per audio sample
available through the getsampwidth() method
_framerate -- the sampling frequency
available through the getframerate() method
_comptype -- the AIFF-C compression type ('NONE' if AIFF)
available through the getcomptype() method
_compname -- the human-readable AIFF-C compression type
available through the getcomptype() method
_soundpos -- the position in the audio stream
available through the tell() method, set through the
setpos() method
These variables are used internally only:
_fmt_chunk_read -- 1 iff the FMT chunk has been read
_data_seek_needed -- 1 iff positioned correctly in audio
file for readframes()
_data_chunk -- instantiation of a chunk class for the DATA chunk
_framesize -- size of one frame in the file
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set through the setcomptype() or setparams() method
_compname -- the human-readable AIFF-C compression type
set through the setcomptype() or setparams() method
_nchannels -- the number of audio channels
set through the setnchannels() or setparams() method
_sampwidth -- the number of bytes per audio sample
set through the setsampwidth() or setparams() method
_framerate -- the sampling frequency
set through the setframerate() or setparams() method
_nframes -- the number of audio frames written to the header
set through the setnframes() or setparams() method
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_datalength -- the size of the audio samples written to the header
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getfullargspec() - same, with support for Python 3 features
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ast
~~~
The `ast` module helps Python applications to process trees of the Python
abstract syntax grammar. The abstract syntax itself might change with
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An abstract syntax tree can be generated by passing `ast.PyCF_ONLY_AST` as
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classes all inherit from `ast.AST`.
A modified abstract syntax tree can be compiled into a Python code object
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Additionally various helper functions are provided that make working with
the trees simpler. The main intention of the helper functions and this
module in general is to provide an easy to use interface for libraries
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:copyright: Copyright 2008 by Armin Ronacher.
:license: Python License.
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A :class:`NodeVisitor` subclass that walks the abstract syntax tree and
allows modification of nodes.
The `NodeTransformer` will walk the AST and use the return value of the
visitor methods to replace or remove the old node. If the return value of
the visitor method is ``None``, the node will be removed from its location,
otherwise it is replaced with the return value. The return value may be the
original node in which case no replacement takes place.
Here is an example transformer that rewrites all occurrences of name lookups
(``foo``) to ``data['foo']``::
class RewriteName(NodeTransformer):
def visit_Name(self, node):
return copy_location(Subscript(
value=Name(id='data', ctx=Load()),
slice=Index(value=Str(s=node.id)),
ctx=node.ctx
), node)
Keep in mind that if the node you're operating on has child nodes you must
either transform the child nodes yourself or call the :meth:`generic_visit`
method for the node first.
For nodes that were part of a collection of statements (that applies to all
statement nodes), the visitor may also return a list of nodes rather than
just a single node.
Usually you use the transformer like this::
node = YourTransformer().visit(node)
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def _test():
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_test()
Then running the module as a script will cause the examples in the
docstrings to get executed and verified:
python M.py
This won't display anything unless an example fails, in which case the
failing example(s) and the cause(s) of the failure(s) are printed to stdout
(why not stderr? because stderr is a lame hack <0.2 wink>), and the final
line of output is "Test failed.".
Run it with the -v switch instead:
python M.py -v
and a detailed report of all examples tried is printed to stdout, along
with assorted summaries at the end.
You can force verbose mode by passing "verbose=True" to testmod, or prohibit
it by passing "verbose=False". In either of those cases, sys.argv is not
examined by testmod.
There are a variety of other ways to run doctests, including integration
with the unittest framework, and support for running non-Python text
files containing doctests. There are also many ways to override parts
of doctest's default behaviors. See the Library Reference Manual for
details.
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Return the module specified by `module`. In particular:
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output. `Example` defines the following attributes:
- source: A single Python statement, always ending with a newline.
The constructor adds a newline if needed.
- want: The expected output from running the source code (either
from stdout, or a traceback in case of exception). `want` ends
with a newline unless it's empty, in which case it's an empty
string. The constructor adds a newline if needed.
- exc_msg: The exception message generated by the example, if
the example is expected to generate an exception; or `None` if
it is not expected to generate an exception. This exception
message is compared against the return value of
`traceback.format_exception_only()`. `exc_msg` ends with a
newline unless it's `None`. The constructor adds a newline
if needed.
- lineno: The line number within the DocTest string containing
this Example where the Example begins. This line number is
zero-based, with respect to the beginning of the DocTest.
- indent: The example's indentation in the DocTest string.
I.e., the number of space characters that precede the
example's first prompt.
- options: A dictionary mapping from option flags to True or
False, which is used to override default options for this
example. Any option flags not contained in this dictionary
are left at their default value (as specified by the
DocTestRunner's optionflags). By default, no options are set.
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A collection of doctest examples that should be run in a single
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the object whose docstring this DocTest was extracted from).
- filename: The name of the file that this DocTest was extracted
from, or `None` if the filename is unknown.
- lineno: The line number within filename where this DocTest
begins, or `None` if the line number is unavailable. This
line number is zero-based, with respect to the beginning of
the file.
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or `None` if the string is unavailable.
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Divide the given string into examples and intervening text,
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Extract all doctest examples from the given string, and
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Extract all doctest examples from the given string, and return
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and so the first interesting line is called "line 1" then.
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Given a regular expression match from `_EXAMPLE_RE` (`m`),
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Return a dictionary containing option overrides extracted from
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A class used to extract the DocTests that are relevant to a given
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object types: modules, functions, classes, methods, staticmethods,
classmethods, and properties.
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Create a new doctest finder.
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function that should be used to create new DocTest objects (or
objects that implement the same interface as DocTest). The
signature for this factory function should match the signature
of the DocTest constructor.
If the optional argument `recurse` is false, then `find` will
only examine the given object, and not any contained objects.
If the optional argument `exclude_empty` is false, then `find`
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Return a list of the DocTests that are defined by the given
object's docstring, or by any of its contained objects'
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the test finder will attempt to automatically determine the
correct module. The object's module is used:
- As a default namespace, if `globs` is not specified.
- To prevent the DocTestFinder from extracting DocTests
from objects that are imported from other modules.
- To find the name of the file containing the object.
- To help find the line number of the object within its
file.
Contained objects whose module does not match `module` are ignored.
If `module` is False, no attempt to find the module will be made.
This is obscure, of use mostly in tests: if `module` is False, or
is None but cannot be found automatically, then all objects are
considered to belong to the (non-existent) module, so all contained
objects will (recursively) be searched for doctests.
The globals for each DocTest is formed by combining `globs`
and `extraglobs` (bindings in `extraglobs` override bindings
in `globs`). A new copy of the globals dictionary is created
for each DocTest. If `globs` is not specified, then it
defaults to the module's `__dict__`, if specified, or {}
otherwise. If `extraglobs` is not specified, then it defaults
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Find tests for the given object and any contained objects, and
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Return a DocTest for the given object, if it defines a docstring;
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Return a line number of the given object's docstring. Note:
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A class used to run DocTest test cases, and accumulate statistics.
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returns a tuple `(f, t)`, where `t` is the number of test cases
tried, and `f` is the number of test cases that failed.
>>> tests = DocTestFinder().find(_TestClass)
>>> runner = DocTestRunner(verbose=False)
>>> tests.sort(key = lambda test: test.name)
>>> for test in tests:
... print(test.name, '->', runner.run(test))
_TestClass -> TestResults(failed=0, attempted=2)
_TestClass.__init__ -> TestResults(failed=0, attempted=2)
_TestClass.get -> TestResults(failed=0, attempted=2)
_TestClass.square -> TestResults(failed=0, attempted=1)
The `summarize` method prints a summary of all the test cases that
have been run by the runner, and returns an aggregated `(f, t)`
tuple:
>>> runner.summarize(verbose=1)
4 items passed all tests:
2 tests in _TestClass
2 tests in _TestClass.__init__
2 tests in _TestClass.get
1 tests in _TestClass.square
7 tests in 4 items.
7 passed and 0 failed.
Test passed.
TestResults(failed=0, attempted=7)
The aggregated number of tried examples and failed examples is
also available via the `tries` and `failures` attributes:
>>> runner.tries
7
>>> runner.failures
0
The comparison between expected outputs and actual outputs is done
by an `OutputChecker`. This comparison may be customized with a
number of option flags; see the documentation for `testmod` for
more information. If the option flags are insufficient, then the
comparison may also be customized by passing a subclass of
`OutputChecker` to the constructor.
The test runner's display output can be controlled in two ways.
First, an output function (`out) can be passed to
`TestRunner.run`; this function will be called with strings that
should be displayed. It defaults to `sys.stdout.write`. If
capturing the output is not sufficient, then the display output
can be also customized by subclassing DocTestRunner, and
overriding the methods `report_start`, `report_success`,
`report_unexpected_exception`, and `report_failure`.
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Create a new test runner.
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outputs of doctest examples.
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only failures if false; by default, it's true iff '-v' is in
sys.argv.
Optional argument `optionflags` can be used to control how the
test runner compares expected output to actual output, and how
it displays failures. See the documentation for `testmod` for
more information.
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Run the examples in `test`. Write the outcome of each example
with one of the `DocTestRunner.report_*` methods, using the
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`(f, t)`, where `t` is the number of examples tried, and `f`
is the number of examples that failed. The examples are run
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Run the examples in `test`, and display the results using the
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be cleared after the test runs, to help with garbage
collection. If you would like to examine the namespace after
the test completes, then use `clear_globs=False`.
`compileflags` gives the set of flags that should be used by
the Python compiler when running the examples. If not
specified, then it will default to the set of future-import
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Print a summary of all the test cases that have been run by
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A class used to check the whether the actual output from a doctest
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Return True iff the actual output from an example (`got`)
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Return a string describing the differences between the
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?c @ s e Zd ZdZdd� Zdd� ZdS )r z�A DocTest example has failed in debugging mode.
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dd�Zdd� Zdd � ZdS ) r a� Run doc tests but raise an exception as soon as there is a failure.
If an unexpected exception occurs, an UnexpectedException is raised.
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>>> runner = DebugRunner(verbose=False)
>>> test = DocTestParser().get_doctest('>>> raise KeyError\n42',
... {}, 'foo', 'foo.py', 0)
>>> try:
... runner.run(test)
... except UnexpectedException as f:
... failure = f
>>> failure.test is test
True
>>> failure.example.want
'42\n'
>>> exc_info = failure.exc_info
>>> raise exc_info[1] # Already has the traceback
Traceback (most recent call last):
...
KeyError
We wrap the original exception to give the calling application
access to the test and example information.
If the output doesn't match, then a DocTestFailure is raised:
>>> test = DocTestParser().get_doctest('''
... >>> x = 1
... >>> x
... 2
... ''', {}, 'foo', 'foo.py', 0)
>>> try:
... runner.run(test)
... except DocTestFailure as f:
... failure = f
DocTestFailure objects provide access to the test:
>>> failure.test is test
True
As well as to the example:
>>> failure.example.want
'2\n'
and the actual output:
>>> failure.got
'1\n'
If a failure or error occurs, the globals are left intact:
>>> del test.globs['__builtins__']
>>> test.globs
{'x': 1}
>>> test = DocTestParser().get_doctest('''
... >>> x = 2
... >>> raise KeyError
... ''', {}, 'foo', 'foo.py', 0)
>>> runner.run(test)
Traceback (most recent call last):
...
doctest.UnexpectedException: <DocTest foo from foo.py:0 (2 examples)>
>>> del test.globs['__builtins__']
>>> test.globs
{'x': 2}
But the globals are cleared if there is no error:
>>> test = DocTestParser().get_doctest('''
... >>> x = 2
... ''', {}, 'foo', 'foo.py', 0)
>>> runner.run(test)
TestResults(failed=0, attempted=1)
>>> test.globs
{}
NTc C s$ t j| |||d�}|r |jj� |S )NF)r r@ r0 r< )rf r r# r� r? �rr+ r+ r, r@ . s
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m=None, name=None, globs=None, verbose=None, report=True,
optionflags=0, extraglobs=None, raise_on_error=False,
exclude_empty=False
Test examples in docstrings in functions and classes reachable
from module m (or the current module if m is not supplied), starting
with m.__doc__.
Also test examples reachable from dict m.__test__ if it exists and is
not None. m.__test__ maps names to functions, classes and strings;
function and class docstrings are tested even if the name is private;
strings are tested directly, as if they were docstrings.
Return (#failures, #tests).
See help(doctest) for an overview.
Optional keyword arg "name" gives the name of the module; by default
use m.__name__.
Optional keyword arg "globs" gives a dict to be used as the globals
when executing examples; by default, use m.__dict__. A copy of this
dict is actually used for each docstring, so that each docstring's
examples start with a clean slate.
Optional keyword arg "extraglobs" gives a dictionary that should be
merged into the globals that are used to execute examples. By
default, no extra globals are used. This is new in 2.4.
Optional keyword arg "verbose" prints lots of stuff if true, prints
only failures if false; by default, it's true iff "-v" is in sys.argv.
Optional keyword arg "report" prints a summary at the end when true,
else prints nothing at the end. In verbose mode, the summary is
detailed, else very brief (in fact, empty if all tests passed).
Optional keyword arg "optionflags" or's together module constants,
and defaults to 0. This is new in 2.3. Possible values (see the
docs for details):
DONT_ACCEPT_TRUE_FOR_1
DONT_ACCEPT_BLANKLINE
NORMALIZE_WHITESPACE
ELLIPSIS
SKIP
IGNORE_EXCEPTION_DETAIL
REPORT_UDIFF
REPORT_CDIFF
REPORT_NDIFF
REPORT_ONLY_FIRST_FAILURE
Optional keyword arg "raise_on_error" raises an exception on the
first unexpected exception or failure. This allows failures to be
post-mortem debugged.
Advanced tomfoolery: testmod runs methods of a local instance of
class doctest.Tester, then merges the results into (or creates)
global Tester instance doctest.master. Methods of doctest.master
can be called directly too, if you want to do something unusual.
Passing report=0 to testmod is especially useful then, to delay
displaying a summary. Invoke doctest.master.summarize(verbose)
when you're done fiddling.
Nr� z testmod: module required; %r)r� )r� r
)r0 r� )r= r> r. r6 r7 rA r5 r r r rr r@ rB �masterrD r% r r ) r� r* r0 r� �reportr
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c C s� |r| rt d��t| ||| p d�\} } |dkr<tjj| �}|dkrJi }n|j� }|dk rd|j|� d|krtd|d< | r�t||d�}
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Test examples in the given file. Return (#failures, #tests).
Optional keyword arg "module_relative" specifies how filenames
should be interpreted:
- If "module_relative" is True (the default), then "filename"
specifies a module-relative path. By default, this path is
relative to the calling module's directory; but if the
"package" argument is specified, then it is relative to that
package. To ensure os-independence, "filename" should use
"/" characters to separate path segments, and should not
be an absolute path (i.e., it may not begin with "/").
- If "module_relative" is False, then "filename" specifies an
os-specific path. The path may be absolute or relative (to
the current working directory).
Optional keyword arg "name" gives the name of the test; by default
use the file's basename.
Optional keyword argument "package" is a Python package or the
name of a Python package whose directory should be used as the
base directory for a module relative filename. If no package is
specified, then the calling module's directory is used as the base
directory for module relative filenames. It is an error to
specify "package" if "module_relative" is False.
Optional keyword arg "globs" gives a dict to be used as the globals
when executing examples; by default, use {}. A copy of this dict
is actually used for each docstring, so that each docstring's
examples start with a clean slate.
Optional keyword arg "extraglobs" gives a dictionary that should be
merged into the globals that are used to execute examples. By
default, no extra globals are used.
Optional keyword arg "verbose" prints lots of stuff if true, prints
only failures if false; by default, it's true iff "-v" is in sys.argv.
Optional keyword arg "report" prints a summary at the end when true,
else prints nothing at the end. In verbose mode, the summary is
detailed, else very brief (in fact, empty if all tests passed).
Optional keyword arg "optionflags" or's together module constants,
and defaults to 0. Possible values (see the docs for details):
DONT_ACCEPT_TRUE_FOR_1
DONT_ACCEPT_BLANKLINE
NORMALIZE_WHITESPACE
ELLIPSIS
SKIP
IGNORE_EXCEPTION_DETAIL
REPORT_UDIFF
REPORT_CDIFF
REPORT_NDIFF
REPORT_ONLY_FIRST_FAILURE
Optional keyword arg "raise_on_error" raises an exception on the
first unexpected exception or failure. This allows failures to be
post-mortem debugged.
Optional keyword arg "parser" specifies a DocTestParser (or
subclass) that should be used to extract tests from the files.
Optional keyword arg "encoding" specifies an encoding that should
be used to convert the file to unicode.
Advanced tomfoolery: testmod runs methods of a local instance of
class doctest.Tester, then merges the results into (or creates)
global Tester instance doctest.master. Methods of doctest.master
can be called directly too, if you want to do something unusual.
Passing report=0 to testmod is especially useful then, to delay
displaying a summary. Invoke doctest.master.summarize(verbose)
when you're done fiddling.
z8Package may only be specified for module-relative paths.zutf-8Nr5 r� )r� r
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Test examples in the given object's docstring (`f`), using `globs`
as globals. Optional argument `name` is used in failure messages.
If the optional argument `verbose` is true, then generate output
even if there are no failures.
`compileflags` gives the set of flags that should be used by the
Python compiler when running the examples. If not specified, then
it will default to the set of future-import flags that apply to
`globs`.
Optional keyword arg `optionflags` specifies options for the
testing and output. See the documentation for `testmod` for more
information.
F)r� r� )r� r
)r0 )r# N)r r rr r@ ) rT r0 r� r* r# r
rV rW r r+ r+ r, r & s c C s" | t @ | krtd| ��t}| a|S )a? Sets the unittest option flags.
The old flag is returned so that a runner could restore the old
value if it wished to:
>>> import doctest
>>> old = doctest._unittest_reportflags
>>> doctest.set_unittest_reportflags(REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE) == old
True
>>> doctest._unittest_reportflags == (REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE)
True
Only reporting flags can be set:
>>> doctest.set_unittest_reportflags(ELLIPSIS)
Traceback (most recent call last):
...
ValueError: ('Only reporting flags allowed', 8)
>>> doctest.set_unittest_reportflags(old) == (REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE)
True
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zDocTestCase.format_failurec C s6 | j � t| j| jdd�}|j| jdd� | j� dS )a� Run the test case without results and without catching exceptions
The unit test framework includes a debug method on test cases
and test suites to support post-mortem debugging. The test code
is run in such a way that errors are not caught. This way a
caller can catch the errors and initiate post-mortem debugging.
The DocTestCase provides a debug method that raises
UnexpectedException errors if there is an unexpected
exception:
>>> test = DocTestParser().get_doctest('>>> raise KeyError\n42',
... {}, 'foo', 'foo.py', 0)
>>> case = DocTestCase(test)
>>> try:
... case.debug()
... except UnexpectedException as f:
... failure = f
The UnexpectedException contains the test, the example, and
the original exception:
>>> failure.test is test
True
>>> failure.example.want
'42\n'
>>> exc_info = failure.exc_info
>>> raise exc_info[1] # Already has the traceback
Traceback (most recent call last):
...
KeyError
If the output doesn't match, then a DocTestFailure is raised:
>>> test = DocTestParser().get_doctest('''
... >>> x = 1
... >>> x
... 2
... ''', {}, 'foo', 'foo.py', 0)
>>> case = DocTestCase(test)
>>> try:
... case.debug()
... except DocTestFailure as f:
... failure = f
DocTestFailure objects provide access to the test:
>>> failure.test is test
True
As well as to the example:
>>> failure.example.want
'2\n'
and the actual output:
>>> failure.got
'1\n'
F)r
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B zDocTestCase.debugc C s | j jS )N)rb r* )rf r+ r+ r, r� � s zDocTestCase.idc C sP t | �t |�k rtS | j|jkoN| j|jkoN| j|jkoN| j|jkoN| j|jkS )N)r� r� rb r` rc rd ra )rf r� r+ r+ r, r� � s zDocTestCase.__eq__c C s t | j| j| j| jf�S )N)r� r` rc rd ra )rf r+ r+ r, r� � s zDocTestCase.__hash__c C s, | j jjd�}d|d dj|d d� �f S )Nr~ z%s (%s)r& rm rm )rb r* ro r� )rf r* r+ r+ r, r� � s zDocTestCase.__repr__c C s d| j j S )Nz Doctest: )rb r* )rf r+ r+ r, �shortDescription s z DocTestCase.shortDescription)r" NNN)r5 rk rl r� re rf ri rg r! r� r� r� r� rQ rk r+ r+ r+ r, r] g s
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_DocTestSuitec C s d S )Nr+ )rf �indexr+ r+ r, �_removeTestAtIndex s z _DocTestSuite._removeTestAtIndexN)r5 rk rl rp r+ r+ r+ r, rn s rn c K s� |dkrt � }t| �} |j| ||d�}| rPtjjdkrPt� }|jt| �� |S |j � t� }x\|D ]T}t
|j �dkrxqd|j s�| j
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Convert doctest tests for a module to a unittest test suite.
This converts each documentation string in a module that
contains doctest tests to a unittest test case. If any of the
tests in a doc string fail, then the test case fails. An exception
is raised showing the name of the file containing the test and a
(sometimes approximate) line number.
The `module` argument provides the module to be tested. The argument
can be either a module or a module name.
If no argument is given, the calling module is used.
A number of options may be provided as keyword arguments:
setUp
A set-up function. This is called before running the
tests in each file. The setUp function will be passed a DocTest
object. The setUp function can access the test globals as the
globs attribute of the test passed.
tearDown
A tear-down function. This is called after running the
tests in each file. The tearDown function will be passed a DocTest
object. The tearDown function can access the test globals as the
globs attribute of the test passed.
globs
A dictionary containing initial global variables for the tests.
optionflags
A set of doctest option flags expressed as an integer.
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dg�ZReSedI��rejTZUnejVZUG dJd� d�ZWdKdL� ZXeYdMk�rFeX� dS )NaQ TELNET client class.
Based on RFC 854: TELNET Protocol Specification, by J. Postel and
J. Reynolds
Example:
>>> from telnetlib import Telnet
>>> tn = Telnet('www.python.org', 79) # connect to finger port
>>> tn.write(b'guido\r\n')
>>> print(tn.read_all())
Login Name TTY Idle When Where
guido Guido van Rossum pts/2 <Dec 2 11:10> snag.cnri.reston..
>>>
Note that read_all() won't read until eof -- it just reads some data
-- but it guarantees to read at least one byte unless EOF is hit.
It is possible to pass a Telnet object to a selector in order to wait until
more data is available. Note that in this case, read_eager() may return b''
even if there was data on the socket, because the protocol negotiation may have
eaten the data. This is why EOFError is needed in some cases to distinguish
between "no data" and "connection closed" (since the socket also appears ready
for reading when it is closed).
To do:
- option negotiation
- timeout should be intrinsic to the connection object instead of an
option on one of the read calls only
� N)� monotonic�Telnet� � � � � � �� �� �� �� �� � � � � � � � � � � � � � � � �
� � �
� � � � � � � � � � � � � � � � � � �! �" �# �$ �% �& �' �( �) �* �+ �, �- �. �/ �0 �1 � � � � PollSelectorc @ s e Zd ZdZddejfdd�Zdejfdd�Zdd � Zd
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An instance of this class represents a connection to a telnet
server. The instance is initially not connected; the open()
method must be used to establish a connection. Alternatively, the
host name and optional port number can be passed to the
constructor, too.
Don't try to reopen an already connected instance.
This class has many read_*() methods. Note that some of them
raise EOFError when the end of the connection is read, because
they can return an empty string for other reasons. See the
individual doc strings.
read_until(expected, [timeout])
Read until the expected string has been seen, or a timeout is
hit (default is no timeout); may block.
read_all()
Read all data until EOF; may block.
read_some()
Read at least one byte or EOF; may block.
read_very_eager()
Read all data available already queued or on the socket,
without blocking.
read_eager()
Read either data already queued or some data available on the
socket, without blocking.
read_lazy()
Read all data in the raw queue (processing it first), without
doing any socket I/O.
read_very_lazy()
Reads all data in the cooked queue, without doing any socket
I/O.
read_sb_data()
Reads available data between SB ... SE sequence. Don't block.
set_option_negotiation_callback(callback)
Each time a telnet option is read on the input flow, this callback
(if set) is called with the following parameters :
callback(telnet socket, command, option)
option will be chr(0) when there is no option.
No other action is done afterwards by telnetlib.
Nr c C sh t | _|| _|| _|| _d| _d| _d| _d| _d| _ d| _
d| _ d| _ d| _
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and timeout are optional.
N� r )�
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debuglevel�host�port�timeout�sock�rawq�irawq�cookedq�eof�iacseq�sb�sbdataq�option_callback�open)�selfrL rM rN � rZ �!/usr/lib64/python3.6/telnetlib.py�__init__� s zTelnet.__init__c C s6 d| _ |st}|| _|| _|| _tj||f|�| _dS )z�Connect to a host.
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Don't try to reopen an already connected instance.
r N)rS � TELNET_PORTrL rM rN �socketZcreate_connectionrO )rY rL rM rN rZ rZ r[ rX � s z Telnet.openc C s | j � dS )z#Destructor -- close the connection.N)�close)rY rZ rZ r[ �__del__� s zTelnet.__del__c G s@ | j dkr<td| j| jf dd� |r4t|| � nt|� dS )z�Print a debug message, when the debug level is > 0.
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left_list, right_list: The files in dir1 and dir2,
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common: a list of names in both dir1 and dir2.
left_only, right_only: names only in dir1, dir2.
common_dirs: subdirectories in both dir1 and dir2.
common_files: files in both dir1 and dir2.
common_funny: names in both dir1 and dir2 where the type differs between
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same_files: list of identical files.
diff_files: list of filenames which differ.
funny_files: list of files which could not be compared.
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�rX Y nX dS )&a� An RFC 5321 smtp proxy with optional RFC 1870 and RFC 6531 extensions.
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Options:
--nosetuid
-n
This program generally tries to setuid `nobody', unless this flag is
set. The setuid call will fail if this program is not run as root (in
which case, use this flag).
--version
-V
Print the version number and exit.
--class classname
-c classname
Use `classname' as the concrete SMTP proxy class. Uses `PureProxy' by
default.
--size limit
-s limit
Restrict the total size of the incoming message to "limit" number of
bytes via the RFC 1870 SIZE extension. Defaults to 33554432 bytes.
--smtputf8
-u
Enable the SMTPUTF8 extension and behave as an RFC 6531 smtp proxy.
--debug
-d
Turn on debugging prints.
--help
-h
Print this message and exit.
Version: %(__version__)s
If localhost is not given then `localhost' is used, and if localport is not
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channel_classr3 Z_mapr4 r5 )r r1 r2 Zchannelr r r �handle_accepted� s zSMTPServer.handle_acceptedc K s t �dS )a Override this abstract method to handle messages from the client.
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from.
rcpttos is a list of raw addresses the client wishes to deliver the
message to.
data is a string containing the entire full text of the message,
headers (if supplied) and all. It has been `de-transparencied'
according to RFC 821, Section 4.5.2. In other words, a line
containing a `.' followed by other text has had the leading dot
removed.
kwargs is a dictionary containing additional information. It is
empty if decode_data=True was given as init parameter, otherwise
it will contain the following keys:
'mail_options': list of parameters to the mail command. All
elements are uppercase strings. Example:
['BODY=8BITMIME', 'SMTPUTF8'].
'rcpt_options': same, for the rcpt command.
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format.
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>>> s = NNTP('news')
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>>> print('Group', name, 'has', count, 'articles, range', first, 'to', last)
Group comp.lang.python has 51 articles, range 5770 to 5821
>>> resp, subs = s.xhdr('subject', '{0}-{1}'.format(first, last))
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>>>
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>>>
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NzHEAD {0}ZHEAD)rT r� )r r� r_ r� r r r �head� s z_NNTPBase.headc C s$ |dk rdj |�}nd}| j||�S )a+ Process a BODY command. Argument:
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NzBODY {0}ZBODY)rT r� )r r� r_ r� r r r �body� s z_NNTPBase.bodyc C s$ |dk rdj |�}nd}| j||�S )a5 Process an ARTICLE command. Argument:
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- RFC 2980: Common NNTP Extensions
- RFC 3977: Network News Transfer Protocol (version 2)
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>>> from nntplib import NNTP
>>> s = NNTP('news')
>>> resp, count, first, last, name = s.group('comp.lang.python')
>>> print('Group', name, 'has', count, 'articles, range', first, 'to', last)
Group comp.lang.python has 51 articles, range 5770 to 5821
>>> resp, subs = s.xhdr('subject', '{0}-{1}'.format(first, last))
>>> resp = s.quit()
>>>
Here 'resp' is the server response line.
Error responses are turned into exceptions.
To post an article from a file:
>>> f = open(filename, 'rb') # file containing article, including header
>>> resp = s.post(f)
>>>
For descriptions of all methods, read the comments in the code below.
Note that all arguments and return values representing article numbers
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NzHEAD {0}ZHEAD)rT r� )r r� r_ r� r r r �head� s z_NNTPBase.headc C s$ |dk rdj |�}nd}| j||�S )a+ Process a BODY command. Argument:
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NzBODY {0}ZBODY)rT r� )r r� r_ r� r r r �body� s z_NNTPBase.bodyc C s$ |dk rdj |�}nd}| j||�S )a5 Process an ARTICLE command. Argument:
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z_NNTPBase.xhdrc C s. | j dj||�|�\}}| j� }|t||�fS )aF Process an XOVER command (optional server extension) Arguments:
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if end is None, information up to the newest message will be
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Returns:
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ZOVERZXOVERz {0}-{1}r' Nrw )rc r) �tupler� rT r� r� rG ) r r� r_ r� r� r� r| r r8 r r r �over( s z_NNTPBase.overc C sj t jdtd� tjd�}| jd| |�\}}g }x0|D ](}|j|j� �}|r6|j|j dd�� q6W ||fS )z�Process an XGTITLE command (optional server extension) Arguments:
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import sys
# create a Trace object, telling it what to ignore, and whether to
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trace=0, count=1)
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Authentication) and RFC 2487 (Secure SMTP over TLS).
Notes:
Please remember, when doing ESMTP, that the names of the SMTP service
extensions are NOT the same thing as the option keywords for the RCPT
and MAIL commands!
Example:
>>> import smtplib
>>> s=smtplib.SMTP("localhost")
>>> print(s.help())
This is Sendmail version 8.8.4
Topics:
HELO EHLO MAIL RCPT DATA
RSET NOOP QUIT HELP VRFY
EXPN VERB ETRN DSN
For more info use "HELP <topic>".
To report bugs in the implementation send email to
sendmail-bugs@sendmail.org.
For local information send email to Postmaster at your site.
End of HELP info
>>> s.putcmd("vrfy","someone@here")
>>> s.getreply()
(250, "Somebody OverHere <somebody@here.my.org>")
>>> s.quit()
� N)� body_encode�
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c C s || _ || _||f| _d S )N)� smtp_code�
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SMTP Objects:
SMTP objects have the following attributes:
helo_resp
This is the message given by the server in response to the
most recent HELO command.
ehlo_resp
This is the message given by the server in response to the
most recent EHLO command. This is usually multiline.
does_esmtp
This is a True value _after you do an EHLO command_, if the
server supports ESMTP.
esmtp_features
This is a dictionary, which, if the server supports ESMTP,
will _after you do an EHLO command_, contain the names of the
SMTP service extensions this server supports, and their
parameters (if any).
Note, all extension names are mapped to lower case in the
dictionary.
See each method's docstrings for details. In general, there is a
method of the same name to perform each SMTP command. There is also a
method called 'sendmail' that will do an entire mail transaction.
r N�ehlor c
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r� Y nX d| | _dS )a Initialize a new instance.
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By default, smtplib.SMTP_PORT is used. If a host is specified the
connect method is called, and if it returns anything other than a
success code an SMTPConnectError is raised. If specified,
`local_hostname` is used as the FQDN of the local host in the HELO/EHLO
command. Otherwise, the local hostname is found using
socket.getfqdn(). The `source_address` parameter takes a 2-tuple (host,
port) for the socket to bind to as its source address before
connecting. If the host is '' and port is 0, the OS default behavior
will be used.
�ascii�� N�.z 127.0.0.1z[%s])�_host�timeout�esmtp_features�command_encoding�source_address�connect�closer �local_hostname�socketZgetfqdnZ
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zSMTP._get_socket� localhostc C s� |r
|| _ | r~|jd�|jd�kr~|jd�}|dkr~|d|� ||d d� }}y t|�}W n tk
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� \}}| jdkr�| jdt|�� ||fS )ap Connect to a host on a given port.
If the hostname ends with a colon (`:') followed by a number, and
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Note: This method is automatically invoked by __init__, if a host is
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ValueError�OSError� default_portrE rM rO r6 �sockrH �getreply�repr)r r> r? r9 �ir r r r r r: 5 s(
z SMTP.connectc C s� | j dkr| jdt|�� t| d�rx| jrxt|t�r@|j| j�}y| jj |� W q� t
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rt | j � t d��Y q�X nt d��dS )zSend `s' to the server.r zsend:rX zServer not connectedzplease run connect() firstN)
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isinstance�str�encoder8 ZsendallrV r; r )r �sr r r �sendW s
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rn } z | j� tdt|� ��W Y dd}~X nX |s�| j� td��| j dkr�| j
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d||f � ||fS )a� Get a reply from the server.
Returns a tuple consisting of:
- server response code (e.g. '250', or such, if all goes well)
Note: returns -1 if it can't read response code.
- server response string corresponding to response code (multiline
responses are converted to a single, multiline string).
Raises SMTPServerDisconnected if end-of-file is reached.
N�rbrG z Connection unexpectedly closed: z Connection unexpectedly closedr zreply:i� zLine too long.� s
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z
SMTP.getreplyc C s | j ||� | j� S )z-Send a command, and return its response code.)rc rY )r rb r r r r rB � s z
SMTP.docmdc C s, | j d|p| j� | j� \}}|| _||fS )zwSMTP 'helo' command.
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�helo)rc r< rY � helo_resp)r �namer r r r r rt � s z SMTP.heloc
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|�}|r�|jd �j� }|j|jd �d � j� } |dk�r6| j j|d�d | | j |< q�| | j |< q�W ||fS )zx SMTP 'ehlo' command.
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host.
rG r zServer not connected� zlatin-1�
�authr � z((?P<feature>[A-Za-z0-9][A-Za-z0-9\-]*) ?�featureNri )r7 rc �ehlo_msgr< rY rm r; r � ehlo_resp�
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r Y nX dS )a Internal 'rset' command which ignores any SMTPServerDisconnected error.
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should appear to the application when the *next* command is issued, if
we are doing an internal "safety" reset.
N)r� r )r r r r �_rset� s z
SMTP._rsetc C s
| j d�S )z-SMTP 'noop' command -- doesn't do anything :>�noop)rB )r r r r r� s z SMTP.noopc C sh d}|rH| j rHtdd� |D ��r:| jd�r2d| _ntd��ddj|� }| jdd t|�|f � | j� S )
a8 SMTP 'mail' command -- begins mail xfer session.
This method may raise the following exceptions:
SMTPNotSupportedError The options parameter includes 'SMTPUTF8'
but the SMTPUTF8 extension is not supported by
the server.
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z SMTP.rcptc C s� | j d� | j� \}}| jdkr0| jd||f� |dkrDt||��n|t|t�r\t|�jd�}t |�}|d d� t
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a� SMTP 'DATA' command -- sends message data to server.
Automatically quotes lines beginning with a period per rfc821.
Raises SMTPDataError if there is an unexpected reply to the
DATA command; the return value from this method is the final
response code received when the all data is sent. If msg
is a string, lone '\r' and '\n' characters are converted to
'\r\n' characters. If msg is bytes, it is transmitted as is.
r. r zdata:ib r2 � N� .���) rc rY rE rM r r] r^ r0 r_ r/ �bCRLFra )r r r �repl�qr r r r. ! s"
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If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
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zSMTP.ehlo_or_helo_if_neededT)�initial_response_okc C s� |j � }|r|� nd}|dk rJt|jd�dd�}| jd|d | �\}}n| jd|�\}}|dkr�tj|�}t||�jd�dd�}| j|�\}}|d
kr�||fS t||��dS ) a� Authentication command - requires response processing.
'mechanism' specifies which authentication mechanism is to
be used - the valid values are those listed in the 'auth'
element of 'esmtp_features'.
'authobject' must be a callable object taking a single argument:
data = authobject(challenge)
It will be called to process the server's challenge response; the
challenge argument it is passed will be a bytes. It should return
an ASCII string that will be base64 encoded and sent to the server.
Keyword arguments:
- initial_response_ok: Allow sending the RFC 4954 initial-response
to the AUTH command, if the authentication methods supports it.
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auth_cram_md5� s zSMTP.auth_cram_md5c C s d| j | jf S )ze Authobject to use with PLAIN authentication. Requires self.user and
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auth_plain� s zSMTP.auth_plainc C s |dkr| j S | jS dS )ze Authobject to use with LOGIN authentication. Requires self.user and
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auth_login� s zSMTP.auth_loginc s� | j � | jd�std��| jd j� � dddg}� fdd�|D �}|sPtd��|| | _| _xv|D ]n}d |j� j d
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The arguments are:
- user: The user name to authenticate with.
- password: The password for the authentication.
Keyword arguments:
- initial_response_ok: Allow sending the RFC 4954 initial-response
to the AUTH command, if the authentication methods supports it.
If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first.
This method will return normally if the authentication was successful.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
SMTPAuthenticationError The server didn't accept the username/
password combination.
SMTPNotSupportedError The AUTH command is not supported by the
server.
SMTPException No suitable authentication method was
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the identity of the SMTP server and client can be checked. This,
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mail command.
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msg may be a string containing characters in the ASCII range, or a byte
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If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first. If the server does ESMTP, message size
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one recipient. It returns a dictionary, with one entry for each
recipient that was refused. Each entry contains a tuple of the SMTP
error code and the accompanying error message sent by the server.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
SMTPRecipientsRefused The server rejected ALL recipients
(no mail was sent).
SMTPSenderRefused The server didn't accept the from_addr.
SMTPDataError The server replied with an unexpected
error code (other than a refusal of
a recipient).
SMTPNotSupportedError The mail_options parameter includes 'SMTPUTF8'
but the SMTPUTF8 extension is not supported by
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Note: the connection will be open even after an exception is raised.
Example:
>>> import smtplib
>>> s=smtplib.SMTP("localhost")
>>> tolist=["one@one.org","two@two.org","three@three.org","four@four.org"]
>>> msg = '''\
... From: Me@my.org
... Subject: testin'...
...
... This is a test '''
>>> s.sendmail("me@my.org",tolist,msg)
{ "three@three.org" : ( 550 ,"User unknown" ) }
>>> s.quit()
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550. If all addresses are accepted, then the method will return an
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when the frame was captured.
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c c s& x | dk r | j | jfV | j} qW dS )z�Walk a traceback yielding the frame and line number for each frame.
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objects, or the constructor to create TracebackException instances from
individual components.
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- :attr:`__context__` A TracebackException of the original *__context__*.
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occurred.
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occurred.
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\�< � # @ s� d Z ddlZddlZddlZddlZy ddlZW n ek
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This module provides regular expression matching operations similar to
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characters outside the US ASCII range.
Regular expressions can contain both special and ordinary characters.
Most ordinary characters, like "A", "a", or "0", are the simplest
regular expressions; they simply match themselves. You can
concatenate ordinary characters, so last matches the string 'last'.
The special characters are:
"." Matches any character except a newline.
"^" Matches the start of the string.
"$" Matches the end of the string or just before the newline at
the end of the string.
"*" Matches 0 or more (greedy) repetitions of the preceding RE.
Greedy means that it will match as many repetitions as possible.
"+" Matches 1 or more (greedy) repetitions of the preceding RE.
"?" Matches 0 or 1 (greedy) of the preceding RE.
*?,+?,?? Non-greedy versions of the previous three special characters.
{m,n} Matches from m to n repetitions of the preceding RE.
{m,n}? Non-greedy version of the above.
"\\" Either escapes special characters or signals a special sequence.
[] Indicates a set of characters.
A "^" as the first character indicates a complementing set.
"|" A|B, creates an RE that will match either A or B.
(...) Matches the RE inside the parentheses.
The contents can be retrieved or matched later in the string.
(?aiLmsux) Set the A, I, L, M, S, U, or X flag for the RE (see below).
(?:...) Non-grouping version of regular parentheses.
(?P<name>...) The substring matched by the group is accessible by name.
(?P=name) Matches the text matched earlier by the group named name.
(?#...) A comment; ignored.
(?=...) Matches if ... matches next, but doesn't consume the string.
(?!...) Matches if ... doesn't match next.
(?<=...) Matches if preceded by ... (must be fixed length).
(?<!...) Matches if not preceded by ... (must be fixed length).
(?(id/name)yes|no) Matches yes pattern if the group with id/name matched,
the (optional) no pattern otherwise.
The special sequences consist of "\\" and a character from the list
below. If the ordinary character is not on the list, then the
resulting RE will match the second character.
\number Matches the contents of the group of the same number.
\A Matches only at the start of the string.
\Z Matches only at the end of the string.
\b Matches the empty string, but only at the start or end of a word.
\B Matches the empty string, but not at the start or end of a word.
\d Matches any decimal digit; equivalent to the set [0-9] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode digits.
\D Matches any non-digit character; equivalent to [^\d].
\s Matches any whitespace character; equivalent to [ \t\n\r\f\v] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode whitespace characters.
\S Matches any non-whitespace character; equivalent to [^\s].
\w Matches any alphanumeric character; equivalent to [a-zA-Z0-9_]
in bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the
range of Unicode alphanumeric characters (letters plus digits
plus underscore).
With LOCALE, it will match the set [0-9_] plus characters defined
as letters for the current locale.
\W Matches the complement of \w.
\\ Matches a literal backslash.
This module exports the following functions:
match Match a regular expression pattern to the beginning of a string.
fullmatch Match a regular expression pattern to all of a string.
search Search a string for the presence of a pattern.
sub Substitute occurrences of a pattern found in a string.
subn Same as sub, but also return the number of substitutions made.
split Split a string by the occurrences of a pattern.
findall Find all occurrences of a pattern in a string.
finditer Return an iterator yielding a match object for each match.
compile Compile a pattern into a RegexObject.
purge Clear the regular expression cache.
escape Backslash all non-alphanumerics in a string.
Some of the functions in this module takes flags as optional parameters:
A ASCII For string patterns, make \w, \W, \b, \B, \d, \D
match the corresponding ASCII character categories
(rather than the whole Unicode categories, which is the
default).
For bytes patterns, this flag is the only available
behaviour and needn't be specified.
I IGNORECASE Perform case-insensitive matching.
L LOCALE Make \w, \W, \b, \B, dependent on the current locale.
M MULTILINE "^" matches the beginning of lines (after a newline)
as well as the string.
"$" matches the end of lines (before a newline) as well
as the end of the string.
S DOTALL "." matches any character at all, including the newline.
X VERBOSE Ignore whitespace and comments for nicer looking RE's.
U UNICODE For compatibility only. Ignored for string patterns (it
is the default), and forbidden for bytes patterns.
This module also defines an exception 'error'.
� N�match� fullmatch�search�sub�subn�split�findall�finditer�compile�purge�template�escape�error�A�I�L�M�S�X�U�ASCII�
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callable; if a string, backslash escapes in it are processed.
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return a replacement string to be used.)r0 r )r1 r4 r2 r5 r3 r. r. r/ r � s c C s t | |�j||�S )a� Split the source string by the occurrences of the pattern,
returning a list containing the resulting substrings. If
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list. If maxsplit is nonzero, at most maxsplit splits occur,
and the remainder of the string is returned as the final element
of the list.)r0 r )r1 r2 �maxsplitr3 r. r. r/ r � s c C s t | |�j|�S )a Return a list of all non-overlapping matches in the string.
If one or more capturing groups are present in the pattern, return
a list of groups; this will be a list of tuples if the pattern
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dd� Zdd� Zdd � Zeeej�\ZZd d � Zeeej�\ZZd d � Zeeej�\ZZ d!d"� Z ee ej �\Z Z d#d$� Z!d%d&� Z"d'd(� Z#d)d*� Z$d+d,� Z%d-d.� Z&d/d0� Z'd1d2� Z(d3d4� Z)d5d6� Z*d7d8� Z+d9d:� Z,dVd;d<�Z-d=d>� Z.d?d@� Z/dAdB� Z0dCdD� Z1dEdF� Z2dGdH� Z3dIdJ� Z4dKdL� Z5dMdN� Z6dOdP� Z7dQdR� Z8� Z9S )Wr a] This class implements rational numbers.
In the two-argument form of the constructor, Fraction(8, 6) will
produce a rational number equivalent to 4/3. Both arguments must
be Rational. The numerator defaults to 0 and the denominator
defaults to 1 so that Fraction(3) == 3 and Fraction() == 0.
Fractions can also be constructed from:
- numeric strings similar to those accepted by the
float constructor (for example, '-2.3' or '1e10')
- strings of the form '123/456'
- float and Decimal instances
- other Rational instances (including integers)
�
_numerator� _denominatorr NT)�
_normalizec sR t t| �j| �}|dk�rdt|�tkr6||_d|_|S t|tj �rV|j
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}||_||_|S )a� Constructs a Rational.
Takes a string like '3/2' or '1.5', another Rational instance, a
numerator/denominator pair, or a float.
Examples
--------
>>> Fraction(10, -8)
Fraction(-5, 4)
>>> Fraction(Fraction(1, 7), 5)
Fraction(1, 35)
>>> Fraction(Fraction(1, 7), Fraction(2, 3))
Fraction(3, 14)
>>> Fraction('314')
Fraction(314, 1)
>>> Fraction('-35/4')
Fraction(-35, 4)
>>> Fraction('3.1415') # conversion from numeric string
Fraction(6283, 2000)
>>> Fraction('-47e-2') # string may include a decimal exponent
Fraction(-47, 100)
>>> Fraction(1.47) # direct construction from float (exact conversion)
Fraction(6620291452234629, 4503599627370496)
>>> Fraction(2.25)
Fraction(9, 4)
>>> Fraction(Decimal('1.47'))
Fraction(147, 100)
N� z Invalid literal for Fraction: %rZnum�0�denom�decimal�
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zFraction.__new__c C sD t |tj�r| |�S t |t�s8td| j|t|�jf ��| |j� � S )z�Converts a finite float to a rational number, exactly.
Beware that Fraction.from_float(0.3) != Fraction(3, 10).
z.%s.from_float() only takes floats, not %r (%s))r r �Integralr" r* �__name__r r# )r, �fr r r �
from_float� s
zFraction.from_floatc C sV ddl m} t|tj�r&|t|��}n$t||�sJtd| j|t|�jf ��| |j � � S )zAConverts a finite Decimal instance to a rational number, exactly.r )r z2%s.from_decimal() only takes Decimals, not %r (%s))
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| �} t||�} t| | �t| | �kr�| S | S dS )aW Closest Fraction to self with denominator at most max_denominator.
>>> Fraction('3.141592653589793').limit_denominator(10)
Fraction(22, 7)
>>> Fraction('3.141592653589793').limit_denominator(100)
Fraction(311, 99)
>>> Fraction(4321, 8765).limit_denominator(10000)
Fraction(4321, 8765)
r z$max_denominator should be at least 1r N)r r r r )r' r r r �abs)
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%s(%s, %s))r0 r2 r r )r- r r r �__repr__ s zFraction.__repr__c C s( | j dkrt| j�S d| j| j f S dS )z str(self)r z%s/%sN)r r$ r )r- r r r �__str__ s
zFraction.__str__c sT � �fdd�}d� j d |_ �j|_� �fdd�}d� j d |_ �j|_||fS )a� Generates forward and reverse operators given a purely-rational
operator and a function from the operator module.
Use this like:
__op__, __rop__ = _operator_fallbacks(just_rational_op, operator.op)
In general, we want to implement the arithmetic operations so
that mixed-mode operations either call an implementation whose
author knew about the types of both arguments, or convert both
to the nearest built in type and do the operation there. In
Fraction, that means that we define __add__ and __radd__ as:
def __add__(self, other):
# Both types have numerators/denominator attributes,
# so do the operation directly
if isinstance(other, (int, Fraction)):
return Fraction(self.numerator * other.denominator +
other.numerator * self.denominator,
self.denominator * other.denominator)
# float and complex don't have those operations, but we
# know about those types, so special case them.
elif isinstance(other, float):
return float(self) + other
elif isinstance(other, complex):
return complex(self) + other
# Let the other type take over.
return NotImplemented
def __radd__(self, other):
# radd handles more types than add because there's
# nothing left to fall back to.
if isinstance(other, numbers.Rational):
return Fraction(self.numerator * other.denominator +
other.numerator * self.denominator,
self.denominator * other.denominator)
elif isinstance(other, Real):
return float(other) + float(self)
elif isinstance(other, Complex):
return complex(other) + complex(self)
return NotImplemented
There are 5 different cases for a mixed-type addition on
Fraction. I'll refer to all of the above code that doesn't
refer to Fraction, float, or complex as "boilerplate". 'r'
will be an instance of Fraction, which is a subtype of
Rational (r : Fraction <: Rational), and b : B <:
Complex. The first three involve 'r + b':
1. If B <: Fraction, int, float, or complex, we handle
that specially, and all is well.
2. If Fraction falls back to the boilerplate code, and it
were to return a value from __add__, we'd miss the
possibility that B defines a more intelligent __radd__,
so the boilerplate should return NotImplemented from
__add__. In particular, we don't handle Rational
here, even though we could get an exact answer, in case
the other type wants to do something special.
3. If B <: Fraction, Python tries B.__radd__ before
Fraction.__add__. This is ok, because it was
implemented with knowledge of Fraction, so it can
handle those instances before delegating to Real or
Complex.
The next two situations describe 'b + r'. We assume that b
didn't know about Fraction in its implementation, and that it
uses similar boilerplate code:
4. If B <: Rational, then __radd_ converts both to the
builtin rational type (hey look, that's us) and
proceeds.
5. Otherwise, __radd__ tries to find the nearest common
base ABC, and fall back to its builtin type. Since this
class doesn't subclass a concrete type, there's no
implementation to fall back to, so we need to try as
hard as possible to return an actual value, or the user
will get a TypeError.
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r r r �
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r �divr r r �__mod__� s zFraction.__mod__c C s || }|| | S )za % br )r r
rQ r r r �__rmod__� s zFraction.__rmod__c C s� t |tj�r�|jdkr�|j}|dkr>t| j| | j| dd�S | jdkrft| j| | j| dd�S t| j | | j | dd�S q�t| �t|� S n t| �| S dS )z�a ** b
If b is not an integer, the result will be a float or complex
since roots are generally irrational. If b is an integer, the
result will be rational.
r r F)r N) r r r r! r r r r r" )r
r Zpowerr r r �__pow__� s
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r r r �__rpow__� s
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r r r �__neg__� s zFraction.__neg__c C s t t| j�| jdd�S )zabs(a)F)r )r r7 r r )r
r r r �__abs__� s zFraction.__abs__c C s* | j dk r| j | j S | j | j S dS )ztrunc(a)r N)r r )r
r r r � __trunc__� s
zFraction.__trunc__c C s | j | j S )z Will be math.floor(a) in 3.0.)r r! )r
r r r � __floor__� s zFraction.__floor__c C s | j | j S )z Will be math.ceil(a) in 3.0.)r r! )r
r r r �__ceil__ s zFraction.__ceil__c C s� |dkrZt | j| j�\}}|d | jk r,|S |d | jkrB|d S |d dkrR|S |d S dt|� }|dkr�tt| | �|�S tt| | �| �S dS )zOWill be round(self, ndigits) in 3.0.
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|�rN|d|�S || | j |��S nt S dS )ac Helper for comparison operators, for internal use only.
Implement comparison between a Rational instance `self`, and
either another Rational instance or a float `other`. If
`other` is not a Rational instance or a float, return
NotImplemented. `op` should be one of the six standard
comparison operators.
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When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for linear samples)
getcompname() -- returns human-readable version of
compression type ('not compressed' linear samples)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
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Writing WAVE files:
f = wave.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without pathing up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
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but when it is set to the correct value, the header does not have to
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_nframes -- the number of audio frames
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_sampwidth -- the number of bytes per audio sample
available through the getsampwidth() method
_framerate -- the sampling frequency
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_comptype -- the AIFF-C compression type ('NONE' if AIFF)
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_compname -- the human-readable AIFF-C compression type
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_soundpos -- the position in the audio stream
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_data_seek_needed -- 1 iff positioned correctly in audio
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set through the setcomptype() or setparams() method
_compname -- the human-readable AIFF-C compression type
set through the setcomptype() or setparams() method
_nchannels -- the number of audio channels
set through the setnchannels() or setparams() method
_sampwidth -- the number of bytes per audio sample
set through the setsampwidth() or setparams() method
_framerate -- the sampling frequency
set through the setframerate() or setparams() method
_nframes -- the number of audio frames written to the header
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The property list (.plist) file format is a simple XML pickle supporting
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To write out a plist file, use the dump(value, file)
function. 'value' is the top level object, 'file' is
a (writable) file object.
To parse a plist from a file, use the load(file) function,
with a (readable) file object as the only argument. It
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To work with plist data in bytes objects, you can use loads()
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Values can be strings, integers, floats, booleans, tuples, lists,
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Generate Plist example:
pl = dict(
aString = "Doodah",
aList = ["A", "B", 12, 32.1, [1, 2, 3]],
aFloat = 0.1,
anInt = 728,
aDict = dict(
anotherString = "<hello & hi there!>",
aUnicodeValue = "M\xe4ssig, Ma\xdf",
aTrueValue = True,
aFalseValue = False,
),
someData = b"<binary gunk>",
someMoreData = b"<lots of binary gunk>" * 10,
aDate = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())),
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with open(fileName, 'wb') as fp:
dump(pl, fp)
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with open(fileName, 'rb') as fp:
pl = load(fp)
print(pl["aKey"])
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Read a plist data from a bytes object. Return the root object.
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Return 'value' as a plist-formatted bytes object.
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stripped_partr r r r* � s
z_PosixFlavour.splitrootc C s |S )Nr )r# rZ r r r r8 s z_PosixFlavour.casefoldc C s |S )Nr )r# r0 r r r r] s z _PosixFlavour.casefold_partsc C s dS )NFr )r# r0 r r r rc s z_PosixFlavour.is_reservedc C s t |�}dt|� S )Nzfile://)�bytesrf )r# rh Zbpathr r r rj s z_PosixFlavour.make_uric C st |s:y
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rn td| ��Y nX d S )Nrk r z%Can't determine home directory for %r) rl rm rn �pwd�getpwuid�getuid�pw_dir�getpwnamro )r# rp r} r r r rr s
z_PosixFlavour.gethomedirN)r: r; r< r! r' rs � posixpathru rl rv rw r* r8 r] rc rj rr r r r r r{ � s
r{ c @ s e Zd ZdZdS )� _AccessorzjAn accessor implements a particular (system-specific or not) way of
accessing paths on the filesystem.N)r: r; r< r= r r r r r� , s r� c @ s� e Zd Zdd� Zdd� Zeej�Zeej�Zeej�Zeej �Z eej
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� ZejZeejj�Zeejj�ZdS )�_NormalAccessorc s t j� �� fdd��}t|�S )Nc s � t | �f|�� S )N)�str)�pathobj�args)�strfuncr r �wrapped4 s z._NormalAccessor._wrap_strfunc.<locals>.wrapped)� functools�wraps� staticmethod)r� r� r )r� r �
_wrap_strfunc3 s z _NormalAccessor._wrap_strfuncc s t j� �� fdd��}t|�S )Nc s � t | �t |�f|�� S )N)r� )ZpathobjAZpathobjBr� )r� r r r� : s z5_NormalAccessor._wrap_binary_strfunc.<locals>.wrapped)r� r� r� )r� r� r )r� r �_wrap_binary_strfunc9 s z$_NormalAccessor._wrap_binary_strfunc�lchmodc C s t d��d S )Nz%lchmod() not available on this system)�NotImplementedError)r# r� �moder r r r� N s z_NormalAccessor.lchmod�symlinkFc C s t d��d S )Nz)os.symlink() not available on this system)r� )r# �src�dst�target_is_directoryr r r r� ^ s z_NormalAccessor.symlinkc C s
t j|�S )N)rl �readlink)r# rh r r r r� e s z_NormalAccessor.readlinkN)F)r: r; r< r� r� rl �stat�lstat�open�listdir�scandir�chmod�hasattrr� �mkdir�unlink�rmdir�renamer) r� �utimer� �getcwdr� rh �
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r� c C sP | d }| dd � }|dkr"t }n$d|kr4td��nt|�rBt}nt}|||�S )Nr r7 z**z:Invalid pattern: '**' can only be an entire path component)�_RecursiveWildcardSelector�
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r� � lru_cachec @ s e Zd ZdZdd� Zdd� ZdS )� _SelectorzYA selector matches a specific glob pattern part against the children
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z_Selector.__init__c C s< t |�}|j}|j}|jj}||�s,tg �S | j||||�S )zuIterate over all child paths of `parent_path` matched by this
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|V d S )Nr )r# r� r� r� r� r r r r� � s z!_TerminatingSelector._select_fromN)r: r; r< r� r r r r r� � s r� c @ s e Zd Zdd� Zdd� ZdS )r� c C s || _ tj| |� d S )N)rv r� r$ )r# rv r� r r r r$ � s z_PreciseSelector.__init__c c s^ yD|j | j�}| jr|n||�rBx | jj||||�D ]
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rX d S X d S )N)�_make_child_relpathrv r� r� r� �PermissionError)r# r� r� r� r� rh r[ r r r r� � s z _PreciseSelector._select_fromN)r: r; r< r$ r� r r r r r� � s r� c @ s e Zd Zdd� Zdd� ZdS )r� c C s" t jtj|��| _tj| |� d S )N)�re�compile�fnmatch� translater r� r$ )r# r r� r r r r$ � s z_WildcardSelector.__init__c c s� y||j j}t||��}xb|D ]Z}| j s0|j� r |j}||�} | jj| �r |j|�}
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z/_RecursiveWildcardSelector._iterate_directoriesc c s� yjt � }zT| jj}xF| j|||�D ]4}x.|||||�D ] }||kr6|V |j|� q6W q"W W d |j� X W n tk
r~ d S X d S )N)rx r� r� r� �add�clearr� ) r# r� r� r� r� ZyieldedZsuccessor_selectZstarting_pointr[ r r r r� � s z'_RecursiveWildcardSelector._select_fromN)r: r; r< r$ r� r� r r r r r� � s r� c @ s4 e Zd ZdZdZdd� Zdd � Zd
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� ZdS )� _PathParentszvThis object provides sequence-like access to the logical ancestors
of a path. Don't try to construct it yourself.�_pathcls�_drv�_root�_partsc C s& t |�| _|j| _|j| _|j| _d S )N)r� r� r� r� r� )r# rh r r r r$ � s
z_PathParents.__init__c C s( | j s | jrt| j�d S t| j�S d S )Nr7 )r� r� rR r� )r# r r r �__len__� s z_PathParents.__len__c C s@ |dk s|t | �kr t|��| jj| j| j| jd | d � �S )Nr r7 )rR �
IndexErrorr� �_from_parsed_partsr� r� r� )r# �idxr r r � __getitem__ s z_PathParents.__getitem__c C s dj | jj�S )Nz <{}.parents>)�formatr� r: )r# r r r �__repr__
s z_PathParents.__repr__N)r� r� r� r� ) r: r; r< r= � __slots__r$ r� r� r� r r r r r� � s r� c @ s� e Zd ZdZdZZd d
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d� �Zed[dd��Z ed\dd��Z
edd� �Z dd� Z dd� Z
dd� Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� Zed&d'� �Zd(d)� Zd*d+� Zd,d-� Zd.d/� Zd0d1� Zd2d3� Zee d�d4d5�Z ee d�d6d5�Z ed7d8� �Z ed9d:� �Z ed;d<� �Z!ed=d>� �Z"ed?d@� �Z#dAdB� Z$dCdD� Z%dEdF� Z&edGdH� �Z'dIdJ� Z(dKdL� Z)dMdN� Z*edOdP� �Z+edQdR� �Z,dSdT� Z-dUdV� Z.dWdX� Z/dYS )]r a| Base class for manipulating paths without I/O.
PurePath represents a filesystem path and offers operations which
don't imply any actual filesystem I/O. Depending on your system,
instantiating a PurePath will return either a PurePosixPath or a
PureWindowsPath object. You can also instantiate either of these classes
directly, regardless of your system.
r� r� r� �_str�_hash�_pparts�_cached_cpartsc G s$ | t krtjdkrtnt} | j|�S )z�Construct a PurePath from one or several strings and or existing
PurePath objects. The strings and path objects are combined so as
to yield a canonicalized path, which is incorporated into the
new PurePath object.
rA )r rl rv r r � _from_parts)r� r� r r r �__new__ s zPurePath.__new__c C s | j t| j�fS )N)� __class__�tupler� )r# r r r �
__reduce__& s zPurePath.__reduce__c C sh g }xV|D ]N}t |t�r$||j7 }q
tj|�}t |t�rH|jt|�� q
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|�S )NzNargument should be a str object or an os.PathLike object returning str, not %r) �
isinstancer r� rl �fspathr� r, � TypeErrorr� r� r6 )r� r� r0 rE r r r � _parse_args+ s
zPurePath._parse_argsTc C s< t j| �}|j|�\}}}||_||_||_|r8|j� |S )N)�objectr� r� r� r� r� �_init)r� r� �initr# r1 r2 r0 r r r r� ? s
zPurePath._from_partsc C s, t j| �}||_||_||_|r(|j� |S )N)r� r� r� r� r� r� )r� r1 r2 r0 r� r# r r r r� L s
zPurePath._from_parsed_partsc C s4 |s|r$|| | j j|dd � � S | j j|�S d S )Nr7 )r� r" )r� r1 r2 r0 r r r �_format_parsed_partsV s z PurePath._format_parsed_partsc C s d S )Nr )r# r r r r� ] s zPurePath._initc C s@ | j |�\}}}| jj| j| j| j|||�\}}}| j|||�S )N)r� r� r9 r� r� r� r� )r# r� r1 r2 r0 r r r � _make_childa s zPurePath._make_childc C s< y| j S tk
r6 | j| j| j| j�p,d| _ | j S X dS )z[Return the string representation of the path, suitable for
passing to system calls.r& N)r� �AttributeErrorr� r� r� r� )r# r r r �__str__g s zPurePath.__str__c C s t | �S )N)r� )r# r r r �
__fspath__q s zPurePath.__fspath__c C s | j }t| �j|jd�S )zNReturn the string representation of the path with forward (/)
slashes.r@ )r� r� r) r! )r# �fr r r re t s zPurePath.as_posixc C s t jt| ��S )zaReturn the bytes representation of the path. This is only
recommended to use under Unix.)rl �fsencoder� )r# r r r � __bytes__z s zPurePath.__bytes__c C s dj | jj| j� �S )Nz{}({!r}))r� r� r: re )r# r r r r� s zPurePath.__repr__c C s | j � std��| jj| �S )z Return the path as a 'file' URI.z.relative path can't be expressed as a file URI)� is_absoluter� r� rj )r# r r r �as_uri� s zPurePath.as_uric C s2 y| j S tk
r, | jj| j�| _ | j S X d S )N)r� r� r� r] r� )r# r r r �_cparts� s
zPurePath._cpartsc C s& t |t�stS | j|jko$| j|jkS )N)r� r �NotImplementedr� r� )r# �otherr r r �__eq__� s
zPurePath.__eq__c C s2 y| j S tk
r, tt| j��| _ | j S X d S )N)r� r� �hashr� r� )r# r r r �__hash__� s
zPurePath.__hash__c C s( t |t� s| j|jk r tS | j|jk S )N)r� r r� r� r� )r# r� r r r �__lt__� s zPurePath.__lt__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__le__� s zPurePath.__le__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__gt__� s zPurePath.__gt__c C s( t |t� s| j|jk r tS | j|jkS )N)r� r r� r� r� )r# r� r r r �__ge__� s zPurePath.__ge__z.The drive prefix (letter or UNC path), if any.)�docz The root of the path, if any.c C s | j | j }|S )z/The concatenation of the drive and root, or ''.)r� r� )r# �anchorr r r r� � s zPurePath.anchorc C s. | j }t|�| js| jr dndkr&dS |d S )z!The final path component, if any.r7 r r% rO )r� rR r� r� )r# r0 r r r rv � s z
PurePath.namec C sD | j }|jd�}d| k o*t|�d k n r<||d� S dS dS )z*The final component's last suffix, if any.r& r r7 Nr% )rv �rfindrR )r# rv rI r r r �suffix� s
zPurePath.suffixc C s: | j }|jd�rg S |jd�}dd� |jd�dd� D �S )z1A list of the final component's suffixes, if any.r& c S s g | ] }d | �qS )r& r )rC r� r r r r\ � s z%PurePath.suffixes.<locals>.<listcomp>r7 N)rv �endswithrT r+ )r# rv r r r �suffixes� s
zPurePath.suffixesc C sD | j }|jd�}d| k o*t|�d k n r<|d|� S |S dS )z0The final path component, minus its last suffix.r& r r7 N)rv r� rR )r# rv rI r r r �stem� s
z
PurePath.stemc C s� | j std| f ��| jj|f�\}}}| sZ|d | jj| jjgksZ|sZ|sZt|�dkrftd| ��| j| j| j | j
dd� |g �S )z-Return a new path with the file name changed.z%r has an empty namer7 zInvalid name %rNrO rO ) rv r� r� r6 r! r' rR r� r� r� r� )r# rv r1 r2 r0 r r r � with_name� s zPurePath.with_namec C s� | j }|j|ks |jr,|j|kr,td| ��|r<|jd� sD|dkrPtd| ��| j}|shtd| f ��| j}|s||| }n|dt|� � | }| j| j | j
| j dd� |g �S )z�Return a new path with the file suffix changed. If the path
has no suffix, add given suffix. If the given suffix is an empty
string, remove the suffix from the path.
zInvalid suffix %rr& z%r has an empty nameNr7 rO ) r� r! r' r� r_ rv r� rR r� r� r� r� )r# r� r� rv Z
old_suffixr r r � with_suffix� s
zPurePath.with_suffixc
G s� |s t d��| j}| j}| j}|r8||g|dd� }n|}| j|�\}}}|rf||g|dd� } n|} t| �}
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d� �S )z�Return the relative path to another path identified by the passed
arguments. If the operation is not possible (because this is not
a subpath of the other path), raise ValueError.
zneed at least one argumentr7 Nr z {!r} does not start with {!r}r% )
r� r� r� r� r� rR r� r] r� r� r� r� r� )
r# r� r0 r1 r2 Z abs_partsZto_drvZto_rootZto_partsZ to_abs_parts�nr� Z formattedr r r � relative_to s( (zPurePath.relative_toc C s. y| j S tk
r( t| j�| _ | j S X dS )zZAn object providing sequence-like access to the
components in the filesystem path.N)r� r� r� r� )r# r r r r0 " s
zPurePath.partsc G s
| j |�S )z�Combine this path with one or several arguments, and return a
new path representing either a subpath (if all arguments are relative
paths) or a totally different path (if one of the arguments is
anchored).
)r� )r# r� r r r �joinpath. s zPurePath.joinpathc C s | j |f�S )N)r� )r# �keyr r r � __truediv__6 s zPurePath.__truediv__c C s | j |g| j �S )N)r� r� )r# r r r r � __rtruediv__9 s zPurePath.__rtruediv__c C s@ | j }| j}| j}t|�dkr*|s&|r*| S | j|||dd� �S )z The logical parent of the path.r7 NrO )r� r� r� rR r� )r# r1 r2 r0 r r r �parent< s zPurePath.parentc C s t | �S )z*A sequence of this path's logical parents.)r� )r# r r r �parentsF s zPurePath.parentsc C s | j s
dS | jj p t| j�S )zSTrue if the path is absolute (has both a root and, if applicable,
a drive).F)r� r� rs �boolr� )r# r r r r� K s zPurePath.is_absolutec C s | j j| j�S )zaReturn True if the path contains one of the special names reserved
by the system, if any.)r� rc r� )r# r r r rc R s zPurePath.is_reservedc C s� | j j}||�}| j j|f�\}}}|s0td��|rF||| j�krFdS |r\||| j�kr\dS | j}|sj|r�t|�t|�kr~dS |dd� }nt|�t|�kr�dS x.tt |�t |��D ]\}}t
j ||�s�dS q�W dS )zE
Return True if this path matches the given pattern.
z
empty patternFr7 NT) r� r8 r6 r� r� r� r� rR �zipr( r� Z fnmatchcase) r# Z path_patternr� r1 r2 Z pat_partsr0 r4 r r r r r� W s( zPurePath.matchN)r� r� r� r� r� r� r� )T)T)0r: r; r< r= r� r� r� � classmethodr� r� r� r� r� r� r� r� re r� r� r� �propertyr� r� r� r� r� r� r� r rd r2 r� rv r� r r r r r r0 r r r
r r r� rc r� r r r r r s^
c @ s e Zd ZdZeZf ZdS )r z�PurePath subclass for non-Windows systems.
On a POSIX system, instantiating a PurePath should return this object.
However, you can also instantiate it directly on any system.
N)r: r; r< r= �_posix_flavourr� r� r r r r r u s c @ s e Zd ZdZeZf ZdS )r z�PurePath subclass for Windows systems.
On a Windows system, instantiating a PurePath should return this object.
However, you can also instantiate it directly on any system.
N)r: r; r< r= �_windows_flavourr� r� r r r r r s c @ s� e Zd ZdZdaZdd� Zdbdd�Zd d
� Zd d � Zd
d� Z dd� Z
dcdd�Z dddd�Z e
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dd� �Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zded&d'�Zd(d)� Zd*d+� Zd,d-� Zdgd0d1�Zd2d3� Zdhd4d5�Zd6d7� Z did8d9�Z djd;d<�Z dkd=d>�Z d?d@� Z dAdB� Z!dCdD� Z"dEdF� Z#dGdH� Z$dIdJ� Z%dKdL� Z&dldMdN�Z'dOdP� Z(dQdR� Z)dSdT� Z*dUdV� Z+dWdX� Z,dYdZ� Z-d[d\� Z.d]d^� Z/d_d`� Z0dS )mr a� PurePath subclass that can make system calls.
Path represents a filesystem path but unlike PurePath, also offers
methods to do system calls on path objects. Depending on your system,
instantiating a Path will return either a PosixPath or a WindowsPath
object. You can also instantiate a PosixPath or WindowsPath directly,
but cannot instantiate a WindowsPath on a POSIX system or vice versa.
r� �_closedc O sL | t krtjdkrtnt} | j|dd�}|jjs@td| j f ��|j
� |S )NrA F)r� z$cannot instantiate %r on your system) r rl rv r r r� r� rw r� r: r� )r� r� �kwargsr# r r r r� � s z Path.__new__Nc C s" d| _ |d k r|j| _nt| _d S )NF)r r� �_normal_accessor)r# �templater r r r� � s
z
Path._initc C s | j |g }| j| j| j|�S )N)r� r� r� r� )r# r4 r0 r r r r� � s zPath._make_child_relpathc C s | j r| j� | S )N)r �
_raise_closed)r# r r r � __enter__� s zPath.__enter__c C s
d| _ d S )NT)r )r# �t�v�tbr r r �__exit__� s z
Path.__exit__c C s t d��d S )Nz I/O operation on closed path)r� )r# r r r r � s zPath._raise_closed� c C s | j j| ||�S )N)r� r� )r# rv �flagsr� r r r �_opener� s z Path._opener� c C s | j r| j� | jj| ||�S )zm
Open the file pointed by this path and return a file descriptor,
as os.open() does.
)r r r� r� )r# r r� r r r � _raw_open� s zPath._raw_openc C s | t j� �S )zjReturn a new path pointing to the current working directory
(as returned by os.getcwd()).
)rl r� )r� r r r �cwd� s zPath.cwdc C s | | � j jd��S )zrReturn a new path pointing to the user's home directory (as
returned by os.path.expanduser('~')).
N)r� rr )r� r r r �home� s z Path.homec C sB | j � }y |j � }W n tk
r2 tj |�}Y nX tjj||�S )zoReturn whether other_path is the same or not as this file
(as returned by os.path.samefile()).
)r� r� rl rh �samestat)r# Z
other_path�stZother_str r r �samefile� s z
Path.samefilec c sL | j r| j� x8| jj| �D ](}|dkr*q | j|�V | j r | j� q W dS )zyIterate over the files in this directory. Does not yield any
result for the special paths '.' and '..'.
r& �..N> r& r' )r r r� r� r� )r# rv r r r �iterdir� s z Path.iterdirc c sl |st dj|���| jj|�}| jj|f�\}}}|s:|rBtd��tt|��}x|j| �D ]
}|V qZW dS )z�Iterate over this subtree and yield all existing files (of any
kind, including directories) matching the given pattern.
zUnacceptable pattern: {!r}z%Non-relative patterns are unsupportedN) r� r� r� r8 r6 r� r� r� r� )r# �patternr1 r2 r� �selectorr[ r r r �glob� s z Path.globc c s^ | j j|�}| j j|f�\}}}|s(|r0td��tdt|� �}x|j| �D ]
}|V qLW dS )z�Recursively yield all existing files (of any kind, including
directories) matching the given pattern, anywhere in this subtree.
z%Non-relative patterns are unsupported�**N)r, )r� r8 r6 r� r� r� r� )r# r) r1 r2 r� r* r[ r r r �rglob s z
Path.rglobc C sD | j r| j� | j� r| S | jtj� g| j dd�}|j| d� |S )a Return an absolute version of this path. This function works
even if the path doesn't point to anything.
No normalization is done, i.e. all '.' and '..' will be kept along.
Use resolve() to get the canonical path to a file.
F)r� )r )r r r� r� rl r� r� r� )r# �objr r r �absolute s z
Path.absoluteFc C s� | j r| j� dd� }y| jj| |d�}W n, tk
rV } z||� � W Y dd}~X nX | j|f�}|s�y |j� W n* tk
r� } z||� W Y dd}~X nX |S )z�
Make the path absolute, resolving all symlinks on the way and also
normalizing it (for example turning slashes into backslashes under
Windows).
c S s0 t | dd�}| jtks |tkr,td| j ��d S )N�winerrorr zSymlink loop from %r)�getattr�errnor � _WINERROR_CANT_RESOLVE_FILENAMEro �filename)�er0 r r r � check_eloop* s z!Path.resolve.<locals>.check_eloop)�strictN)r r r� r� �OSErrorr� r� )r# r7 r6 rZ r5 r[ r r r �resolve! s z Path.resolvec C s | j j| �S )zh
Return the result of the stat() system call on this path, like
os.stat() does.
)r� r� )r# r r r r� ? s z Path.statc C s ddl }|j| j� j�jS )z:
Return the login name of the file owner.
r N)r} r~ r� �st_uidZpw_name)r# r} r r r �ownerF s z
Path.ownerc C s ddl }|j| j� j�jS )z8
Return the group name of the file gid.
r N)�grpZgetgrgidr� �st_gidZgr_name)r# r< r r r �groupM s z
Path.group�rr7 c C s, | j r| j� tjt| �|||||| jd�S )z|
Open the file pointed by this path and return a file object, as
the built-in open() function does.
)�opener)r r �ior� r� r )r# r� � buffering�encoding�errors�newliner r r r� T s z Path.openc C s | j dd��
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Open the file in bytes mode, read it, and close the file.
�rb)r� N)r� �read)r# r� r r r �
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Open the file in text mode, read it, and close the file.
r? )r� rC rD N)r� rG )r# rC rD r� r r r � read_textf s zPath.read_textc C s* t |�}| jdd�� }|j|�S Q R X dS )zO
Open the file in bytes mode, write to it, and close the file.
�wb)r� N)�
memoryviewr� �write)r# �dataZviewr� r r r � write_bytesm s zPath.write_bytesc C s@ t |t�std|jj ��| jd||d�� }|j|�S Q R X dS )zN
Open the file in text mode, write to it, and close the file.
zdata must be str, not %s�w)r� rC rD N)r� r� r� r� r: r� rL )r# rM rC rD r� r r r �
write_textv s
zPath.write_textTc C sr | j r| j� |r>y| jj| d� W n tk
r8 Y nX dS tjtjB }|sX|tjO }| j ||�}tj
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Create this file with the given access mode, if it doesn't exist.
N) r r r� r� r8 rl �O_CREAT�O_WRONLY�O_EXCLr! �close)r# r� �exist_okr �fdr r r �touch� s
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Path.touchc C s� | j r| j� y| jj| |� W nj tk
rf | s@| j| krB� | jjddd� | j|d|d� Y n& tk
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Create a new directory at this given path.
T)r rU FN)r r r� r� �FileNotFoundErrorr r8 r� )r# r� r rU r r r r� � s z
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Change the permissions of the path, like os.chmod().
N)r r r� r� )r# r� r r r r� � s z
Path.chmodc C s | j r| j� | jj| |� dS )z�
Like chmod(), except if the path points to a symlink, the symlink's
permissions are changed, rather than its target's.
N)r r r� r� )r# r� r r r r� � s z Path.lchmodc C s | j r| j� | jj| � dS )zd
Remove this file or link.
If the path is a directory, use rmdir() instead.
N)r r r� r� )r# r r r r� � s z Path.unlinkc C s | j r| j� | jj| � dS )zF
Remove this directory. The directory must be empty.
N)r r r� r� )r# r r r r� � s z
Path.rmdirc C s | j r| j� | jj| �S )z�
Like stat(), except if the path points to a symlink, the symlink's
status information is returned, rather than its target's.
)r r r� r� )r# r r r r� � s z
Path.lstatc C s | j r| j� | jj| |� dS )z5
Rename this path to the given path.
N)r r r� r� )r# �targetr r r r� � s z Path.renamec C s | j r| j� | jj| |� dS )zo
Rename this path to the given path, clobbering the existing
destination if it exists.
N)r r r� r) )r# rY r r r r) � s z Path.replacec C s" | j r| j� | jj|| |� dS )z�
Make this path a symlink pointing to the given path.
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Whether this path exists.
FNT)r� r8 r2 r r )r# r5 r r r r� � s z Path.existsc C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )z3
Whether this path is a directory.
FN)r r� �st_moder8 r2 r r )r# r5 r r r r� � s z Path.is_dirc C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )zq
Whether this path is a regular file (also True for symlinks pointing
to regular files).
FN)r r� r[ r8 r2 r r )r# r5 r r r �is_file
s z Path.is_filec C sD yt | j� j�S tk
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Whether this path is a symbolic link.
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r� r[ r8 r2 r r )r# r5 r r r r� s zPath.is_symlinkc C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )z6
Whether this path is a block device.
FN)r
r� r[ r8 r2 r r )r# r5 r r r �is_block_device$ s zPath.is_block_devicec C sD yt | j� j�S tk
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Whether this path is a character device.
FN)r r� r[ r8 r2 r r )r# r5 r r r �is_char_device1 s zPath.is_char_devicec C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )z.
Whether this path is a FIFO.
FN)r r� r[ r8 r2 r r )r# r5 r r r �is_fifo> s z Path.is_fifoc C sD yt | j� j�S tk
r> } z|jttfkr0� dS d}~X nX dS )z0
Whether this path is a socket.
FN)r r� r[ r8 r2 r r )r# r5 r r r � is_socketK s zPath.is_socketc C sb | j p
| j r^| jr^| jd dd� dkr^| jj| jd dd� �}| j|g| jdd� �S | S )zl Return a new path with expanded ~ and ~user constructs
(as returned by os.path.expanduser)
r Nr7 �~)r� r� r� r� rr r� )r# Zhomedirr r r r� X s
zPath.expanduser)r� r )N)r )r )FrO )r? rO NNN)NN)NN)r T)r FF)F)1r: r; r< r= r� r� r� r� r r r r r! r r" r# r& r( r+ r- r/ r9 r� r; r> r� rH rI rN rP rW r� r� r� r� r� r� r� r) rZ r� r� r\ r� r] r^ r_ r` r� r r r r r � s^
c @ s e Zd ZdZf ZdS )r zsPath subclass for non-Windows systems.
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N)r: r; r< r= r� r r r r r d s c @ s$ e Zd ZdZf Zdd� Zdd� ZdS )r zqPath subclass for Windows systems.
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c C s t d��d S )Nz*Path.owner() is unsupported on this system)r� )r# r r r r; r s zWindowsPath.ownerc C s t d��d S )Nz*Path.group() is unsupported on this system)r� )r# r r r r> u s zWindowsPath.groupN)r: r; r< r= r� r; r> r r r r r k s )>r� r� rA rt rl r� r� r- � collectionsr �
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c C s� t | �}|| kr | dd� | fS d}x0tt| ��D ] }| ||d � |kr2|d }q2W | d|d � | |d� }}|r�||kr�|| }||fS )z�Split a pathname into two parts: the directory leading up to the final
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L s c C s. t | t�rtj| dtd�S tj| ttt�S d S )Nr& � .)r' r( r9 � _splitextr! r r" )r; r* r* r+ r \ s
c C s | dd� | fS )a@ Split a pathname into a drive specification and the rest of the
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being a separate current directory per drive).Nr r* )r; r* r* r+ r c s c C s t | �d S )Nr )r
)r4 r* r* r+ r
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_osx_support.cpython-36.pyc 0000644 00000022754 15033571514 0011754 0 ustar 00 3
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A single doctest example, consisting of source code and expected
output. `Example` defines the following attributes:
- source: A single Python statement, always ending with a newline.
The constructor adds a newline if needed.
- want: The expected output from running the source code (either
from stdout, or a traceback in case of exception). `want` ends
with a newline unless it's empty, in which case it's an empty
string. The constructor adds a newline if needed.
- exc_msg: The exception message generated by the example, if
the example is expected to generate an exception; or `None` if
it is not expected to generate an exception. This exception
message is compared against the return value of
`traceback.format_exception_only()`. `exc_msg` ends with a
newline unless it's `None`. The constructor adds a newline
if needed.
- lineno: The line number within the DocTest string containing
this Example where the Example begins. This line number is
zero-based, with respect to the beginning of the DocTest.
- indent: The example's indentation in the DocTest string.
I.e., the number of space characters that precede the
example's first prompt.
- options: A dictionary mapping from option flags to True or
False, which is used to override default options for this
example. Any option flags not contained in this dictionary
are left at their default value (as specified by the
DocTestRunner's optionflags). By default, no options are set.
Nr" c C sz |j d�s|d7 }|r*|j d� r*|d7 }|d k rF|j d� rF|d7 }|| _|| _|| _|| _|d krji }|| _|| _d S )NrG )re �sourcerr �linenor[ �options�exc_msg)rf r� rr r� r� r[ r� r+ r+ r, r� � s
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A collection of doctest examples that should be run in a single
namespace. Each `DocTest` defines the following attributes:
- examples: the list of examples.
- globs: The namespace (aka globals) that the examples should
be run in.
- name: A name identifying the DocTest (typically, the name of
the object whose docstring this DocTest was extracted from).
- filename: The name of the file that this DocTest was extracted
from, or `None` if the filename is unknown.
- lineno: The line number within filename where this DocTest
begins, or `None` if the line number is unavailable. This
line number is zero-based, with respect to the beginning of
the file.
- docstring: The string that the examples were extracted from,
or `None` if the string is unavailable.
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Create a new DocTest containing the given examples. The
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zDocTest.__lt__N) r5 rk rl r� r� r� r� r� r� r+ r+ r+ r, r � s c @ s� e Zd ZdZejdejejB �ZejdejejB ej B �Z
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A class used to parse strings containing doctest examples.
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\n?
# Want consists of any non-blank lines that do not start with PS1.
(?P<want> (?:(?![ ]*$) # Not a blank line
(?![ ]*>>>) # Not a line starting with PS1
.+$\n? # But any other line
)*)
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# Grab the traceback header. Different versions of Python have
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\s* $ # toss trailing whitespace on the header.
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^ (?P<msg> \w+ .*) # a line *starts* with alphanum.
z ^[ ]*(#.*)?$�<string>c s |j � }| j|�� � dkr8dj� fdd�|jd�D ��}g }d\}}x�| jj|�D ]�}|j|||j� � � ||jd||j� �7 }| j |||�\}}} }
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Divide the given string into examples and intervening text,
and return them as a list of alternating Examples and strings.
Line numbers for the Examples are 0-based. The optional
argument `name` is a name identifying this string, and is only
used for error messages.
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zDocTestParser.parsec C s t | j||�|||||�S )a"
Extract all doctest examples from the given string, and
collect them into a `DocTest` object.
`globs`, `name`, `filename`, and `lineno` are attributes for
the new `DocTest` object. See the documentation for `DocTest`
for more information.
)r � get_examples)rf r� r0 r* rQ r� r+ r+ r, � get_doctest� s zDocTestParser.get_doctestc C s dd� | j ||�D �S )a�
Extract all doctest examples from the given string, and return
them as a list of `Example` objects. Line numbers are
0-based, because it's most common in doctests that nothing
interesting appears on the same line as opening triple-quote,
and so the first interesting line is called "line 1" then.
The optional argument `name` is a name identifying this
string, and is only used for error messages.
c S s g | ]}t |t�r|�qS r+ )r8 r )r� �xr+ r+ r, r� � s z.DocTestParser.get_examples.<locals>.<listcomp>)r� )rf r� r* r+ r+ r, r� � s zDocTestParser.get_examplesc
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Given a regular expression match from `_EXAMPLE_RE` (`m`),
return a pair `(source, want)`, where `source` is the matched
example's source code (with prompts and indentation stripped);
and `want` is the example's expected output (with indentation
stripped).
`name` is the string's name, and `lineno` is the line number
where the example starts; both are used for error messages.
r[ r� rG r& NrW r} c s g | ]}|� d d� �qS )rV Nr+ )r� Zsl)r[ r+ r, r� � s z0DocTestParser._parse_example.<locals>.<listcomp>rr z *$c s g | ]}|� d � �qS )Nr+ )r� Zwl)r[ r+ r, r� � s r rm rm )
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Return a dictionary containing option overrides extracted from
option directives in the given source string.
`name` is the string's name, and `lineno` is the line number
where the example starts; both are used for error messages.
r& �,rW r" z+-Nz7line %r of the doctest for %s has an invalid option: %r�+zSline %r of the doctest for %s has an option directive on a line with no example: %r)�_OPTION_DIRECTIVE_REr� r� rL ro r' r� r� ) rf r� r* r� r� r� Zoption_strings�option�flagr+ r+ r, r� � s
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^([ ]*)(?=\S)c C s2 dd� | j j|�D �}t|�dkr*t|�S dS dS )z;Return the minimum indentation of any non-blank line in `s`c S s g | ] }t |��qS r+ )r) )r� r[ r+ r+ r, r� s z-DocTestParser._min_indent.<locals>.<listcomp>r" N)�
_INDENT_RE�findallr) �min)rf rZ �indentsr+ r+ r, r� s zDocTestParser._min_indentc C sb x\t |�D ]P\}}t|�|d kr
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Given the lines of a source string (including prompts and
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followed by a space character. If any line is not followed by
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rV rD rW z8line %r of the docstring for %s lacks blank after %s: %rr& N)� enumerater) r� )rf �linesr[ r* r� r� rz r+ r+ r, r�
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Check that every line in the given list starts with the given
prefix; if any line does not, then raise a ValueError.
zGline %r of the docstring for %s has inconsistent leading whitespace: %rr& N)r� rp r� )rf r� �prefixr* r� r� rz r+ r+ r, r� s zDocTestParser._check_prefixN)r� )r� )r5 rk rl r� rX �compile� MULTILINE�VERBOSEr� �DOTALLr� r� r� r� r� r� r� r� r� r� r� r� r� r+ r+ r+ r, r = s"
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A class used to extract the DocTests that are relevant to a given
object, from its docstring and the docstrings of its contained
objects. Doctests can currently be extracted from the following
object types: modules, functions, classes, methods, staticmethods,
classmethods, and properties.
FTc C s || _ || _|| _|| _dS )at
Create a new doctest finder.
The optional argument `parser` specifies a class or
function that should be used to create new DocTest objects (or
objects that implement the same interface as DocTest). The
signature for this factory function should match the signature
of the DocTest constructor.
If the optional argument `recurse` is false, then `find` will
only examine the given object, and not any contained objects.
If the optional argument `exclude_empty` is false, then `find`
will include tests for objects with empty docstrings.
N)�_parser�_verbose�_recurse�_exclude_empty)rf �verbose�parser�recurse�
exclude_emptyr+ r+ r, r� 1 s zDocTestFinder.__init__Nc C sP |dkr.t |dd�}|dkr.tdt|�f ��|dkr<d}n|dkrNtj|�}ytj|�}W n tk
rt d}Y ndX |s�tj|�}|d |d d� dks�d}|dkr�d}n*|dk r�tj ||j
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Return a list of the DocTests that are defined by the given
object's docstring, or by any of its contained objects'
docstrings.
The optional parameter `module` is the module that contains
the given object. If the module is not specified or is None, then
the test finder will attempt to automatically determine the
correct module. The object's module is used:
- As a default namespace, if `globs` is not specified.
- To prevent the DocTestFinder from extracting DocTests
from objects that are imported from other modules.
- To find the name of the file containing the object.
- To help find the line number of the object within its
file.
Contained objects whose module does not match `module` are ignored.
If `module` is False, no attempt to find the module will be made.
This is obscure, of use mostly in tests: if `module` is False, or
is None but cannot be found automatically, then all objects are
considered to belong to the (non-existent) module, so all contained
objects will (recursively) be searched for doctests.
The globals for each DocTest is formed by combining `globs`
and `extraglobs` (bindings in `extraglobs` override bindings
in `globs`). A new copy of the globals dictionary is created
for each DocTest. If `globs` is not specified, then it
defaults to the module's `__dict__`, if specified, or {}
otherwise. If `extraglobs` is not specified, then it defaults
to {}.
Nr5 zJDocTestFinder.find: name must be given when obj.__name__ doesn't exist: %rFr" r3 z<]>r� ���)r/ r� r� r6 � getmoduleZ
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zDocTestFinder.findc C s� |dkr dS t j|�dk r(|t j|�kS t j|�r>|j|jkS t j|�r|t|d�r\|jj}nt|d�rn|j}ndS |j |kS t j
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Return true if the given object is defined in the given
module.
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zDocTestFinder._from_modulec C s( | j rtd| � t|�|kr"dS d|t|�< | j|||||�}|dk rR|j|� tj|�r�| jr�x^|jj � D ]P\} }
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Find tests for the given object and any contained objects, and
add them to `tests`.
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zDocTestFinder._findc C s� t |t�r|}nJy,|jdkr"d}n|j}t |t�s:t|�}W n ttfk
rX d}Y nX | j||�}| jrv| rvdS |dkr�d}n*t|d|j�}|dd� dkr�|dd� }| j j
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Return a DocTest for the given object, if it defines a docstring;
otherwise, return None.
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zDocTestFinder._get_testc C s d}t j|�rd}t j|�rd|dkr(dS tjdt|dd� �}x$t|�D ]\}}|j|�rH|}P qHW t j|�rt|j }t j
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Return a line number of the given object's docstring. Note:
this method assumes that the object has a docstring.
Nr" z^\s*class\s*%s\br5 �-�co_firstlinenor& z(^|.*:)\s*\w*("|\'))r6 r7 r� rX r� r/ r� r� Zismethodr� r� �__code__Z istraceback�tb_frameZisframe�f_codeZiscode�ranger) )rf r� r� r� Zpatr� rz r+ r+ r, r - s<
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A class used to run DocTest test cases, and accumulate statistics.
The `run` method is used to process a single DocTest case. It
returns a tuple `(f, t)`, where `t` is the number of test cases
tried, and `f` is the number of test cases that failed.
>>> tests = DocTestFinder().find(_TestClass)
>>> runner = DocTestRunner(verbose=False)
>>> tests.sort(key = lambda test: test.name)
>>> for test in tests:
... print(test.name, '->', runner.run(test))
_TestClass -> TestResults(failed=0, attempted=2)
_TestClass.__init__ -> TestResults(failed=0, attempted=2)
_TestClass.get -> TestResults(failed=0, attempted=2)
_TestClass.square -> TestResults(failed=0, attempted=1)
The `summarize` method prints a summary of all the test cases that
have been run by the runner, and returns an aggregated `(f, t)`
tuple:
>>> runner.summarize(verbose=1)
4 items passed all tests:
2 tests in _TestClass
2 tests in _TestClass.__init__
2 tests in _TestClass.get
1 tests in _TestClass.square
7 tests in 4 items.
7 passed and 0 failed.
Test passed.
TestResults(failed=0, attempted=7)
The aggregated number of tried examples and failed examples is
also available via the `tries` and `failures` attributes:
>>> runner.tries
7
>>> runner.failures
0
The comparison between expected outputs and actual outputs is done
by an `OutputChecker`. This comparison may be customized with a
number of option flags; see the documentation for `testmod` for
more information. If the option flags are insufficient, then the
comparison may also be customized by passing a subclass of
`OutputChecker` to the constructor.
The test runner's display output can be controlled in two ways.
First, an output function (`out) can be passed to
`TestRunner.run`; this function will be called with strings that
should be displayed. It defaults to `sys.stdout.write`. If
capturing the output is not sufficient, then the display output
can be also customized by subclassing DocTestRunner, and
overriding the methods `report_start`, `report_success`,
`report_unexpected_exception`, and `report_failure`.
r4 �F Nr" c C sN |pt � | _|dkr dtjk}|| _|| _|| _d| _d| _i | _ t
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Create a new test runner.
Optional keyword arg `checker` is the `OutputChecker` that
should be used to compare the expected outputs and actual
outputs of doctest examples.
Optional keyword arg 'verbose' prints lots of stuff if true,
only failures if false; by default, it's true iff '-v' is in
sys.argv.
Optional argument `optionflags` can be used to control how the
test runner compares expected output to actual output, and how
it displays failures. See the documentation for `testmod` for
more information.
Nz-vr" ) r �_checkerr= r� r� � optionflags�original_optionflags�tries�failures�_name2ftrd �_fakeout)rf �checkerr� r r+ r+ r, r� � s
zDocTestRunner.__init__c C sH | j rD|jr.|dt|j� d t|j� � n|dt|j� d � dS )z�
Report that the test runner is about to process the given
example. (Only displays a message if verbose=True)
zTrying:
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N)r� rr r\ r� )rf r� r� �exampler+ r+ r, � report_start� s zDocTestRunner.report_startc C s | j r|d� dS )zt
Report that the given example ran successfully. (Only
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zok
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Report that the given example failed.
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Report that the given example raised an unexpected exception.
zException raised:
N)r r\ rc )rf r� r� r ra r+ r+ r, �report_unexpected_exception� s z)DocTestRunner.report_unexpected_exceptionc C s� | j g}|jrR|jd k r4|jd k r4|j|j d }nd}|jd|j||jf � n|jd|jd |jf � |jd� |j}|jt|�� dj|�S )Nr& �?zFile "%s", line %s, in %szLine %s, in %szFailed example:rG )�DIVIDERrQ r� r� r* r� r\ r� )rf r� r r� r� r� r+ r+ r, r � s
z DocTestRunner._failure_headerc C s� d }}| j }td�\}}} | jj}
�xFt|j�D �]6\} } | j t@ oL|dk}
|| _ | jr�x:| jj� D ],\}}|r�| j |O _ qf| j | M _ qfW | j t @ r�q2|d7 }|
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�sZ| j ||| |� nT||k�r0|
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�sP| j!||| |� |d7 }n |r2| j t"@ r2P q2W || _ | j#|||� t$||�S ) a�
Run the examples in `test`. Write the outcome of each example
with one of the `DocTestRunner.report_*` methods, using the
writer function `out`. `compileflags` is the set of compiler
flags that should be used to execute examples. Return a tuple
`(f, t)`, where `t` is the number of examples tried, and `f`
is the number of examples that failed. The examples are run
in the namespace `test.globs`.
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Run the examples in `test`, and display the results using the
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`clear_globs` is true (the default), then this namespace will
be cleared after the test runs, to help with garbage
collection. If you would like to examine the namespace after
the test completes, then use `clear_globs=False`.
`compileflags` gives the set of flags that should be used by
the Python compiler when running the examples. If not
specified, then it will default to the set of future-import
flags that apply to `globs`.
The output of each example is checked using
`DocTestRunner.check_output`, and the results are formatted by
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Print a summary of all the test cases that have been run by
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summary is. If the verbosity is not specified, then the
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A class used to check the whether the actual output from a doctest
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methods: `check_output`, which compares a given pair of outputs,
and returns true if they match; and `output_difference`, which
returns a string describing the differences between two outputs.
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Return True iff the actual output from an example (`got`)
matches the expected output (`want`). These strings are
always considered to match if they are identical; but
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documentation for `TestRunner` for more information about
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T�True
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Return a string describing the differences between the
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z(?m)^[ ]*(?=
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?c @ s e Zd ZdZdd� Zdd� ZdS )r z�A DocTest example has failed in debugging mode.
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c C s || _ || _|| _d S )N)r� r rs )rf r� r rs r+ r+ r, r� � s zDocTestFailure.__init__c C s
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c @ s e Zd ZdZdd� Zdd� ZdS )r z�A DocTest example has encountered an unexpected exception
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c C s || _ || _|| _d S )N)r� r ra )rf r� r ra r+ r+ r, r� � s z UnexpectedException.__init__c C s
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dd�Zdd� Zdd � ZdS ) r a� Run doc tests but raise an exception as soon as there is a failure.
If an unexpected exception occurs, an UnexpectedException is raised.
It contains the test, the example, and the original exception:
>>> runner = DebugRunner(verbose=False)
>>> test = DocTestParser().get_doctest('>>> raise KeyError\n42',
... {}, 'foo', 'foo.py', 0)
>>> try:
... runner.run(test)
... except UnexpectedException as f:
... failure = f
>>> failure.test is test
True
>>> failure.example.want
'42\n'
>>> exc_info = failure.exc_info
>>> raise exc_info[1] # Already has the traceback
Traceback (most recent call last):
...
KeyError
We wrap the original exception to give the calling application
access to the test and example information.
If the output doesn't match, then a DocTestFailure is raised:
>>> test = DocTestParser().get_doctest('''
... >>> x = 1
... >>> x
... 2
... ''', {}, 'foo', 'foo.py', 0)
>>> try:
... runner.run(test)
... except DocTestFailure as f:
... failure = f
DocTestFailure objects provide access to the test:
>>> failure.test is test
True
As well as to the example:
>>> failure.example.want
'2\n'
and the actual output:
>>> failure.got
'1\n'
If a failure or error occurs, the globals are left intact:
>>> del test.globs['__builtins__']
>>> test.globs
{'x': 1}
>>> test = DocTestParser().get_doctest('''
... >>> x = 2
... >>> raise KeyError
... ''', {}, 'foo', 'foo.py', 0)
>>> runner.run(test)
Traceback (most recent call last):
...
doctest.UnexpectedException: <DocTest foo from foo.py:0 (2 examples)>
>>> del test.globs['__builtins__']
>>> test.globs
{'x': 2}
But the globals are cleared if there is no error:
>>> test = DocTestParser().get_doctest('''
... >>> x = 2
... ''', {}, 'foo', 'foo.py', 0)
>>> runner.run(test)
TestResults(failed=0, attempted=1)
>>> test.globs
{}
NTc C s$ t j| |||d�}|r |jj� |S )NF)r r? r0 r; )rf r� r" r� r> �rr+ r+ r, r? . s
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m=None, name=None, globs=None, verbose=None, report=True,
optionflags=0, extraglobs=None, raise_on_error=False,
exclude_empty=False
Test examples in docstrings in functions and classes reachable
from module m (or the current module if m is not supplied), starting
with m.__doc__.
Also test examples reachable from dict m.__test__ if it exists and is
not None. m.__test__ maps names to functions, classes and strings;
function and class docstrings are tested even if the name is private;
strings are tested directly, as if they were docstrings.
Return (#failures, #tests).
See help(doctest) for an overview.
Optional keyword arg "name" gives the name of the module; by default
use m.__name__.
Optional keyword arg "globs" gives a dict to be used as the globals
when executing examples; by default, use m.__dict__. A copy of this
dict is actually used for each docstring, so that each docstring's
examples start with a clean slate.
Optional keyword arg "extraglobs" gives a dictionary that should be
merged into the globals that are used to execute examples. By
default, no extra globals are used. This is new in 2.4.
Optional keyword arg "verbose" prints lots of stuff if true, prints
only failures if false; by default, it's true iff "-v" is in sys.argv.
Optional keyword arg "report" prints a summary at the end when true,
else prints nothing at the end. In verbose mode, the summary is
detailed, else very brief (in fact, empty if all tests passed).
Optional keyword arg "optionflags" or's together module constants,
and defaults to 0. This is new in 2.3. Possible values (see the
docs for details):
DONT_ACCEPT_TRUE_FOR_1
DONT_ACCEPT_BLANKLINE
NORMALIZE_WHITESPACE
ELLIPSIS
SKIP
IGNORE_EXCEPTION_DETAIL
REPORT_UDIFF
REPORT_CDIFF
REPORT_NDIFF
REPORT_ONLY_FIRST_FAILURE
Optional keyword arg "raise_on_error" raises an exception on the
first unexpected exception or failure. This allows failures to be
post-mortem debugged.
Advanced tomfoolery: testmod runs methods of a local instance of
class doctest.Tester, then merges the results into (or creates)
global Tester instance doctest.master. Methods of doctest.master
can be called directly too, if you want to do something unusual.
Passing report=0 to testmod is especially useful then, to delay
displaying a summary. Invoke doctest.master.summarize(verbose)
when you're done fiddling.
Nr� z testmod: module required; %r)r� )r� r )r0 r� )r= r> r. r6 r7 rA r5 r r r rq r? rA �masterrC r% r r ) r� r* r0 r� �reportr r� �raise_on_errorr� �finder�runnerr� r+ r+ r, r C s$ E
c C s� |r| rt d��t| ||| p d�\} } |dkr<tjj| �}|dkrJi }n|j� }|dk rd|j|� d|krtd|d< | r�t||d�}
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Test examples in the given file. Return (#failures, #tests).
Optional keyword arg "module_relative" specifies how filenames
should be interpreted:
- If "module_relative" is True (the default), then "filename"
specifies a module-relative path. By default, this path is
relative to the calling module's directory; but if the
"package" argument is specified, then it is relative to that
package. To ensure os-independence, "filename" should use
"/" characters to separate path segments, and should not
be an absolute path (i.e., it may not begin with "/").
- If "module_relative" is False, then "filename" specifies an
os-specific path. The path may be absolute or relative (to
the current working directory).
Optional keyword arg "name" gives the name of the test; by default
use the file's basename.
Optional keyword argument "package" is a Python package or the
name of a Python package whose directory should be used as the
base directory for a module relative filename. If no package is
specified, then the calling module's directory is used as the base
directory for module relative filenames. It is an error to
specify "package" if "module_relative" is False.
Optional keyword arg "globs" gives a dict to be used as the globals
when executing examples; by default, use {}. A copy of this dict
is actually used for each docstring, so that each docstring's
examples start with a clean slate.
Optional keyword arg "extraglobs" gives a dictionary that should be
merged into the globals that are used to execute examples. By
default, no extra globals are used.
Optional keyword arg "verbose" prints lots of stuff if true, prints
only failures if false; by default, it's true iff "-v" is in sys.argv.
Optional keyword arg "report" prints a summary at the end when true,
else prints nothing at the end. In verbose mode, the summary is
detailed, else very brief (in fact, empty if all tests passed).
Optional keyword arg "optionflags" or's together module constants,
and defaults to 0. Possible values (see the docs for details):
DONT_ACCEPT_TRUE_FOR_1
DONT_ACCEPT_BLANKLINE
NORMALIZE_WHITESPACE
ELLIPSIS
SKIP
IGNORE_EXCEPTION_DETAIL
REPORT_UDIFF
REPORT_CDIFF
REPORT_NDIFF
REPORT_ONLY_FIRST_FAILURE
Optional keyword arg "raise_on_error" raises an exception on the
first unexpected exception or failure. This allows failures to be
post-mortem debugged.
Optional keyword arg "parser" specifies a DocTestParser (or
subclass) that should be used to extract tests from the files.
Optional keyword arg "encoding" specifies an encoding that should
be used to convert the file to unicode.
Advanced tomfoolery: testmod runs methods of a local instance of
class doctest.Tester, then merges the results into (or creates)
global Tester instance doctest.master. Methods of doctest.master
can be called directly too, if you want to do something unusual.
Passing report=0 to testmod is especially useful then, to delay
displaying a summary. Invoke doctest.master.summarize(verbose)
when you're done fiddling.
z8Package may only be specified for module-relative paths.zutf-8Nr5 r� )r� r r" )r� rU rM r� �basenamer� r� r r r� r? rA rR rC r% r r )rQ rS r* rR r0 r� rS r r� rT r� rH �textrV r� r+ r+ r, r � s0 R
�NoNamec C sD t |dd�}t||d�}x&|j| ||d�D ]}|j||d� q*W dS )ar
Test examples in the given object's docstring (`f`), using `globs`
as globals. Optional argument `name` is used in failure messages.
If the optional argument `verbose` is true, then generate output
even if there are no failures.
`compileflags` gives the set of flags that should be used by the
Python compiler when running the examples. If not specified, then
it will default to the set of future-import flags that apply to
`globs`.
Optional keyword arg `optionflags` specifies options for the
testing and output. See the documentation for `testmod` for more
information.
F)r� r� )r� r )r0 )r" N)r r rq r? ) rT r0 r� r* r" r rU rV r� r+ r+ r, r & s c C s" | t @ | krtd| ��t}| a|S )a? Sets the unittest option flags.
The old flag is returned so that a runner could restore the old
value if it wished to:
>>> import doctest
>>> old = doctest._unittest_reportflags
>>> doctest.set_unittest_reportflags(REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE) == old
True
>>> doctest._unittest_reportflags == (REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE)
True
Only reporting flags can be set:
>>> doctest.set_unittest_reportflags(ELLIPSIS)
Traceback (most recent call last):
...
ValueError: ('Only reporting flags allowed', 8)
>>> doctest.set_unittest_reportflags(old) == (REPORT_NDIFF |
... REPORT_ONLY_FIRST_FAILURE)
True
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zDocTestCase.format_failurec C s6 | j � t| j| jdd�}|j| jdd� | j� dS )a� Run the test case without results and without catching exceptions
The unit test framework includes a debug method on test cases
and test suites to support post-mortem debugging. The test code
is run in such a way that errors are not caught. This way a
caller can catch the errors and initiate post-mortem debugging.
The DocTestCase provides a debug method that raises
UnexpectedException errors if there is an unexpected
exception:
>>> test = DocTestParser().get_doctest('>>> raise KeyError\n42',
... {}, 'foo', 'foo.py', 0)
>>> case = DocTestCase(test)
>>> try:
... case.debug()
... except UnexpectedException as f:
... failure = f
The UnexpectedException contains the test, the example, and
the original exception:
>>> failure.test is test
True
>>> failure.example.want
'42\n'
>>> exc_info = failure.exc_info
>>> raise exc_info[1] # Already has the traceback
Traceback (most recent call last):
...
KeyError
If the output doesn't match, then a DocTestFailure is raised:
>>> test = DocTestParser().get_doctest('''
... >>> x = 1
... >>> x
... 2
... ''', {}, 'foo', 'foo.py', 0)
>>> case = DocTestCase(test)
>>> try:
... case.debug()
... except DocTestFailure as f:
... failure = f
DocTestFailure objects provide access to the test:
>>> failure.test is test
True
As well as to the example:
>>> failure.example.want
'2\n'
and the actual output:
>>> failure.got
'1\n'
F)r r r� )r> N)rd r r_ r` r? ra re )rf rV r+ r+ r, r! � s
B zDocTestCase.debugc C s | j jS )N)ra r* )rf r+ r+ r, r� � s zDocTestCase.idc C sP t | �t |�k rtS | j|jkoN| j|jkoN| j|jkoN| j|jkoN| j|jkS )N)r� r� ra r_ rb rc r` )rf r� r+ r+ r, r� � s zDocTestCase.__eq__c C s t | j| j| j| jf�S )N)r� r_ rb rc r` )rf r+ r+ r, r� � s zDocTestCase.__hash__c C s, | j jjd�}d|d dj|d d� �f S )Nr} z%s (%s)r& rm rm )ra r* ro r� )rf r* r+ r+ r, r� � s zDocTestCase.__repr__c C s d| j j S )Nz Doctest: )ra r* )rf r+ r+ r, �shortDescription s z DocTestCase.shortDescription)r" NNN)r5 rk rl r� rd re rh rf r! r� r� r� r� rP rj r+ r+ r+ r, r\ g s
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�SkipDocTestCasec C s || _ tj| d � d S )N)rB r\ r� )rf rB r+ r+ r, r� s zSkipDocTestCase.__init__c C s | j d� d S )Nz-DocTestSuite will not work with -O2 and above)ZskipTest)rf r+ r+ r, rd s zSkipDocTestCase.setUpc C s d S )Nr+ )rf r+ r+ r, � test_skip s zSkipDocTestCase.test_skipc C s d| j j S )NzSkipping tests from %s)rB r5 )rf r+ r+ r, rj s z SkipDocTestCase.shortDescriptionN)r5 rk rl r� rd rl rj rP r+ r+ r+ r, rk s
rk c @ s e Zd Zdd� ZdS )�
_DocTestSuitec C s d S )Nr+ )rf �indexr+ r+ r, �_removeTestAtIndex s z _DocTestSuite._removeTestAtIndexN)r5 rk rl ro r+ r+ r+ r, rm s rm c K s� |dkrt � }t| �} |j| ||d�}| rPtjjdkrPt� }|jt| �� |S |j � t� }x\|D ]T}t
|j �dkrxqd|j s�| j
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Convert doctest tests for a module to a unittest test suite.
This converts each documentation string in a module that
contains doctest tests to a unittest test case. If any of the
tests in a doc string fail, then the test case fails. An exception
is raised showing the name of the file containing the test and a
(sometimes approximate) line number.
The `module` argument provides the module to be tested. The argument
can be either a module or a module name.
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globs attribute of the test passed.
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A tear-down function. This is called after running the
tests in each file. The tearDown function will be passed a DocTest
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globs
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optionflags
A set of doctest option flags expressed as an integer.
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globs
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... Here are examples of simple math.
...
... Python has super accurate integer addition
...
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... 5
...
... And very friendly error messages:
...
... >>> 1/0
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... '''
>>> print(script_from_examples(text))
# Here are examples of simple math.
#
# Python has super accurate integer addition
#
2 + 2
# Expected:
## 5
#
# And very friendly error messages:
#
1/0
# Expected:
## To Infinity
## And
## Beyond
#
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#
if 0:
blah
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Thread-local objects support the management of thread-local data.
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>>> mydata = local()
>>> mydata.number = 42
>>> mydata.number
42
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>>> mydata.__dict__
{'number': 42}
>>> mydata.__dict__.setdefault('widgets', [])
[]
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[]
What's important about thread-local objects is that their data are
local to a thread. If we access the data in a different thread:
>>> log = []
>>> def f():
... items = sorted(mydata.__dict__.items())
... log.append(items)
... mydata.number = 11
... log.append(mydata.number)
>>> import threading
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
>>> log
[[], 11]
we get different data. Furthermore, changes made in the other thread
don't affect data seen in this thread:
>>> mydata.number
42
Of course, values you get from a local object, including a __dict__
attribute, are for whatever thread was current at the time the
attribute was read. For that reason, you generally don't want to save
these values across threads, as they apply only to the thread they
came from.
You can create custom local objects by subclassing the local class:
>>> class MyLocal(local):
... number = 2
... def __init__(self, **kw):
... self.__dict__.update(kw)
... def squared(self):
... return self.number ** 2
This can be useful to support default values, methods and
initialization. Note that if you define an __init__ method, it will be
called each time the local object is used in a separate thread. This
is necessary to initialize each thread's dictionary.
Now if we create a local object:
>>> mydata = MyLocal(color='red')
Now we have a default number:
>>> mydata.number
2
an initial color:
>>> mydata.color
'red'
>>> del mydata.color
And a method that operates on the data:
>>> mydata.squared()
4
As before, we can access the data in a separate thread:
>>> log = []
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
>>> log
[[('color', 'red')], 11]
without affecting this thread's data:
>>> mydata.number
2
>>> mydata.color
Traceback (most recent call last):
...
AttributeError: 'MyLocal' object has no attribute 'color'
Note that subclasses can define slots, but they are not thread
local. They are shared across threads:
>>> class MyLocal(local):
... __slots__ = 'number'
>>> mydata = MyLocal()
>>> mydata.number = 42
>>> mydata.color = 'red'
So, the separate thread:
>>> thread = threading.Thread(target=f)
>>> thread.start()
>>> thread.join()
affects what we see:
>>> mydata.number
11
>>> del mydata
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e!�Z$dS )+ap Generic socket server classes.
This module tries to capture the various aspects of defining a server:
For socket-based servers:
- address family:
- AF_INET{,6}: IP (Internet Protocol) sockets (default)
- AF_UNIX: Unix domain sockets
- others, e.g. AF_DECNET are conceivable (see <socket.h>
- socket type:
- SOCK_STREAM (reliable stream, e.g. TCP)
- SOCK_DGRAM (datagrams, e.g. UDP)
For request-based servers (including socket-based):
- client address verification before further looking at the request
(This is actually a hook for any processing that needs to look
at the request before anything else, e.g. logging)
- how to handle multiple requests:
- synchronous (one request is handled at a time)
- forking (each request is handled by a new process)
- threading (each request is handled by a new thread)
The classes in this module favor the server type that is simplest to
write: a synchronous TCP/IP server. This is bad class design, but
save some typing. (There's also the issue that a deep class hierarchy
slows down method lookups.)
There are five classes in an inheritance diagram, four of which represent
synchronous servers of four types:
+------------+
| BaseServer |
+------------+
|
v
+-----------+ +------------------+
| TCPServer |------->| UnixStreamServer |
+-----------+ +------------------+
|
v
+-----------+ +--------------------+
| UDPServer |------->| UnixDatagramServer |
+-----------+ +--------------------+
Note that UnixDatagramServer derives from UDPServer, not from
UnixStreamServer -- the only difference between an IP and a Unix
stream server is the address family, which is simply repeated in both
unix server classes.
Forking and threading versions of each type of server can be created
using the ForkingMixIn and ThreadingMixIn mix-in classes. For
instance, a threading UDP server class is created as follows:
class ThreadingUDPServer(ThreadingMixIn, UDPServer): pass
The Mix-in class must come first, since it overrides a method defined
in UDPServer! Setting the various member variables also changes
the behavior of the underlying server mechanism.
To implement a service, you must derive a class from
BaseRequestHandler and redefine its handle() method. You can then run
various versions of the service by combining one of the server classes
with your request handler class.
The request handler class must be different for datagram or stream
services. This can be hidden by using the request handler
subclasses StreamRequestHandler or DatagramRequestHandler.
Of course, you still have to use your head!
For instance, it makes no sense to use a forking server if the service
contains state in memory that can be modified by requests (since the
modifications in the child process would never reach the initial state
kept in the parent process and passed to each child). In this case,
you can use a threading server, but you will probably have to use
locks to avoid two requests that come in nearly simultaneous to apply
conflicting changes to the server state.
On the other hand, if you are building e.g. an HTTP server, where all
data is stored externally (e.g. in the file system), a synchronous
class will essentially render the service "deaf" while one request is
being handled -- which may be for a very long time if a client is slow
to read all the data it has requested. Here a threading or forking
server is appropriate.
In some cases, it may be appropriate to process part of a request
synchronously, but to finish processing in a forked child depending on
the request data. This can be implemented by using a synchronous
server and doing an explicit fork in the request handler class
handle() method.
Another approach to handling multiple simultaneous requests in an
environment that supports neither threads nor fork (or where these are
too expensive or inappropriate for the service) is to maintain an
explicit table of partially finished requests and to use a selector to
decide which request to work on next (or whether to handle a new
incoming request). This is particularly important for stream services
where each client can potentially be connected for a long time (if
threads or subprocesses cannot be used).
Future work:
- Standard classes for Sun RPC (which uses either UDP or TCP)
- Standard mix-in classes to implement various authentication
and encryption schemes
XXX Open problems:
- What to do with out-of-band data?
BaseServer:
- split generic "request" functionality out into BaseServer class.
Copyright (C) 2000 Luke Kenneth Casson Leighton <lkcl@samba.org>
example: read entries from a SQL database (requires overriding
get_request() to return a table entry from the database).
entry is processed by a RequestHandlerClass.
z0.4� N)�BufferedIOBase)� monotonic�
BaseServer� TCPServer� UDPServer�ThreadingUDPServer�ThreadingTCPServer�BaseRequestHandler�StreamRequestHandler�DatagramRequestHandler�ThreadingMixIn�fork�ForkingUDPServer�ForkingTCPServer� ForkingMixIn�AF_UNIX�UnixStreamServer�UnixDatagramServer�ThreadingUnixStreamServer�ThreadingUnixDatagramServer� PollSelectorc @ s� e Zd ZdZdZdd� Zdd� Zd&dd �Zd
d � Zd d
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dd� Z dd� Z dd� Z
dd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� ZdS )'r a� Base class for server classes.
Methods for the caller:
- __init__(server_address, RequestHandlerClass)
- serve_forever(poll_interval=0.5)
- shutdown()
- handle_request() # if you do not use serve_forever()
- fileno() -> int # for selector
Methods that may be overridden:
- server_bind()
- server_activate()
- get_request() -> request, client_address
- handle_timeout()
- verify_request(request, client_address)
- server_close()
- process_request(request, client_address)
- shutdown_request(request)
- close_request(request)
- service_actions()
- handle_error()
Methods for derived classes:
- finish_request(request, client_address)
Class variables that may be overridden by derived classes or
instances:
- timeout
- address_family
- socket_type
- allow_reuse_address
Instance variables:
- RequestHandlerClass
- socket
Nc C s || _ || _tj� | _d| _dS )z/Constructor. May be extended, do not override.FN)�server_address�RequestHandlerClass� threadingZEvent�_BaseServer__is_shut_down� _BaseServer__shutdown_request)�selfr r � r �$/usr/lib64/python3.6/socketserver.py�__init__� s
zBaseServer.__init__c C s dS )zSCalled by constructor to activate the server.
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Nr )r r r r �server_activate� s zBaseServer.server_activate� �?c C sx | j j� zVt� �F}|j| tj� x0| jsR|j|�}| jr<P |rH| j� | j � q$W W dQ R X W dd| _| j j
� X dS )z�Handle one request at a time until shutdown.
Polls for shutdown every poll_interval seconds. Ignores
self.timeout. If you need to do periodic tasks, do them in
another thread.
NF) r �clear�_ServerSelector�register� selectors�
EVENT_READr �select�_handle_request_noblock�service_actions�set)r Z
poll_interval�selector�readyr r r �
serve_forever� s
zBaseServer.serve_foreverc C s d| _ | jj� dS )z�Stops the serve_forever loop.
Blocks until the loop has finished. This must be called while
serve_forever() is running in another thread, or it will
deadlock.
TN)r r �wait)r r r r �shutdown� s zBaseServer.shutdownc C s dS )z�Called by the serve_forever() loop.
May be overridden by a subclass / Mixin to implement any code that
needs to be run during the loop.
Nr )r r r r r) s zBaseServer.service_actionsc
C s� | j j� }|dkr| j}n| jdk r0t|| j�}|dk rBt� | }t� �R}|j| tj� x<|j |�}|rp| j
� S |dk rZ|t� }|dk rZ| j � S qZW W dQ R X dS )zOHandle one request, possibly blocking.
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Nr ) �socketZ
gettimeout�timeout�min�timer# r$ r% r& r' r( �handle_timeout)r r1 Zdeadliner+ r, r r r �handle_request s"
zBaseServer.handle_requestc C s� y| j � \}}W n tk
r$ dS X | j||�r�y| j||� W q� tk
rl | j||� | j|� Y q� | j|� � Y q�X n
| j|� dS )z�Handle one request, without blocking.
I assume that selector.select() has returned that the socket is
readable before this function was called, so there should be no risk of
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N)� get_request�OSError�verify_request�process_request� Exception� handle_error�shutdown_request)r �request�client_addressr r r r( 3 s
z"BaseServer._handle_request_noblockc C s dS )zcCalled if no new request arrives within self.timeout.
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Nr )r r r r r4 J s zBaseServer.handle_timeoutc C s dS )znVerify the request. May be overridden.
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Tr )r r= r> r r r r8 Q s zBaseServer.verify_requestc C s | j ||� | j|� dS )zVCall finish_request.
Overridden by ForkingMixIn and ThreadingMixIn.
N)�finish_requestr< )r r= r> r r r r9 Y s zBaseServer.process_requestc C s dS )zDCalled to clean-up the server.
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Nr )r r r r � server_closeb s zBaseServer.server_closec C s | j ||| � dS )z8Finish one request by instantiating RequestHandlerClass.N)r )r r= r> r r r r? j s zBaseServer.finish_requestc C s | j |� dS )z3Called to shutdown and close an individual request.N)�
close_request)r r= r r r r< n s zBaseServer.shutdown_requestc C s dS )z)Called to clean up an individual request.Nr )r r= r r r rA r s zBaseServer.close_requestc C sH t dd tjd� t d|tjd� ddl}|j� t dd tjd� dS )ztHandle an error gracefully. May be overridden.
The default is to print a traceback and continue.
�-�( )�filez4Exception happened during processing of request fromr N)�print�sys�stderr� traceback� print_exc)r r= r> rH r r r r; v s zBaseServer.handle_errorc C s | S )Nr )r r r r � __enter__� s zBaseServer.__enter__c G s | j � d S )N)r@ )r �argsr r r �__exit__� s zBaseServer.__exit__)r! )�__name__�
__module__� __qualname__�__doc__r1 r r r- r/ r) r5 r( r4 r8 r9 r@ r? r< rA r; rJ rL r r r r r � s& +
c @ sf e Zd ZdZejZejZdZ dZ
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d� Zdd� Zdd� Zdd� ZdS )r a3 Base class for various socket-based server classes.
Defaults to synchronous IP stream (i.e., TCP).
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- __init__(server_address, RequestHandlerClass, bind_and_activate=True)
- serve_forever(poll_interval=0.5)
- shutdown()
- handle_request() # if you don't use serve_forever()
- fileno() -> int # for selector
Methods that may be overridden:
- server_bind()
- server_activate()
- get_request() -> request, client_address
- handle_timeout()
- verify_request(request, client_address)
- process_request(request, client_address)
- shutdown_request(request)
- close_request(request)
- handle_error()
Methods for derived classes:
- finish_request(request, client_address)
Class variables that may be overridden by derived classes or
instances:
- timeout
- address_family
- socket_type
- request_queue_size (only for stream sockets)
- allow_reuse_address
Instance variables:
- server_address
- RequestHandlerClass
- socket
� FTc C sT t j| ||� tj| j| j�| _|rPy| j� | j� W n | j� � Y nX dS )z/Constructor. May be extended, do not override.N)r r r0 �address_family� socket_type� server_bindr r@ )r r r Zbind_and_activater r r r � s
zTCPServer.__init__c C s8 | j r| jjtjtjd� | jj| j� | jj� | _dS )zOCalled by constructor to bind the socket.
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� N)�allow_reuse_addressr0 �
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SOL_SOCKETZ SO_REUSEADDRZbindr Z getsockname)r r r r rT � s zTCPServer.server_bindc C s | j j| j� dS )zSCalled by constructor to activate the server.
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N)r0 Zlisten�request_queue_size)r r r r r � s zTCPServer.server_activatec C s | j j� dS )zDCalled to clean-up the server.
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N)r0 �close)r r r r r@ � s zTCPServer.server_closec C s
| j j� S )zMReturn socket file number.
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)r0 �fileno)r r r r rZ � s zTCPServer.filenoc C s
| j j� S )zYGet the request and client address from the socket.
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md5(), sha1(), sha224(), sha256(), sha384(), sha512(), blake2b(), blake2s(),
sha3_224, sha3_256, sha3_384, sha3_512, shake_128, and shake_256.
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initial substring.
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>>> import hashlib
>>> m = hashlib.md5()
>>> m.update(b"Nobody inspects")
>>> m.update(b" the spammish repetition")
>>> m.digest()
b'\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9'
More condensed:
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'a4337bc45a8fc544c03f52dc550cd6e1e87021bc896588bd79e901e2'
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[IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'),
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ip4 = IPv4Network('192.0.2.192/26')
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dd� Zedd� �Zedd� �Zed d � �Zed d � �Zed d!� �Zed"d#� �Zed$d%� �Zed&d'� �Zd(d)� Zd*d+� Zd,d-� ZdBd0d1�ZdCd2d3�Z ed4d5� �Z ed6d7� �Z ed8d9� �Z ed:d;� �Z ed<d=� �Z!ed>d?� �Z"ed@dA� �Z#d/S )DrO z~A generic IP network object.
This IP class contains the version independent methods which are
used by networks.
c C s
i | _ d S )N)�_cache)rW r r r r
�__init___ s z_BaseNetwork.__init__c C s d| j jt| �f S )Nz%s(%r))rp r r! )rW r r r
r{ b s z_BaseNetwork.__repr__c C s d| j | jf S )Nz%s/%d)rK rb )rW r r r
r} e s z_BaseNetwork.__str__c c s< t | j�}t | j�}x"t|d |�D ]}| j|�V q$W dS )z�Generate Iterator over usable hosts in a network.
This is like __iter__ except it doesn't return the network
or broadcast addresses.
r& N)rk rK rD �range�_address_class)rW �network� broadcast�xr r r
�hostsh s
z_BaseNetwork.hostsc c s< t | j�}t | j�}x"t||d �D ]}| j|�V q$W d S )Nr& )rk rK rD r� r� )rW r� r� r� r r r
�__iter__t s
z_BaseNetwork.__iter__c C sl t | j�}t | j�}|dkr>|| |kr0td��| j|| �S |d7 }|| |k rZtd��| j|| �S d S )Nr zaddress out of ranger& )rk rK rD �
IndexErrorr� )rW �nr� r� r r r
� __getitem__z s
z_BaseNetwork.__getitem__c C s^ t |t�stS | j|jkr*td| |f ��| j|jkrB| j|jk S | j|jkrZ| j|jk S dS )Nz%%s and %s are not of the same versionF)r5 rO rR rH r7 rK �netmask)rW rv r r r
rx � s
z_BaseNetwork.__lt__c C sF y,| j |j ko,| j|jko,t| j�t|j�kS tk
r@ tS X d S )N)rH rK rk r� rJ rR )rW rv r r r
rw � s z_BaseNetwork.__eq__c C s t t| j�t| j�A �S )N)r~ rk rK r� )rW r r r
r� � s z_BaseNetwork.__hash__c C sL | j |j krdS t|t�r dS t| j�t|j� koBt| j�kS S d S )NF)rH r5 rO rk rK r) rD )rW rv r r r
� __contains__� s
z_BaseNetwork.__contains__c C s( | j |kp&| j|kp&|j | kp&|j| kS )z*Tell if self is partly contained in other.)rK rD )rW rv r r r
�overlaps� s
z_BaseNetwork.overlapsc C s< | j jd�}|d kr8| jt| j�t| j�B �}|| j d< |S )NrD )r� r@ r� rk rK �hostmask)rW r� r r r
rD � s
z _BaseNetwork.broadcast_addressc C s8 | j jd�}|d kr4| jt| j�| jA �}|| j d< |S )Nr� )r� r@ r� rk r� r: )rW r� r r r
r� � s
z_BaseNetwork.hostmaskc C s d| j | jf S )Nz%s/%d)rK rI )rW r r r
�with_prefixlen� s z_BaseNetwork.with_prefixlenc C s d| j | jf S )Nz%s/%s)rK r� )rW r r r
� with_netmask� s z_BaseNetwork.with_netmaskc C s d| j | jf S )Nz%s/%s)rK r� )rW r r r
�
with_hostmask� s z_BaseNetwork.with_hostmaskc C s t | j�t | j� d S )z&Number of hosts in the current subnet.r& )rk rD rK )rW r r r
�
num_addresses� s z_BaseNetwork.num_addressesc C s dt | �f }t|��d S )Nz%%200s has no associated address class)r\ r] )rW r^ r r r
r� � s z_BaseNetwork._address_classc C s | j S )N)rI )rW r r r
rb � s z_BaseNetwork.prefixlenc c sD | j |j ks td| |f ��t|t�s2td| ��|j| jkoH|j| jksZtd|| f ��|| krfdS |jd|j|jf �}| j � \}}x�||ko�||k�r|j|jkr�|j|jkr�|V |j � \}}q�|j|jkr�|j|jkr�|V |j � \}}q�t
d|||f ��q�W ||k�r |V n$||k�r.|V nt
d|||f ��dS )a� Remove an address from a larger block.
For example:
addr1 = ip_network('192.0.2.0/28')
addr2 = ip_network('192.0.2.1/32')
list(addr1.address_exclude(addr2)) =
[IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'),
IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')]
or IPv6:
addr1 = ip_network('2001:db8::1/32')
addr2 = ip_network('2001:db8::1/128')
list(addr1.address_exclude(addr2)) =
[ip_network('2001:db8::1/128'),
ip_network('2001:db8::2/127'),
ip_network('2001:db8::4/126'),
ip_network('2001:db8::8/125'),
...
ip_network('2001:db8:8000::/33')]
Args:
other: An IPv4Network or IPv6Network object of the same type.
Returns:
An iterator of the IPv(4|6)Network objects which is self
minus other.
Raises:
TypeError: If self and other are of differing address
versions, or if other is not a network object.
ValueError: If other is not completely contained by self.
z%%s and %s are not of the same versionz%s is not a network objectz%s not contained in %sNz%s/%sz3Error performing exclusion: s1: %s s2: %s other: %s) rH r7 r5 rO rK rD r rp rb rE �AssertionError)rW rv �s1�s2r r r
�address_exclude� s< $
z _BaseNetwork.address_excludec C s` | j |j kr td| |f ��| j|jk r,dS | j|jkr<dS | j|jk rLdS | j|jkr\dS dS )a� Compare two IP objects.
This is only concerned about the comparison of the integer
representation of the network addresses. This means that the
host bits aren't considered at all in this method. If you want
to compare host bits, you can easily enough do a
'HostA._ip < HostB._ip'
Args:
other: An IP object.
Returns:
If the IP versions of self and other are the same, returns:
-1 if self < other:
eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25')
IPv6Network('2001:db8::1000/124') <
IPv6Network('2001:db8::2000/124')
0 if self == other
eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24')
IPv6Network('2001:db8::1000/124') ==
IPv6Network('2001:db8::1000/124')
1 if self > other
eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25')
IPv6Network('2001:db8::2000/124') >
IPv6Network('2001:db8::1000/124')
Raises:
TypeError if the IP versions are different.
z"%s and %s are not of the same typer& r rG rG )rH r7 rK r� )rW rv r r r
�compare_networks. s ! z _BaseNetwork.compare_networksc C s | j | j| jfS )z�Network-only key function.
Returns an object that identifies this address' network and
netmask. This function is a suitable "key" argument for sorted()
and list.sort().
)rH rK r� )rW r r r
rP ^ s z _BaseNetwork._get_networks_keyr& Nc c s� | j | jkr| V dS |dk rJ|| j k r0td��|dkr@td��|| j }|dk rZtd��| j | }|| jkr~td|| f ��t| j�}t| j�d }t| j�d |? }x(t|||�D ]}| j||f�}|V q�W dS )a� The subnets which join to make the current subnet.
In the case that self contains only one IP
(self._prefixlen == 32 for IPv4 or self._prefixlen == 128
for IPv6), yield an iterator with just ourself.
Args:
prefixlen_diff: An integer, the amount the prefix length
should be increased by. This should not be set if
new_prefix is also set.
new_prefix: The desired new prefix length. This must be a
larger number (smaller prefix) than the existing prefix.
This should not be set if prefixlen_diff is also set.
Returns:
An iterator of IPv(4|6) objects.
Raises:
ValueError: The prefixlen_diff is too small or too large.
OR
prefixlen_diff and new_prefix are both set or new_prefix
is a smaller number than the current prefix (smaller
number means a larger network)
Nznew prefix must be longerr& z(cannot set prefixlen_diff and new_prefixr z prefix length diff must be > 0z0prefix length diff %d is invalid for netblock %s) rI r9 r rk rK rD r� r� rp ) rW �prefixlen_diff�
new_prefix�
new_prefixlen�start�end�stepZnew_addrZcurrentr r r
rE h s,
z_BaseNetwork.subnetsc C s� | j dkr| S |dk rB|| j kr(td��|dkr8td��| j | }| j| }|dk rftd| j|f ��| jt| j�t| j�|> @ |f�S )a� The supernet containing the current network.
Args:
prefixlen_diff: An integer, the amount the prefix length of
the network should be decreased by. For example, given a
/24 network and a prefixlen_diff of 3, a supernet with a
/21 netmask is returned.
Returns:
An IPv4 network object.
Raises:
ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have
a negative prefix length.
OR
If prefixlen_diff and new_prefix are both set or new_prefix is a
larger number than the current prefix (larger number means a
smaller network)
r Nznew prefix must be shorterr& z(cannot set prefixlen_diff and new_prefixz;current prefixlen is %d, cannot have a prefixlen_diff of %d)rI r rb rp rk rK r� )rW r� r� r� r r r
r? � s
z_BaseNetwork.supernetc C s | j jo| jjS )z�Test if the address is reserved for multicast use.
Returns:
A boolean, True if the address is a multicast address.
See RFC 2373 2.7 for details.
)rK � is_multicastrD )rW r r r
r� � s z_BaseNetwork.is_multicastc C s | j jo| jjS )z�Test if the address is otherwise IETF reserved.
Returns:
A boolean, True if the address is within one of the
reserved IPv6 Network ranges.
)rK � is_reservedrD )rW r r r
r� � s z_BaseNetwork.is_reservedc C s | j jo| jjS )z�Test if the address is reserved for link-local.
Returns:
A boolean, True if the address is reserved per RFC 4291.
)rK �
is_link_localrD )rW r r r
r� � s z_BaseNetwork.is_link_localc C s | j jo| jjS )z�Test if this address is allocated for private networks.
Returns:
A boolean, True if the address is reserved per
iana-ipv4-special-registry or iana-ipv6-special-registry.
)rK �
is_privaterD )rW r r r
r� � s z_BaseNetwork.is_privatec C s | j S )z�Test if this address is allocated for public networks.
Returns:
A boolean, True if the address is not reserved per
iana-ipv4-special-registry or iana-ipv6-special-registry.
)r� )rW r r r
� is_global� s z_BaseNetwork.is_globalc C s | j jo| jjS )z�Test if the address is unspecified.
Returns:
A boolean, True if this is the unspecified address as defined in
RFC 2373 2.5.2.
)rK �is_unspecifiedrD )rW r r r
r� s z_BaseNetwork.is_unspecifiedc C s | j jo| jjS )z�Test if the address is a loopback address.
Returns:
A boolean, True if the address is a loopback address as defined in
RFC 2373 2.5.3.
)rK � is_loopbackrD )rW r r r
r� s z_BaseNetwork.is_loopback)r& N)r& N)$r r r r r� r{ r} r� r� r� rx rw r� r� r� rs rD r� r� r� r� r� r� rb r� r� rP rE r? r� r� r� r� r� r� r� r r r r
rO V s@
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5
) rO c
@ s� e Zd ZdZf ZdZde d Zed�Z edddd d
d d d
dh �Z
eZ i Z dd� Z
edd� �Zedd� �Zedd� �Zedd� �Zdd� Zdd � Zd d � Zed d � �Zed!d"� �Zd#S )$rh zyBase IPv4 object.
The following methods are used by IPv4 objects in both single IP
addresses and networks.
r r r& �
0123456789� � � � �� �� � r r c C s t | �S )N)r! )rW r r r
rV 0 s z$_BaseV4._explode_shorthand_ip_stringc C sn || j krdt|t�r|}n.y| j|�}W n tk
rF | j|�}Y nX t| j|��}||f| j |< | j | S )a Make a (netmask, prefix_len) tuple from the given argument.
Argument can be:
- an integer (the prefix length)
- a string representing the prefix length (e.g. "24")
- a string representing the prefix netmask (e.g. "255.255.255.0")
)�_netmask_cacher5 rk rl r ro r rc )ra �argrb r� r r r
�
_make_netmask3 s
z_BaseV4._make_netmaskc C s| |s t d��|jd�}t|�dkr.t d| ��ytjt| j|�d�S tk
rv } zt d||f �d�W Y dd}~X nX dS )a Turn the given IP string into an integer for comparison.
Args:
ip_str: A string, the IP ip_str.
Returns:
The IP ip_str as an integer.
Raises:
AddressValueError: if ip_str isn't a valid IPv4 Address.
zAddress cannot be empty�.r zExpected 4 octets in %rr z%s in %rN)r r" r# rk �
from_bytes�map� _parse_octetr )ra rn Zoctets�excr r r
rm K s
z_BaseV4._ip_int_from_stringc C s� |s t d��| jj|�s(d}t || ��t|�dkrDd}t || ��t|d�}|dkrr|d dkrrd }t || ��|d
kr�t d | ��|S ) a Convert a decimal octet into an integer.
Args:
octet_str: A string, the number to parse.
Returns:
The octet as an integer.
Raises:
ValueError: if the octet isn't strictly a decimal from [0..255].
zEmpty octet not permittedz#Only decimal digits permitted in %r� z$At most 3 characters permitted in %r�
� r �0z3Ambiguous (octal/decimal) value in %r not permittedr� z Octet %d (> 255) not permitted)r ri rj r# rk )ra Z octet_strr^ Z octet_intr r r
r� e s
z_BaseV4._parse_octetc C s dj tt|jdd���S )z�Turns a 32-bit integer into dotted decimal notation.
Args:
ip_int: An integer, the IP address.
Returns:
The IP address as a string in dotted decimal notation.
r� r r )�joinr� r! r )ra re r r r
r| � s z_BaseV4._string_from_ip_intc C s� |j d�}t|�dkr�y$x |D ]}t|�| jkr dS q W W n tk
rN dS X x0t|�D ]$\}}|dkrZ|||d krZdS qZW dS y t|�}W n tk
r� dS X d| ko�| jkS S )z�Verify that the netmask is valid.
Args:
netmask: A string, either a prefix or dotted decimal
netmask.
Returns:
A boolean, True if the prefix represents a valid IPv4
netmask.
r� r Fr r& T)r" r# rk �_valid_mask_octetsr � enumerater9 )rW r� �maskr� �idx�yr r r
�_is_valid_netmask� s"
z_BaseV4._is_valid_netmaskc sh |j d�}y � fdd�tt|�D �}W n tk
r: dS X t|�t|�krPdS |d |d k rddS dS ) z�Test if the IP string is a hostmask (rather than a netmask).
Args:
ip_str: A string, the potential hostmask.
Returns:
A boolean, True if the IP string is a hostmask.
r� c s g | ]}|� j kr|�qS r )r� )�.0r� )rW r r
�
<listcomp>� s z(_BaseV4._is_hostmask.<locals>.<listcomp>Fr r& TrG )r" r� rk r r# )rW rn r2 �partsr )rW r
� _is_hostmask� s
z_BaseV4._is_hostmaskc C s& t | �jd�ddd� }dj|�d S )z�Return the reverse DNS pointer name for the IPv4 address.
This implements the method described in RFC1035 3.5.
r� Nr& z
.in-addr.arparG )r! r" r� )rW Zreverse_octetsr r r
rZ � s z_BaseV4._reverse_pointerc C s | j S )N)r9 )rW r r r
�
max_prefixlen� s z_BaseV4.max_prefixlenc C s | j S )N)rH )rW r r r
r8 � s z_BaseV4.versionN)r r r r rr rH �
IPV4LENGTHr: � frozensetri r� r9 r� rV rt r� rm r� r| r� r� rZ rs r� r8 r r r r
rh s$ %
rh c @ s� e Zd ZdZdZdd� Zedd� �Zedd � �Zee j
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� d d
� ��Z edd� �Z
edd� �Zedd� �Zedd� �ZdS )r z/Represent and manipulate single IPv4 Addresses.r) � __weakref__c C sr t |t�r | j|� || _dS t |t�rF| j|d� tj|d�| _dS t|�}d|krbtd| ��| j |�| _dS )a�
Args:
address: A string or integer representing the IP
Additionally, an integer can be passed, so
IPv4Address('192.0.2.1') == IPv4Address(3221225985).
or, more generally
IPv4Address(int(IPv4Address('192.0.2.1'))) ==
IPv4Address('192.0.2.1')
Raises:
AddressValueError: If ipaddress isn't a valid IPv4 address.
Nr r r zUnexpected '/' in %r)
r5 rk r_ r) �bytesr` r� r! r rm )rW r �addr_strr r r
r� � s
zIPv4Address.__init__c C s
t | j�S )z*The binary representation of this address.)r r) )rW r r r
�packed s zIPv4Address.packedc C s | | j jkS )z�Test if the address is otherwise IETF reserved.
Returns:
A boolean, True if the address is within the
reserved IPv4 Network range.
)�
_constants�_reserved_network)rW r r r
r� s zIPv4Address.is_reservedc s4 t � fdd�� jjD ��o2t� fdd�� jjD ��S )a� ``True`` if the address is defined as not globally reachable by
iana-ipv4-special-registry_ (for IPv4) or iana-ipv6-special-registry_
(for IPv6) with the following exceptions:
* ``is_private`` is ``False`` for ``100.64.0.0/10``
* For IPv4-mapped IPv6-addresses the ``is_private`` value is determined by the
semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_private == address.ipv4_mapped.is_private
``is_private`` has value opposite to :attr:`is_global`, except for the ``100.64.0.0/10``
IPv4 range where they are both ``False``.
c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
� <genexpr>( s z)IPv4Address.is_private.<locals>.<genexpr>c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
r� ) s )�anyr� �_private_networks�all� _private_networks_exceptions)rW r )rW r
r� s zIPv4Address.is_privatec C s | | j jko| j S )ar ``True`` if the address is defined as globally reachable by
iana-ipv4-special-registry_ (for IPv4) or iana-ipv6-special-registry_
(for IPv6) with the following exception:
For IPv4-mapped IPv6-addresses the ``is_private`` value is determined by the
semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_global == address.ipv4_mapped.is_global
``is_global`` has value opposite to :attr:`is_private`, except for the ``100.64.0.0/10``
IPv4 range where they are both ``False``.
)r� �_public_networkr� )rW r r r
r� , s zIPv4Address.is_globalc C s | | j jkS )z�Test if the address is reserved for multicast use.
Returns:
A boolean, True if the address is multicast.
See RFC 3171 for details.
)r� �_multicast_network)rW r r r
r� > s zIPv4Address.is_multicastc C s | | j jkS )z�Test if the address is unspecified.
Returns:
A boolean, True if this is the unspecified address as defined in
RFC 5735 3.
)r� �_unspecified_address)rW r r r
r� I s zIPv4Address.is_unspecifiedc C s | | j jkS )z�Test if the address is a loopback address.
Returns:
A boolean, True if the address is a loopback per RFC 3330.
)r� �_loopback_network)rW r r r
r� T s zIPv4Address.is_loopbackc C s | | j jkS )z�Test if the address is reserved for link-local.
Returns:
A boolean, True if the address is link-local per RFC 3927.
)r� �_linklocal_network)rW r r r
r� ^ s zIPv4Address.is_link_localN)r) r� )r r r r rr r� rs r� r� � functools� lru_cacher� r� r� r� r� r� r r r r
r � s #
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�r�tj| |d � t |�dkrht|d �| _ n| j| _ t|dd�| _| jj | _ | jj
| _
d S t|�}tj| |d � t|dd�| _| jj | _ | jj | _ | jj
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d S )Nr r& F)r )r5 r� rk r r� r r) r� r9 rI �tupler# r� r� r% )rW r r$ r r r
r� k s(
zIPv4Interface.__init__c C s d| j | j�| jjf S )Nz%s/%d)r| r) r� rb )rW r r r
r} � s zIPv4Interface.__str__c C sD t j| |�}| s|tkr |S y | j|jkS tk
r> dS X d S )NF)r rw rR r� rJ )rW rv �
address_equalr r r
rw � s zIPv4Interface.__eq__c C sN t j| |�}|tkrtS y | j|jk p4| j|jko4|S tk
rH dS X d S )NF)r rx rR r� rJ )rW rv � address_lessr r r
rx � s zIPv4Interface.__lt__c C s t | j| jt| jj�f�S )N)r~ r) rI rk r� rK )rW r r r
r� � s zIPv4Interface.__hash__c C s
t | j�S )N)r r) )rW r r r
r. � s zIPv4Interface.ipc C s d| j | j�| jf S )Nz%s/%s)r| r) rI )rW r r r
r� � s z IPv4Interface.with_prefixlenc C s d| j | j�| jf S )Nz%s/%s)r| r) r� )rW r r r
r� � s zIPv4Interface.with_netmaskc C s d| j | j�| jf S )Nz%s/%s)r| r) r� )rW r r r
r� � s zIPv4Interface.with_hostmaskN)r r r r� r} rw rx r� rU rq rs r. r� r� r� r r r r
r i s r c @ s2 e Zd ZdZeZddd�Zeej � dd� ��Z
dS ) r ae This class represents and manipulates 32-bit IPv4 network + addresses..
Attributes: [examples for IPv4Network('192.0.2.0/27')]
.network_address: IPv4Address('192.0.2.0')
.hostmask: IPv4Address('0.0.0.31')
.broadcast_address: IPv4Address('192.0.2.32')
.netmask: IPv4Address('255.255.255.224')
.prefixlen: 27
Tc C s� t j| |� t|ttf�r&|}| j}n^t|t�rT|d }t|�dkrL|d n| j}n0t|�}| j |d �}t|�dkr~|d n| j}t
|�| _ | j |�\| _
| _t| j �}|t| j
�@ |kr�|r�td| ��nt
|t| j
�@ �| _ | j| jd kr�| j| _dS )a Instantiate a new IPv4 network object.
Args:
address: A string or integer representing the IP [& network].
'192.0.2.0/24'
'192.0.2.0/255.255.255.0'
'192.0.0.2/0.0.0.255'
are all functionally the same in IPv4. Similarly,
'192.0.2.1'
'192.0.2.1/255.255.255.255'
'192.0.2.1/32'
are also functionally equivalent. That is to say, failing to
provide a subnetmask will create an object with a mask of /32.
If the mask (portion after the / in the argument) is given in
dotted quad form, it is treated as a netmask if it starts with a
non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it
starts with a zero field (e.g. 0.255.255.255 == /8), with the
single exception of an all-zero mask which is treated as a
netmask == /0. If no mask is given, a default of /32 is used.
Additionally, an integer can be passed, so
IPv4Network('192.0.2.1') == IPv4Network(3221225985)
or, more generally
IPv4Interface(int(IPv4Interface('192.0.2.1'))) ==
IPv4Interface('192.0.2.1')
Raises:
AddressValueError: If ipaddress isn't a valid IPv4 address.
NetmaskValueError: If the netmask isn't valid for
an IPv4 address.
ValueError: If strict is True and a network address is not
supplied.
r r& r z%s has host bits setN)rO r� r5 rk r� r9 r� r# r% rm r rK r� r� rI r r� r� )rW r r r$ r� �argsr� r r r
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zIPv4Network.__init__c C s& | j td�ko| jtd�k o$| j S )z�Test if this address is allocated for public networks.
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172.16.0.0/12z 192.0.0.0/24z192.0.0.170/31z 192.0.2.0/24z192.168.0.0/16z
198.18.0.0/15z198.51.100.0/24z203.0.113.0/24z 240.0.0.0/4z255.255.255.255/32z 192.0.0.9/32z
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zAddress cannot be empty�:r� z At least %d parts expected in %rr� r& z%s in %rNz%xr i�� z!At most %d colons permitted in %rz At most one '::' permitted in %rr z0Leading ':' only permitted as part of '::' in %rz1Trailing ':' only permitted as part of '::' in %rz/Expected at most %d other parts with '::' in %rz,Exactly %d parts expected without '::' in %rrG rG rG ) r r" r# r r> r) rA �
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z_BaseV6._ip_int_from_stringc C s> | j j|�std| ��t|�dkr4d}t|| ��t|d�S )a& Convert an IPv6 hextet string into an integer.
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hextet_strr^ r r r
r� � s z_BaseV6._parse_hextetc C s� d}d}d}d}xJt |�D ]>\}}|dkrP|d7 }|dkr>|}||krX|}|}qd}d}qW |dkr�|| }|t|�kr�|dg7 }dg|||�< |dkr�dg| }|S ) a� Compresses a list of hextets.
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r& r r� � rG rG rG rG )r� r# ) ra �hextetsZbest_doublecolon_startZbest_doublecolon_lenZdoublecolon_startZdoublecolon_len�indexZhextetZbest_doublecolon_endr r r
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z_BaseV6._compress_hextetsNc sZ |dkrt | j�}|| jkr$td��d| � � fdd�tddd�D �}| j|�}d j|�S )
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z$_BaseV6._explode_shorthand_ip_stringc C s& | j ddd� jdd�}dj|�d S )z�Return the reverse DNS pointer name for the IPv6 address.
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z/Represent and manipulate single IPv6 Addresses.r) r� c C sr t |t�r | j|� || _dS t |t�rF| j|d� tj|d�| _dS t|�}d|krbtd| ��| j |�| _dS )a Instantiate a new IPv6 address object.
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IPv6Address('2001:db8::') ==
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or, more generally
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r� � s zIPv6Address.packedc C s | | j jkS )z�Test if the address is reserved for multicast use.
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r� � s zIPv6Address.is_reservedc C s | | j jkS )z�Test if the address is reserved for link-local.
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r� � s zIPv6Address.is_link_localc C s | | j jkS )a` Test if the address is reserved for site-local.
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addresses as defined by RFC 4193.
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)r� �_sitelocal_network)rW r r r
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is_site_local� s zIPv6Address.is_site_localc sH � j }|dk r|jS t� fdd�� jjD ��oFt� fdd�� jjD ��S )a� ``True`` if the address is defined as not globally reachable by
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* ``is_private`` is ``False`` for ``100.64.0.0/10``
* For IPv4-mapped IPv6-addresses the ``is_private`` value is determined by the
semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_private == address.ipv4_mapped.is_private
``is_private`` has value opposite to :attr:`is_global`, except for the ``100.64.0.0/10``
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r� � s z)IPv6Address.is_private.<locals>.<genexpr>c 3 s | ]}� |kV qd S )Nr )r� r; )rW r r
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(for IPv6) with the following exception:
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semantics of the underlying IPv4 addresses and the following condition holds
(see :attr:`IPv6Address.ipv4_mapped`)::
address.is_global == address.ipv4_mapped.is_global
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)r� )rW r r r
r� � s zIPv6Address.is_globalc C s
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r� � s zIPv6Address.is_loopbackc C s | j d? dkrdS t| j d@ �S )z�Return the IPv4 mapped address.
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r� � s zIPv6Address.ipv4_mappedc C s4 | j d? dkrdS t| j d? d@ �t| j d@ �fS )z�Tuple of embedded teredo IPs.
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dd�Zdd� Zedd� �Z d S ) r av This class represents and manipulates 128-bit IPv6 networks.
Attributes: [examples for IPv6('2001:db8::1000/124')]
.network_address: IPv6Address('2001:db8::1000')
.hostmask: IPv6Address('::f')
.broadcast_address: IPv6Address('2001:db8::100f')
.netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0')
.prefixlen: 124
Tc C s� t j| |� t|ttf�r&|}| j}n^t|t�rT|d }t|�dkrL|d n| j}n0t|�}| j |d �}t|�dkr~|d n| j}t
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'2001:db8::/128'
'2001:db8:0000:0000:0000:0000:0000:0000/128'
'2001:db8::'
are all functionally the same in IPv6. That is to say,
failing to provide a subnetmask will create an object with
a mask of /128.
Additionally, an integer can be passed, so
IPv6Network('2001:db8::') ==
IPv6Network(42540766411282592856903984951653826560)
or, more generally
IPv6Network(int(IPv6Network('2001:db8::'))) ==
IPv6Network('2001:db8::')
strict: A boolean. If true, ensure that we have been passed
A true network address, eg, 2001:db8::1000/124 and not an
IP address on a network, eg, 2001:db8::1/124.
Raises:
AddressValueError: If address isn't a valid IPv6 address.
NetmaskValueError: If the netmask isn't valid for
an IPv6 address.
ValueError: If strict was True and a network address was not
supplied.
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zIPv6Network.hostsc C s | j jo| jjS )a` Test if the address is reserved for site-local.
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::ffff:0:0/96z64:ff9b:1::/48z100::/64z 2001::/23z
2001:db8::/32z 2002::/16zfc00::/7z
2001:1::1/128z
2001:1::2/128z 2001:3::/32z2001:4:112::/48z 2001:20::/28z 2001:30::/28z::/8z100::/8z200::/7z400::/6z800::/5z1000::/4z4000::/3z6000::/3z8000::/3zA000::/3zC000::/3zE000::/4zF000::/5zF800::/6zFE00::/9z fec0::/10N)
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Authentication) and RFC 2487 (Secure SMTP over TLS).
Notes:
Please remember, when doing ESMTP, that the names of the SMTP service
extensions are NOT the same thing as the option keywords for the RCPT
and MAIL commands!
Example:
>>> import smtplib
>>> s=smtplib.SMTP("localhost")
>>> print(s.help())
This is Sendmail version 8.8.4
Topics:
HELO EHLO MAIL RCPT DATA
RSET NOOP QUIT HELP VRFY
EXPN VERB ETRN DSN
For more info use "HELP <topic>".
To report bugs in the implementation send email to
sendmail-bugs@sendmail.org.
For local information send email to Postmaster at your site.
End of HELP info
>>> s.putcmd("vrfy","someone@here")
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>>> s.quit()
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These exceptions are generated in some instances when the SMTP
server returns an error code. The error code is stored in the
`smtp_code' attribute of the error, and the `smtp_error' attribute
is set to the error message.
c C s || _ || _||f| _d S )N)� smtp_code�
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c C s" || _ || _|| _|||f| _d S )N)r r �senderr )r r r r r r r r n s zSMTPSenderRefused.__init__N)r r r r r r r r r r g s c @ s e Zd ZdZdd� ZdS )r z�All recipient addresses refused.
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recipientsr )r r r r r r | s z SMTPRecipientsRefused.__init__N)r r r r r r r r r r t s c @ s e Zd ZdZdS )r z'The SMTP server didn't accept the data.N)r r r r r r r r r � s c @ s e Zd ZdZdS )r z&Error during connection establishment.N)r r r r r r r r r � s c @ s e Zd ZdZdS )r
z"The server refused our HELO reply.N)r r r r r r r r r
� s c @ s e Zd ZdZdS )r zvAuthentication error.
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� s c C s t jdd| �S )Ns (?m)^\.s ..)r+ r, )Zbindatar r r �_quote_periods� s r/ c C s t jdt| �S )Nz(?:\r\n|\n|\r(?!\n)))r+ r, r- )r. r r r � _fix_eols� s r0 FTc @ s� e Zd ZdZdZdZdZdZdZdZ e
Z ddde j
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� Zdd� Zdd� ZdMdd�Zdd� ZdNdd�Zdd� ZdOdd �ZdPd d �ZdQd d �Zd!d"� ZdRd#d$�Z d%d&� Z d'd(� Z d)d*� Z f fd+d,�Z f fd-d.�Z!d/d0� Z"d1d2� Z#e#Z$d3d4� Z%d5d6� Z&d7d8�d9d:�Z'dSd;d<�Z(dTd=d>�Z)dUd?d@�Z*d7d8�dAdB�Z+dVdCdD�Z,f f fdEdF�Z-ddf f fdGdH�Z.dIdJ� Z/dKdL� Z0dS )Wr a� This class manages a connection to an SMTP or ESMTP server.
SMTP Objects:
SMTP objects have the following attributes:
helo_resp
This is the message given by the server in response to the
most recent HELO command.
ehlo_resp
This is the message given by the server in response to the
most recent EHLO command. This is usually multiline.
does_esmtp
This is a True value _after you do an EHLO command_, if the
server supports ESMTP.
esmtp_features
This is a dictionary, which, if the server supports ESMTP,
will _after you do an EHLO command_, contain the names of the
SMTP service extensions this server supports, and their
parameters (if any).
Note, all extension names are mapped to lower case in the
dictionary.
See each method's docstrings for details. In general, there is a
method of the same name to perform each SMTP command. There is also a
method called 'sendmail' that will do an entire mail transaction.
r N�ehlor c
C s� || _ || _i | _d| _|| _|rL| j||�\}}|dkrL| j� t||��|dk r\|| _nPt j
� }d|krt|| _n8d} yt j t j � �} W n t j
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r� Y nX d| | _dS )a Initialize a new instance.
If specified, `host' is the name of the remote host to which to
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By default, smtplib.SMTP_PORT is used. If a host is specified the
connect method is called, and if it returns anything other than a
success code an SMTPConnectError is raised. If specified,
`local_hostname` is used as the FQDN of the local host in the HELO/EHLO
command. Otherwise, the local hostname is found using
socket.getfqdn(). The `source_address` parameter takes a 2-tuple (host,
port) for the socket to bind to as its source address before
connecting. If the host is '' and port is 0, the OS default behavior
will be used.
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|| _ dS )z�Set the debug output level.
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|| _ | r~|jd�|jd�kr~|jd�}|dkr~|d|� ||d d� }}y t|�}W n tk
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�| _ d| _ | j
� \}}| jdkr�| jdt|�� ||fS )ap Connect to a host on a given port.
If the hostname ends with a colon (`:') followed by a number, and
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Note: This method is automatically invoked by __init__, if a host is
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z SMTP.connectc C s� | j dkr| jdt|�� t| d�rx| jrxt|t�r@|j| j�}y| jj |� W q� t
k
rt | j � t d��Y q�X nt d��dS )zSend `s' to the server.r zsend:rX zServer not connectedzplease run connect() firstN)
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isinstance�str�encoder8 ZsendallrV r; r )r �sr r r �sendW s
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rn } z | j� tdt|� ��W Y dd}~X nX |s�| j� td��| j dkr�| j
dt |�� t |�tkr�| j� t
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�r d}P Y nX |d d
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d||f � ||fS )a� Get a reply from the server.
Returns a tuple consisting of:
- server response code (e.g. '250', or such, if all goes well)
Note: returns -1 if it can't read response code.
- server response string corresponding to response code (multiline
responses are converted to a single, multiline string).
Raises SMTPServerDisconnected if end-of-file is reached.
N�rbrG z Connection unexpectedly closed: z Connection unexpectedly closedr zreply:i� zLine too long.� s
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z
SMTP.getreplyc C s | j ||� | j� S )z-Send a command, and return its response code.)rc rY )r rb r r r r rB � s z
SMTP.docmdc C s, | j d|p| j� | j� \}}|| _||fS )zwSMTP 'helo' command.
Hostname to send for this command defaults to the FQDN of the local
host.
�helo)rc r< rY � helo_resp)r �namer r r r r rt � s z SMTP.heloc
C s2 i | _ | j| j|p| j� | j� \}}|d
krJt|�dkrJ| j� td��|| _|dkr`||fS d| _ | jj
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|�}|r�| j jdd�d |jd�d | j d< q�tj
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|�}|r�|jd �j� }|j|jd �d � j� } |dk�r | j j|d�d | | j |< q�| | j |< q�W ||fS )zx SMTP 'ehlo' command.
Hostname to send for this command defaults to the FQDN of the local
host.
rG r zServer not connected� zlatin-1�
�authr � z((?P<feature>[A-Za-z0-9][A-Za-z0-9\-]*) ?�featureNri )r7 rc �ehlo_msgr< rY rm r; r � ehlo_resp�
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SMTP.has_extnc C s | j d|� | j� d S )z;SMTP 'help' command.
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r Y nX dS )a Internal 'rset' command which ignores any SMTPServerDisconnected error.
Used internally in the library, since the server disconnected error
should appear to the application when the *next* command is issued, if
we are doing an internal "safety" reset.
N)r� r )r r r r �_rset� s z
SMTP._rsetc C s
| j d�S )z-SMTP 'noop' command -- doesn't do anything :>�noop)rB )r r r r r� s z SMTP.noopc C sh d}|rH| j rHtdd� |D ��r:| jd�r2d| _ntd��ddj|� }| jdd t|�|f � | j� S )
a8 SMTP 'mail' command -- begins mail xfer session.
This method may raise the following exceptions:
SMTPNotSupportedError The options parameter includes 'SMTPUTF8'
but the SMTPUTF8 extension is not supported by
the server.
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z SMTP.mailc C s< d}|r | j r ddj|� }| jddt|�|f � | j� S )z;SMTP 'rcpt' command -- indicates 1 recipient for this mail.r rz �rcptzTO:%s%s)r~ ro rc r rY )r Zrecipr� r� r r r r� s
z SMTP.rcptc C s� | j d� | j� \}}| jdkr0| jd||f� |dkrDt||��n|t|t�r\t|�jd�}t |�}|d d� t
kr||t
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}| j |� | j� \}}| jdkr�| jd||f� ||fS dS )
a� SMTP 'DATA' command -- sends message data to server.
Automatically quotes lines beginning with a period per rfc821.
Raises SMTPDataError if there is an unexpected reply to the
DATA command; the return value from this method is the final
response code received when the all data is sent. If msg
is a string, lone '\r' and '\n' characters are converted to
'\r\n' characters. If msg is bytes, it is transmitted as is.
r. r zdata:ib r2 � N� .���) rc rY rE rM r r] r^ r0 r_ r/ �bCRLFra )r r r �repl�qr r r r. ! s"
z SMTP.datac C s | j dt|�� | j� S )z5SMTP 'verify' command -- checks for address validity.�vrfy)rc r* rY )r �addressr r r �verify> s z SMTP.verifyc C s | j dt|�� | j� S )z.SMTP 'expn' command -- expands a mailing list.�expn)rc r* rY )r r� r r r r� E s z SMTP.expnc C sf | j dkrb| jdkrbd| j� d ko.dkn sb| j� \}}d| koRdkn sbt||��dS )ab Call self.ehlo() and/or self.helo() if needed.
If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
N�� r i+ )ru r} r1 rt r
)r r rp r r r �ehlo_or_helo_if_neededL s
zSMTP.ehlo_or_helo_if_neededT)�initial_response_okc C s� |j � }|r|� nd}|dk rJt|jd�dd�}| jd|d | �\}}n| jd|�\}}|dkr�tj|�}t||�jd�dd�}| j|�\}}|d
kr�||fS t||��dS ) a� Authentication command - requires response processing.
'mechanism' specifies which authentication mechanism is to
be used - the valid values are those listed in the 'auth'
element of 'esmtp_features'.
'authobject' must be a callable object taking a single argument:
data = authobject(challenge)
It will be called to process the server's challenge response; the
challenge argument it is passed will be a bytes. It should return
an ASCII string that will be base64 encoded and sent to the server.
Keyword arguments:
- initial_response_ok: Allow sending the RFC 4954 initial-response
to the AUTH command, if the authentication methods supports it.
Nr2 r )ZeolZAUTHrz iN �� � )r� r� )�upper�
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authobjectr� Zinitial_responseZresponser rp � challenger r r ry ] s
z SMTP.authc C s0 |dkr dS | j d tj| jjd�|d�j� S )zh Authobject to use with CRAM-MD5 authentication. Requires self.user
and self.password to be set.Nrz r2 Zmd5)�user�hmacZHMAC�passwordr_ Z hexdigest)r r� r r r �
auth_cram_md5� s zSMTP.auth_cram_md5c C s d| j | jf S )ze Authobject to use with PLAIN authentication. Requires self.user and
self.password to be set.z %s %s)r� r� )r r� r r r �
auth_plain� s zSMTP.auth_plainc C s |dkr| j S | jS dS )ze Authobject to use with LOGIN authentication. Requires self.user and
self.password to be set.N)r� r� )r r� r r r �
auth_login� s zSMTP.auth_loginc s� | j � | jd�std��| jd j� � dddg}� fdd�|D �}|sPtd��|| | _| _xv|D ]n}d |j� j d
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X qdX qdW | �dS )aw Log in on an SMTP server that requires authentication.
The arguments are:
- user: The user name to authenticate with.
- password: The password for the authentication.
Keyword arguments:
- initial_response_ok: Allow sending the RFC 4954 initial-response
to the AUTH command, if the authentication methods supports it.
If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first.
This method will return normally if the authentication was successful.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
SMTPAuthenticationError The server didn't accept the username/
password combination.
SMTPNotSupportedError The AUTH command is not supported by the
server.
SMTPException No suitable authentication method was
found.
ry z,SMTP AUTH extension not supported by server.zCRAM-MD5ZPLAINZLOGINc s g | ]}|� kr|�qS r r )r� ry )�advertised_authlistr r �
<listcomp>� s z SMTP.login.<locals>.<listcomp>z(No suitable authentication method found.Zauth_�-�_)r� r� � N)r� r� )
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SMTP.loginc C s� | j � | jd�std��| jd�\}}|dkr�ts<td��|dk rT|dk rTtd��|dk rl|dk rltd��|dk s||dk r�d dl}|jd
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t||��||fS )a� Puts the connection to the SMTP server into TLS mode.
If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first.
If the server supports TLS, this will encrypt the rest of the SMTP
session. If you provide the keyfile and certfile parameters,
the identity of the SMTP server and client can be checked. This,
however, depends on whether the socket module really checks the
certificates.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
�starttlsz+STARTTLS extension not supported by server.ZSTARTTLSr3 z&No SSL support included in this PythonNz4context and keyfile arguments are mutually exclusivez5context and certfile arguments are mutually exclusiver zAkeyfile and certfile are deprecated, use a custom context insteadr� )�certfile�keyfile)�server_hostname)r� r� r rB � _have_ssl� RuntimeErrorrU �warnings�warn�DeprecationWarning�ssl�_create_stdlib_context� wrap_socketrX r5 rH ru r} r7 r~ r )r r� r� �contextrp Zreplyr� r r r r� � s8
z
SMTP.starttlsc C sf | j � g }t|t�r$t|�jd�}| jr^| jd�rF|jdt|� � x|D ]}|j|� qLW | j ||�\}} |dkr�|dkr�| j
� n| j � t || |��i }
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S )a| This command performs an entire mail transaction.
The arguments are:
- from_addr : The address sending this mail.
- to_addrs : A list of addresses to send this mail to. A bare
string will be treated as a list with 1 address.
- msg : The message to send.
- mail_options : List of ESMTP options (such as 8bitmime) for the
mail command.
- rcpt_options : List of ESMTP options (such as DSN commands) for
all the rcpt commands.
msg may be a string containing characters in the ASCII range, or a byte
string. A string is encoded to bytes using the ascii codec, and lone
\r and \n characters are converted to \r\n characters.
If there has been no previous EHLO or HELO command this session, this
method tries ESMTP EHLO first. If the server does ESMTP, message size
and each of the specified options will be passed to it. If EHLO
fails, HELO will be tried and ESMTP options suppressed.
This method will return normally if the mail is accepted for at least
one recipient. It returns a dictionary, with one entry for each
recipient that was refused. Each entry contains a tuple of the SMTP
error code and the accompanying error message sent by the server.
This method may raise the following exceptions:
SMTPHeloError The server didn't reply properly to
the helo greeting.
SMTPRecipientsRefused The server rejected ALL recipients
(no mail was sent).
SMTPSenderRefused The server didn't accept the from_addr.
SMTPDataError The server replied with an unexpected
error code (other than a refusal of
a recipient).
SMTPNotSupportedError The mail_options parameter includes 'SMTPUTF8'
but the SMTPUTF8 extension is not supported by
the server.
Note: the connection will be open even after an exception is raised.
Example:
>>> import smtplib
>>> s=smtplib.SMTP("localhost")
>>> tolist=["one@one.org","two@two.org","three@three.org","four@four.org"]
>>> msg = '''\
... From: Me@my.org
... Subject: testin'...
...
... This is a test '''
>>> s.sendmail("me@my.org",tolist,msg)
{ "three@three.org" : ( 550 ,"User unknown" ) }
>>> s.quit()
In the above example, the message was accepted for delivery to three
of the four addresses, and one was rejected, with the error code
550. If all addresses are accepted, then the method will return an
empty dictionary.
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||�S ) a~ Converts message to a bytestring and passes it to sendmail.
The arguments are as for sendmail, except that msg is an
email.message.Message object. If from_addr is None or to_addrs is
None, these arguments are taken from the headers of the Message as
described in RFC 2822 (a ValueError is raised if there is more than
one set of 'Resent-' headers). Regardless of the values of from_addr and
to_addr, any Bcc field (or Resent-Bcc field, when the Message is a
resent) of the Message object won't be transmitted. The Message
object is then serialized using email.generator.BytesGenerator and
sendmail is called to transmit the message. If the sender or any of
the recipient addresses contain non-ASCII and the server advertises the
SMTPUTF8 capability, the policy is cloned with utf8 set to True for the
serialization, and SMTPUTF8 and BODY=8BITMIME are asserted on the send.
If the server does not support SMTPUTF8, an SMTPNotSupported error is
raised. Otherwise the generator is called without modifying the
policy.
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as they do in the SMTP class. keyfile and certfile are also optional -
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configparser.cpython-36.pyc 0000644 00000130276 15033571514 0011671 0 ustar 00 3
\X� � @ s� d Z ddlmZ ddlmZmZ ddlZddl Z ddl
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A configuration file consists of sections, lead by a "[section]" header,
and followed by "name: value" entries, with continuations and such in
the style of RFC 822.
Intrinsic defaults can be specified by passing them into the
ConfigParser constructor as a dictionary.
class:
ConfigParser -- responsible for parsing a list of
configuration files, and managing the parsed database.
methods:
__init__(defaults=None, dict_type=_default_dict, allow_no_value=False,
delimiters=('=', ':'), comment_prefixes=('#', ';'),
inline_comment_prefixes=None, strict=True,
empty_lines_in_values=True, default_section='DEFAULT',
interpolation=<unset>, converters=<unset>):
Create the parser. When `defaults' is given, it is initialized into the
dictionary or intrinsic defaults. The keys must be strings, the values
must be appropriate for %()s string interpolation.
When `dict_type' is given, it will be used to create the dictionary
objects for the list of sections, for the options within a section, and
for the default values.
When `delimiters' is given, it will be used as the set of substrings
that divide keys from values.
When `comment_prefixes' is given, it will be used as the set of
substrings that prefix comments in empty lines. Comments can be
indented.
When `inline_comment_prefixes' is given, it will be used as the set of
substrings that prefix comments in non-empty lines.
When `strict` is True, the parser won't allow for any section or option
duplicates while reading from a single source (file, string or
dictionary). Default is True.
When `empty_lines_in_values' is False (default: True), each empty line
marks the end of an option. Otherwise, internal empty lines of
a multiline option are kept as part of the value.
When `allow_no_value' is True (default: False), options without
values are accepted; the value presented for these is None.
When `default_section' is given, the name of the special section is
named accordingly. By default it is called ``"DEFAULT"`` but this can
be customized to point to any other valid section name. Its current
value can be retrieved using the ``parser_instance.default_section``
attribute and may be modified at runtime.
When `interpolation` is given, it should be an Interpolation subclass
instance. It will be used as the handler for option value
pre-processing when using getters. RawConfigParser object s don't do
any sort of interpolation, whereas ConfigParser uses an instance of
BasicInterpolation. The library also provides a ``zc.buildbot``
inspired ExtendedInterpolation implementation.
When `converters` is given, it should be a dictionary where each key
represents the name of a type converter and each value is a callable
implementing the conversion from string to the desired datatype. Every
converter gets its corresponding get*() method on the parser object and
section proxies.
sections()
Return all the configuration section names, sans DEFAULT.
has_section(section)
Return whether the given section exists.
has_option(section, option)
Return whether the given option exists in the given section.
options(section)
Return list of configuration options for the named section.
read(filenames, encoding=None)
Read and parse the iterable of named configuration files, given by
name. A single filename is also allowed. Non-existing files
are ignored. Return list of successfully read files.
read_file(f, filename=None)
Read and parse one configuration file, given as a file object.
The filename defaults to f.name; it is only used in error
messages (if f has no `name' attribute, the string `<???>' is used).
read_string(string)
Read configuration from a given string.
read_dict(dictionary)
Read configuration from a dictionary. Keys are section names,
values are dictionaries with keys and values that should be present
in the section. If the used dictionary type preserves order, sections
and their keys will be added in order. Values are automatically
converted to strings.
get(section, option, raw=False, vars=None, fallback=_UNSET)
Return a string value for the named option. All % interpolations are
expanded in the return values, based on the defaults passed into the
constructor and the DEFAULT section. Additional substitutions may be
provided using the `vars' argument, which must be a dictionary whose
contents override any pre-existing defaults. If `option' is a key in
`vars', the value from `vars' is used.
getint(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to an integer.
getfloat(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to a float.
getboolean(section, options, raw=False, vars=None, fallback=_UNSET)
Like get(), but convert value to a boolean (currently case
insensitively defined as 0, false, no, off for False, and 1, true,
yes, on for True). Returns False or True.
items(section=_UNSET, raw=False, vars=None)
If section is given, return a list of tuples with (name, value) for
each option in the section. Otherwise, return a list of tuples with
(section_name, section_proxy) for each section, including DEFAULTSECT.
remove_section(section)
Remove the given file section and all its options.
remove_option(section, option)
Remove the given option from the given section.
set(section, option, value)
Set the given option.
write(fp, space_around_delimiters=True)
Write the configuration state in .ini format. If
`space_around_delimiters' is True (the default), delimiters
between keys and values are surrounded by spaces.
� )�MutableMapping)� OrderedDict�ChainMapN�NoSectionError�DuplicateOptionError�DuplicateSectionError�
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| _| jt k�r*| j | _| jd k�r>t � | _| t k �rT| jj | � d S )Nr| rh �|c s s | ]}t j|�V qd S )N)rd �escape)�.0�dr" r" r# � <genexpr>l s z+RawConfigParser.__init__.<locals>.<genexpr>)rv )r| rh ) �_dict� _sections� _defaultsr � _converters�_proxiesr rl rW �tuple� _delimiters� OPTCRE_NV�OPTCRE�_optcrer1 rd re � _OPT_NV_TMPLr. �VERBOSE� _OPT_TMPL�_comment_prefixes�_inline_comment_prefixes�_strict�_allow_no_value�_empty_lines_in_valuesr� �_interpolation�_UNSET�_DEFAULT_INTERPOLATIONr �update)r rD Z dict_typeZallow_no_valuer r� r� r� r� r� r� r� �keyr? r� r" r" r# r X s>
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rV | jrR||krR� Y nX |j|� xl|j� D ]`\}}| jt|��}|dk r�t|�}| jr�||f|kr�t |||��|j||f� | j |||� qlW qW dS )a Read configuration from a dictionary.
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zRawConfigParser.read_dictc C s" t jdtdd� | j||d� dS )z"Deprecated, use read_file instead.zRThis method will be removed in future versions. Use 'parser.read_file()' instead.r: )r; )r2 N)r< r= r> r� )r r� r9 r" r" r# �readfp� s
zRawConfigParser.readfp)rR rr rS c C s� y| j ||�}W n$ tk
r4 |tkr,� n|S Y nX | j|�}y || }W n, tk
rx |tkrpt||��n|S Y nX |s�|dkr�|S | jj| ||||�S dS )a] Get an option value for a given section.
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s� �t krt� j� S �jj� � y� j�j� � W n& tk
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zMaildir.__init__c C s~ | j � }y| j||� W n* tk
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z Maildir.addc C s t jt jj| j| j|��� dS )z=Remove the keyed message; raise KeyError if it doesn't exist.N)r r$ r r r �_lookup)r r# r r r r$ K s zMaildir.removec C s, y| j |� W n ttfk
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add_folder� s zMaildir.add_folderc C s, t jj| jd| �}xTt jt jj|d��t jt jj|d�� D ](}t|�dk sZ|d dkr>td| ��q>W xPt j|�D ]B}|dkrv|dkrv|dkrvt jjt jj||��rvtd||f ��qvW x`t j|d d
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zMaildir._refreshc C sz y,t jjt jj| j| j| ��r*| j| S W n tk
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z_singlefileMailbox.addc C s | j |� | j|= d| _dS )z=Remove the keyed message; raise KeyError if it doesn't exist.TN)r� r� r� )r r# r r r r$ b s
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z _singlefileMailbox.__setitem__c c s | j � | jj� E dH dS )z Return an iterator over keys.N)r� r� r8 )r r r r r6 n s z_singlefileMailbox.iterkeysc C s | j � || jkS )z9Return True if the keyed message exists, False otherwise.)r� r� )r r# r r r r? s s z _singlefileMailbox.__contains__c C s | j � t| j�S )z*Return a count of messages in the mailbox.)r� r� r� )r r r r r@ x s z_singlefileMailbox.__len__c C s | j st| j� d| _ dS )zLock the mailbox.TN)r� �
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zMH.lockc C s( | j r$t| j� t| j� | `d| _ dS )z#Unlock the mailbox if it is locked.FN)r� r� r� r� )r r r r rK H s
z MH.unlockc C s dS )z&Write any pending changes to the disk.Nr )r r r r rI P s zMH.flushc C s | j r| j� dS )z Flush and close the mailbox.N)r� rK )r r r r rL T s zMH.closec C s@ g }x6t j| j�D ]&}t jjt jj| j|��r|j|� qW |S )z Return a list of folder names.)r r� r r r� r r� )r rB r� r r r r� Y s
zMH.list_foldersc C s t tjj| j|�| jdd�S )z+Return an MH instance for the named folder.F)r r )r r r r r r )r r� r r r r� a s z
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MH.add_folderc C s` t jj| j|�}t j|�}|dgkr:t jt jj|d�� n|g krDntd| j ��t j|� dS )z-Delete the named folder, which must be empty.z
.mh_sequenceszFolder not empty: %sN)r r r r r� r$ r r� )r r� r Zentriesr r r r� k s
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Basic statistics module.
This module provides functions for calculating statistics of data, including
averages, variance, and standard deviation.
Calculating averages
--------------------
================== =============================================
Function Description
================== =============================================
mean Arithmetic mean (average) of data.
harmonic_mean Harmonic mean of data.
median Median (middle value) of data.
median_low Low median of data.
median_high High median of data.
median_grouped Median, or 50th percentile, of grouped data.
mode Mode (most common value) of data.
================== =============================================
Calculate the arithmetic mean ("the average") of data:
>>> mean([-1.0, 2.5, 3.25, 5.75])
2.625
Calculate the standard median of discrete data:
>>> median([2, 3, 4, 5])
3.5
Calculate the median, or 50th percentile, of data grouped into class intervals
centred on the data values provided. E.g. if your data points are rounded to
the nearest whole number:
>>> median_grouped([2, 2, 3, 3, 3, 4]) #doctest: +ELLIPSIS
2.8333333333...
This should be interpreted in this way: you have two data points in the class
interval 1.5-2.5, three data points in the class interval 2.5-3.5, and one in
the class interval 3.5-4.5. The median of these data points is 2.8333...
Calculating variability or spread
---------------------------------
================== =============================================
Function Description
================== =============================================
pvariance Population variance of data.
variance Sample variance of data.
pstdev Population standard deviation of data.
stdev Sample standard deviation of data.
================== =============================================
Calculate the standard deviation of sample data:
>>> stdev([2.5, 3.25, 5.5, 11.25, 11.75]) #doctest: +ELLIPSIS
4.38961843444...
If you have previously calculated the mean, you can pass it as the optional
second argument to the four "spread" functions to avoid recalculating it:
>>> data = [1, 2, 2, 4, 4, 4, 5, 6]
>>> mu = mean(data)
>>> pvariance(data, mu)
2.5
Exceptions
----------
A single exception is defined: StatisticsError is a subclass of ValueError.
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Return a high-precision sum of the given numeric data as a fraction,
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If ``data`` is empty, ``start`` (defaulting to 0) is returned.
Examples
--------
>>> _sum([3, 2.25, 4.5, -0.5, 1.0], 0.75)
(<class 'float'>, Fraction(11, 1), 5)
Some sources of round-off error will be avoided:
# Built-in sum returns zero.
>>> _sum([1e50, 1, -1e50] * 1000)
(<class 'float'>, Fraction(1000, 1), 3000)
Fractions and Decimals are also supported:
>>> from fractions import Fraction as F
>>> _sum([F(2, 3), F(7, 5), F(1, 4), F(5, 6)])
(<class 'fractions.Fraction'>, Fraction(63, 20), 4)
>>> from decimal import Decimal as D
>>> data = [D("0.1375"), D("0.2108"), D("0.3061"), D("0.0419")]
>>> _sum(data)
(<class 'decimal.Decimal'>, Fraction(6963, 10000), 4)
Mixed types are currently treated as an error, except that int is
allowed.
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rR c C sT t | �| krt| �} t| �}|dk r,td��t| �\}}}||ksFt�t|| |�S )a� Return the sample arithmetic mean of data.
>>> mean([1, 2, 3, 4, 4])
2.8
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Fraction(13, 21)
>>> from decimal import Decimal as D
>>> mean([D("0.5"), D("0.75"), D("0.625"), D("0.375")])
Decimal('0.5625')
If ``data`` is empty, StatisticsError will be raised.
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The harmonic mean, sometimes called the subcontrary mean, is the
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and is often appropriate when averaging quantities which are rates
or ratios, for example speeds. Example:
Suppose an investor purchases an equal value of shares in each of
three companies, with P/E (price/earning) ratios of 2.5, 3 and 10.
What is the average P/E ratio for the investor's portfolio?
>>> harmonic_mean([2.5, 3, 10]) # For an equal investment portfolio.
3.6
Using the arithmetic mean would give an average of about 5.167, which
is too high.
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" c C s\ t | �} t| �}|dkr td��|d dkr8| |d S |d }| |d | | d S dS )aB Return the median (middle value) of numeric data.
When the number of data points is odd, return the middle data point.
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3
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4.0
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When the number of data points is odd, the middle value is returned.
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>>> median_low([1, 3, 5])
3
>>> median_low([1, 3, 5, 7])
3
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3
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5
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3.7
>>> median_grouped([52, 52, 53, 54])
52.5
This calculates the median as the 50th percentile, and should be
used when your data is continuous and grouped. In the above example,
the values 1, 2, 3, etc. actually represent the midpoint of classes
0.5-1.5, 1.5-2.5, 2.5-3.5, etc. The middle value falls somewhere in
class 3.5-4.5, and interpolation is used to estimate it.
Optional argument ``interval`` represents the class interval, and
defaults to 1. Changing the class interval naturally will change the
interpolated 50th percentile value:
>>> median_grouped([1, 3, 3, 5, 7], interval=1)
3.25
>>> median_grouped([1, 3, 3, 5, 7], interval=2)
3.5
This function does not check whether the data points are at least
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``mode`` assumes discrete data, and returns a single value. This is the
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>>> mode([1, 1, 2, 3, 3, 3, 3, 4])
3
This also works with nominal (non-numeric) data:
>>> mode(["red", "blue", "blue", "red", "green", "red", "red"])
'red'
If there is not exactly one most common value, ``mode`` will raise
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r r
z.no unique mode; found %d equally common valueszno mode for empty dataN)rJ rG r )r) rH r r r r � s c s� � dkrt | �� t� fdd�| D ��\}}}t� fdd�| D ��\}}}||krX||ks\t�||d t| � 8 }|dk s�td| ��||fS )a; Return sum of square deviations of sequence data.
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values. The optional argument xbar, if given, should be the mean of
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Use this function when your data is a sample from a population. To
calculate the variance from the entire population, see ``pvariance``.
Examples:
>>> data = [2.75, 1.75, 1.25, 0.25, 0.5, 1.25, 3.5]
>>> variance(data)
1.3720238095238095
If you have already calculated the mean of your data, you can pass it as
the optional second argument ``xbar`` to avoid recalculating it:
>>> m = mean(data)
>>> variance(data, m)
1.3720238095238095
This function does not check that ``xbar`` is actually the mean of
``data``. Giving arbitrary values for ``xbar`` may lead to invalid or
impossible results.
Decimals and Fractions are supported:
>>> from decimal import Decimal as D
>>> variance([D("27.5"), D("30.25"), D("30.25"), D("34.5"), D("41.75")])
Decimal('31.01875')
>>> from fractions import Fraction as F
>>> variance([F(1, 6), F(1, 2), F(5, 3)])
Fraction(67, 108)
rW z*variance requires at least two data pointsr )rD rS rG r ra rA )r) �xbarr r, �ssr r r r " s & c C sH t | �| krt| �} t| �}|dk r,td��t| |�\}}t|| |�S )a� Return the population variance of ``data``.
data should be an iterable of Real-valued numbers, with at least one
value. The optional argument mu, if given, should be the mean of
the data. If it is missing or None, the mean is automatically calculated.
Use this function to calculate the variance from the entire population.
To estimate the variance from a sample, the ``variance`` function is
usually a better choice.
Examples:
>>> data = [0.0, 0.25, 0.25, 1.25, 1.5, 1.75, 2.75, 3.25]
>>> pvariance(data)
1.25
If you have already calculated the mean of the data, you can pass it as
the optional second argument to avoid recalculating it:
>>> mu = mean(data)
>>> pvariance(data, mu)
1.25
This function does not check that ``mu`` is actually the mean of ``data``.
Giving arbitrary values for ``mu`` may lead to invalid or impossible
results.
Decimals and Fractions are supported:
>>> from decimal import Decimal as D
>>> pvariance([D("27.5"), D("30.25"), D("30.25"), D("34.5"), D("41.75")])
Decimal('24.815')
>>> from fractions import Fraction as F
>>> pvariance([F(1, 4), F(5, 4), F(1, 2)])
Fraction(13, 72)
r z*pvariance requires at least one data point)rD rS rG r ra rA )r) �mur r, rc r r r r Q s ' c C s2 t | |�}y|j� S tk
r, tj|�S X dS )z�Return the square root of the sample variance.
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1.0810874155219827
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0.986893273527251
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rlcompleter.cpython-36.pyc 0000644 00000013226 15033571514 0011532 0 ustar 00 3
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and see the list of names defined by the sys module!
Tip: to use the tab key as the completion key, call
readline.parse_and_bind("tab: complete")
Notes:
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the completion to fail). This is a feature -- since readline sets the tty
device in raw (or cbreak) mode, printing a traceback wouldn't work well
without some complicated hoopla to save, reset and restore the tty state.
- The evaluation of the NAME.NAME... form may cause arbitrary application
defined code to be executed if an object with a __getattr__ hook is found.
Since it is the responsibility of the application (or the user) to enable this
feature, I consider this an acceptable risk. More complicated expressions
(e.g. function calls or indexing operations) are *not* evaluated.
- When the original stdin is not a tty device, GNU readline is never
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%7 poplib.cpython-36.pyc 0000644 00000032023 15033571514 0010463 0 ustar 00 3
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Minimal Command Set:
USER name user(name)
PASS string pass_(string)
STAT stat()
LIST [msg] list(msg = None)
RETR msg retr(msg)
DELE msg dele(msg)
NOOP noop()
RSET rset()
QUIT quit()
Optional Commands (some servers support these):
RPOP name rpop(name)
APOP name digest apop(name, digest)
TOP msg n top(msg, n)
UIDL [msg] uidl(msg = None)
CAPA capa()
STLS stls()
UTF8 utf8()
Raises one exception: 'error_proto'.
Instantiate with:
POP3(hostname, port=110)
NB: the POP protocol locks the mailbox from user
authorization until QUIT, so be sure to get in, suck
the messages, and quit, each time you access the
mailbox.
POP is a line-based protocol, which means large mail
messages consume lots of python cycles reading them
line-by-line.
If it's available on your mail server, use IMAP4
instead, it doesn't suffer from the two problems
above.
zUTF-8c C s@ || _ || _d| _| j|�| _| jjd�| _d| _| j� | _ d S )NF�rbr )
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POP3._getrespc C sp | j � }g }d}| j� \}}xH|dkrd|jd�rD|d }|dd � }|| }|j|� | j� \}}q W |||fS )Nr � .s ..r )r r, r. �append)r r/ �listr+ r r0 r r r � _getlongresp� s
zPOP3._getlongrespc C s | j |� | j� S )N)r# r )r r r r r � _shortcmd� s
zPOP3._shortcmdc C s | j |� | j� S )N)r# r4 )r r r r r �_longcmd� s
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POP3._longcmdc C s | j S )N)r )r r r r �
getwelcome� s zPOP3.getwelcomec C s
|| _ d S )N)r )r �levelr r r �set_debuglevel� s zPOP3.set_debuglevelc C s | j d| �S )zVSend user name, return response
(should indicate password required).
zUSER %s)r5 )r �userr r r r: � s z POP3.userc C s | j d| �S )z�Send password, return response
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zPASS %s)r5 )r Zpswdr r r �pass_� s z
POP3.pass_c C sF | j d�}|j� }| jr&tdt|�� t|d �}t|d �}||fS )z]Get mailbox status.
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ZSTATz*stat*r r$ )r5 �splitr r r �int)r ZretvalZretsZ numMessagesZ sizeMessagesr r r �stat� s
z POP3.statNc C s |dk r| j d| �S | jd�S )a Request listing, return result.
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single response: the "scan listing" for that message.
NzLIST %sZLIST)r5 r6 )r �whichr r r r3 � s z POP3.listc C s | j d| �S )zoRetrieve whole message number 'which'.
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zRETR %s)r6 )r r? r r r �retr� s z POP3.retrc C s | j d| �S )zFDelete message number 'which'.
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zDELE %s)r5 )r r? r r r �dele� s z POP3.delec C s
| j d�S )zXDoes nothing.
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ZNOOP)r5 )r r r r �noop s z POP3.noopc C s
| j d�S )z(Unmark all messages marked for deletion.ZRSET)r5 )r r r r �rset s z POP3.rsetc C s | j d�}| j� |S )zDSignoff: commit changes on server, unlock mailbox, close connection.ZQUIT)r5 �close)r r/ r r r �quit s
z POP3.quitc C s� z | j }d| _ |dk r |j� W d| j}d| _|dk r�zVy|jtj� W n@ tk
r� } z$|jtjkrxt |dd�dkrx� W Y dd}~X nX W d|j� X X dS )z8Close the connection without assuming anything about it.NZwinerrorr i&' )
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POP3.closec C s | j d| �S )zNot sure what this does.zRPOP %s)r5 )r r: r r r �rpop2 s z POP3.rpops \+OK.[^<]*(<.*>)c C s\ t || j�}| jj| j�}|s&td��ddl}|jd�| }|j|�j � }| j
d||f �S )a Authorisation
- only possible if server has supplied a timestamp in initial greeting.
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z!-ERR APOP not supported by serverr Nr z
APOP %s %s) r! r" � timestamp�matchr r �hashlib�groupZmd5Z hexdigestr5 )r r: ZpasswordZsecret�mrM Zdigestr r r �apop9 s z POP3.apopc C s | j d||f �S )z�Retrieve message header of message number 'which'
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NzUIDL %sZUIDL)r5 r6 )r r? r r r �uidlW s z POP3.uidlc C s
| j d�S )zITry to enter UTF-8 mode (see RFC 6856). Returns server response.
ZUTF8)r5 )r r r r �utf8c s z POP3.utf8c C st dd� }i }y8| j d�}|d }x |D ]}||�\}}|||< q&W W n* tk
rn } ztd��W Y dd}~X nX |S )a Return server capabilities (RFC 2449) as a dictionary
>>> c=poplib.POP3('localhost')
>>> c.capa()
{'IMPLEMENTATION': ['Cyrus', 'POP3', 'server', 'v2.2.12'],
'TOP': [], 'LOGIN-DELAY': ['0'], 'AUTH-RESP-CODE': [],
'EXPIRE': ['NEVER'], 'USER': [], 'STLS': [], 'PIPELINING': [],
'UIDL': [], 'RESP-CODES': []}
>>>
Really, according to RFC 2449, the cyrus folks should avoid
having the implementation split into multiple arguments...
c S s" | j d�j� }|d |dd � fS )N�asciir r )�decoder< )r Zlstr r r � _parsecapv s z POP3.capa.<locals>._parsecapZCAPAr z!-ERR CAPA not supported by serverN)r6 r ) r rV �capsr/ ZrawcapsZcaplineZcapnmZcapargsZ_errr r r �capai s
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�POP3_SSLa POP3 client class over SSL connection
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context=None)
hostname - the hostname of the pop3 over ssl server
port - port number
keyfile - PEM formatted file that contains your private key
certfile - PEM formatted certificate chain file
context - a ssl.SSLContext
See the methods of the parent class POP3 for more documentation.
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calendar.cpython-36.opt-1.pyc 0000644 00000062434 15033571514 0011717 0 ustar 00 3
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z_localized_day.__getitem__c C s dS )Nr? r )r r r r r; T s z_localized_day.__len__N)r r! r" r< r@ r r9 r; r r r r r> E s r> z%Az%az%Bz%br? c C s$ | d dko"| d dkp"| d dkS )z5Return True for leap years, False for non-leap years.� r �d i� r )�yearr r r r d s c C s@ | d8 } |d8 }|d | d |d | d |d | d S )zFReturn number of leap years in range [y1, y2).
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Base calendar class. This class doesn't do any formatting. It simply
provides data to subclasses.
r c C s
|| _ d S )N)r )r r r r r r � s zCalendar.__init__c C s
| j d S )Nr? )�
_firstweekday)r r r r �getfirstweekday� s zCalendar.getfirstweekdayc C s
|| _ d S )N)rI )r r r r r r � s zCalendar.setfirstweekdayc c s* x$t | j| jd �D ]}|d V qW dS )zt
Return an iterator for one week of weekday numbers starting with the
configured first one.
r? N)r< r )r r- r r r � iterweekdays� s zCalendar.iterweekdaysc c s� t j||d�}|j� | j d }|t j|d�8 }t jdd�}xH|V y ||7 }W n tk
rf P Y nX |j|kr>|j� | jkr>P q>W dS )z�
Return an iterator for one month. The iterator will yield datetime.date
values and will always iterate through complete weeks, so it will yield
dates outside the specified month.
r# r? )�daysN)r) r* r r Z timedelta�
OverflowErrorr
)r rC r
r* rL Zonedayr r r �itermonthdates� s zCalendar.itermonthdatesc c s4 x.t | j||�| j�D ]\}}||d fV qW dS )z�
Like itermonthdates(), but will yield (day number, weekday number)
tuples. For days outside the specified month the day number is 0.
r? N)� enumerate�
itermonthdaysr )r rC r
r- �dr r r �itermonthdays2� s zCalendar.itermonthdays2c c sf t ||�\}}|| j d }td|�E dH td|d �E dH | j| | d }td|�E dH dS )z�
Like itermonthdates(), but will yield day numbers. For days outside
the specified month the day number is 0.
r? r Nr# )r
r r r< )r rC r
rG rH Z days_beforeZ
days_afterr r r rP � s zCalendar.itermonthdaysc s. t | j||��� � fdd�tdt� �d�D �S )z�
Return a matrix (list of lists) representing a month's calendar.
Each row represents a week; week entries are datetime.date values.
c s g | ]}� ||d � �qS )r? r )r, r- )�datesr r r. � s z/Calendar.monthdatescalendar.<locals>.<listcomp>r r? )�listrN r< �len)r rC r
r )rS r �monthdatescalendar� s zCalendar.monthdatescalendarc s. t | j||��� � fdd�tdt� �d�D �S )z�
Return a matrix representing a month's calendar.
Each row represents a week; week entries are
(day number, weekday number) tuples. Day numbers outside this month
are zero.
c s g | ]}� ||d � �qS )r? r )r, r- )rL r r r. � s z/Calendar.monthdays2calendar.<locals>.<listcomp>r r? )rT rR r< rU )r rC r
r )rL r �monthdays2calendar� s zCalendar.monthdays2calendarc s. t | j||��� � fdd�tdt� �d�D �S )z�
Return a matrix representing a month's calendar.
Each row represents a week; days outside this month are zero.
c s g | ]}� ||d � �qS )r? r )r, r- )rL r r r. � s z.Calendar.monthdayscalendar.<locals>.<listcomp>r r? )rT rP r< rU )r rC r
r )rL r �monthdayscalendar� s zCalendar.monthdayscalendar� c s> ��fdd�t ttd �D �� � �fdd�t dt� ���D �S )a'
Return the data for the specified year ready for formatting. The return
value is a list of month rows. Each month row contains up to width months.
Each month contains between 4 and 6 weeks and each week contains 1-7
days. Days are datetime.date objects.
c s g | ]}� j �|��qS r )rV )r, r- )r rC r r r. � s z.Calendar.yeardatescalendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )�months�widthr r r. � s r )r< �JanuaryrU )r rC r[ r )rZ r r[ rC r �yeardatescalendar� s zCalendar.yeardatescalendarc s> ��fdd�t ttd �D �� � �fdd�t dt� ���D �S )z�
Return the data for the specified year ready for formatting (similar to
yeardatescalendar()). Entries in the week lists are
(day number, weekday number) tuples. Day numbers outside this month are
zero.
c s g | ]}� j �|��qS r )rW )r, r- )r rC r r r. � s z.Calendar.yeardays2calendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )rZ r[ r r r. � s r )r< r\ rU )r rC r[ r )rZ r r[ rC r �yeardays2calendar� s zCalendar.yeardays2calendarc s> ��fdd�t ttd �D �� � �fdd�t dt� ���D �S )z�
Return the data for the specified year ready for formatting (similar to
yeardatescalendar()). Entries in the week lists are day numbers.
Day numbers outside this month are zero.
c s g | ]}� j �|��qS r )rX )r, r- )r rC r r r. � s z-Calendar.yeardayscalendar.<locals>.<listcomp>r/ c s g | ]}� ||� � �qS r r )r, r- )rZ r[ r r r. s r )r< r\ rU )r rC r[ r )rZ r r[ rC r �yeardayscalendar� s zCalendar.yeardayscalendarN)r )rY )rY )rY )r r! r" �__doc__r rJ r �propertyr rK rN rR rP rV rW rX r] r^ r_ r r r r r � s
c @ sj e Zd ZdZdd� Zdd� Zdd� Zdd � Zd
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Subclass of Calendar that outputs a calendar as a simple plain text
similar to the UNIX program cal.
c C s t | j||�dd� dS )z3
Print a single week (no newline).
� )�endN)�print�
formatweek)r �theweekr[ r r r �prweek
s zTextCalendar.prweekc C s |dkrd}nd| }|j |�S )z*
Returns a formatted day.
r r0 z%2i)�center)r rD r r[ �sr r r � formatday s zTextCalendar.formatdayc s dj � �fdd�|D ��S )zA
Returns a single week in a string (no newline).
rb c 3 s | ]\}}� j ||��V qd S )N)rj )r, rQ �wd)r r[ r r � <genexpr> s z*TextCalendar.formatweek.<locals>.<genexpr>)�join)r rf r[ r )r r[ r re s zTextCalendar.formatweekc C s( |dkrt }nt}|| d|� j|�S )z4
Returns a formatted week day name.
� N)r r rh )r rD r[ �namesr r r �
formatweekday s zTextCalendar.formatweekdayc s dj � �fdd�� j� D ��S )z-
Return a header for a week.
rb c 3 s | ]}� j |��V qd S )N)rp )r, r- )r r[ r r rl . s z0TextCalendar.formatweekheader.<locals>.<genexpr>)rm rK )r r[ r )r r[ r �formatweekheader* s z TextCalendar.formatweekheaderTc C s" t | }|rd||f }|j|�S )z0
Return a formatted month name.
z%s %r)r rh )r �theyear�themonthr[ �withyearri r r r �formatmonthname0 s z TextCalendar.formatmonthnamer c C s t | j||||�dd� dS )z+
Print a month's calendar.
r0 )rc N)rd � formatmonth)r rr rs �w�lr r r r 9 s zTextCalendar.prmonthc C s� t d|�}t d|�}| j||d|d d �}|j� }|d| 7 }|| j|�j� 7 }|d| 7 }x4| j||�D ]$}|| j||�j� 7 }|d| 7 }qnW |S )z@
Return a month's calendar string (multi-line).
r$ r# r? �
)�maxru �rstriprq rW re )r rr rs rw rx ri �weekr r r rv ? s
zTextCalendar.formatmonthr$ r# � rY c s� t d|�}t d|�}t d|�}|d d d � g }|j}|t��j� | ||d �j� � |d| � �j|���x@t�j�|��D �]*\}} t|| d t ||d d d��}
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Returns a year's calendar as a multi-line string.
r$ r# r? ry r: c 3 s | ]}�j �|� d �V qdS )FN)ru )r, �k)�colwidthr rr r r rl ` s z*TextCalendar.formatyear.<locals>.<genexpr>c 3 s | ]
}� V qd S )Nr )r, r~ )�headerr r rl d s c s s | ]}t |�V qd S )N)rU )r, �calr r r rl h s r0 )rz �append�reprrh r{ rq rO r^ r< �min� formatstringrU re rm )r rr rw rx �c�m�v�ar- �rowrZ ro ZheadersZheight�jZweeksr� r )r r� r rr r �
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zTextCalendar.formatyearc C s t | j|||||�� dS )zPrint a year's calendar.N)rd r� )r rr rw rx r� r� r r r �pryeart s zTextCalendar.pryearN)T)r r )r r )r$ r# r} rY )r r r} rY )r r! r" r` rg rj re rp rq ru r rv r� r� r r r r r s
%c @ sj e Zd ZdZdddddddgZd d
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This calendar returns complete HTML pages.
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Return a day as a table cell.
r z <td class="noday"> </td>z<td class="%s">%d</td>N)�
cssclasses)r rD r r r r rj � s zHTMLCalendar.formatdayc s dj � fdd�|D ��}d| S )z8
Return a complete week as a table row.
r0 c 3 s | ]\}}� j ||�V qd S )N)rj )r, rQ rk )r r r rl � s z*HTMLCalendar.formatweek.<locals>.<genexpr>z <tr>%s</tr>)rm )r rf ri r )r r re � s zHTMLCalendar.formatweekc C s d| j | t| f S )z:
Return a weekday name as a table header.
z<th class="%s">%s</th>)r� r )r rD r r r rp � s zHTMLCalendar.formatweekdayc s$ dj � fdd�� j� D ��}d| S )z<
Return a header for a week as a table row.
r0 c 3 s | ]}� j |�V qd S )N)rp )r, r- )r r r rl � s z0HTMLCalendar.formatweekheader.<locals>.<genexpr>z <tr>%s</tr>)rm rK )r ri r )r r rq � s z HTMLCalendar.formatweekheaderTc C s* |rdt | |f }n dt | }d| S )z5
Return a month name as a table row.
z%s %sz%sz.<tr><th colspan="7" class="month">%s</th></tr>)r )r rr rs rt ri r r r ru � s z HTMLCalendar.formatmonthnamec C s� g }|j }|d� |d� || j|||d�� |d� || j� � |d� x*| j||�D ]}|| j|�� |d� qXW |d� |d� dj|�S )z6
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z@<table border="0" cellpadding="0" cellspacing="0" class="month">ry )rt z</table>r0 )r� ru rq rW re rm )r rr rs rt r� r� r| r r r rv � s zHTMLCalendar.formatmonthrY c C s� g }|j }t|d�}|d� |d� |d||f � xntttd |�D ]Z}t|t|| d��}|d� x0|D ](}|d� || j||d d
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r# z?<table border="0" cellpadding="0" cellspacing="0" class="year">ry z.<tr><th colspan="%d" class="year">%s</th></tr>r/ r: z<tr>z<td>F)rt z</td>z</tr>z</table>r0 )r� rz r< r\ r� rv rm )r rr r[ r� r� r- rZ r� r r r r� � s
zHTMLCalendar.formatyear� calendar.cssNc C s� |dkrt j� }g }|j}|d| � |d� |d� |d� |d| � |dk r^|d| � |d| � |d � |d
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Return a formatted year as a complete HTML page.
Nz$<?xml version="1.0" encoding="%s"?>
zn<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
z<html>
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r0 �xmlcharrefreplace)�sys�getdefaultencodingr� r� rm �encode)r rr r[ �css�encodingr� r� r r r �formatyearpage� s$ zHTMLCalendar.formatyearpage)T)T)rY )rY r� N)
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|| _ d S )N)�locale)r r� r r r r � s zdifferent_locale.__init__c C s" t jt j�| _t jt j| j� d S )N)�_localeZ getlocale�LC_TIME� oldlocale� setlocaler� )r r r r � __enter__� s zdifferent_locale.__enter__c G s t jt j| j� d S )N)r� r� r� r� )r �argsr r r �__exit__� s zdifferent_locale.__exit__N)r r! r" r r� r� r r r r r� � s r� c @ s, e Zd ZdZd dd�Zdd� Zd d d
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This class can be passed a locale name in the constructor and will return
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r Nc C s& t j| |� |d kr tj� }|| _d S )N)r r r� �getdefaultlocaler� )r r r� r r r r � s zLocaleTextCalendar.__init__c
C sB t | j��. |dkrt}nt}|| }|d |� j|�S Q R X d S )Nrn )r� r� r r rh )r rD r[ ro �namer r r rp s z LocaleTextCalendar.formatweekdayTc
C s8 t | j��$ t| }|r$d||f }|j|�S Q R X d S )Nz%s %r)r� r� r rh )r rr rs r[ rt ri r r r ru s
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This class can be passed a locale name in the constructor and will return
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r Nc C s& t j| |� |d kr tj� }|| _d S )N)r r r� r� r� )r r r� r r r r s zLocaleHTMLCalendar.__init__c
C s0 t | j�� t| }d| j| |f S Q R X d S )Nz<th class="%s">%s</th>)r� r� r r� )r rD ri r r r rp ! s z LocaleHTMLCalendar.formatweekdayTc
C s6 t | j��" t| }|r$d||f }d| S Q R X d S )Nz%s %sz.<tr><th colspan="7" class="month">%s</th></tr>)r� r� r )r rr rs rt ri r r r ru & s
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r �__all__r r r r r r r �<module> s * fileinput.cpython-36.opt-1.pyc 0000644 00000031542 15033571514 0012141 0 ustar 00 3
\�8 � @ s� d Z ddlZddlZddddddd d
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� Zd"d d�Zd d � Zed kr�e� dS )#a� Helper class to quickly write a loop over all standard input files.
Typical use is:
import fileinput
for line in fileinput.input():
process(line)
This iterates over the lines of all files listed in sys.argv[1:],
defaulting to sys.stdin if the list is empty. If a filename is '-' it
is also replaced by sys.stdin. To specify an alternative list of
filenames, pass it as the argument to input(). A single file name is
also allowed.
Functions filename(), lineno() return the filename and cumulative line
number of the line that has just been read; filelineno() returns its
line number in the current file; isfirstline() returns true iff the
line just read is the first line of its file; isstdin() returns true
iff the line was read from sys.stdin. Function nextfile() closes the
current file so that the next iteration will read the first line from
the next file (if any); lines not read from the file will not count
towards the cumulative line count; the filename is not changed until
after the first line of the next file has been read. Function close()
closes the sequence.
Before any lines have been read, filename() returns None and both line
numbers are zero; nextfile() has no effect. After all lines have been
read, filename() and the line number functions return the values
pertaining to the last line read; nextfile() has no effect.
All files are opened in text mode by default, you can override this by
setting the mode parameter to input() or FileInput.__init__().
If an I/O error occurs during opening or reading a file, the OSError
exception is raised.
If sys.stdin is used more than once, the second and further use will
return no lines, except perhaps for interactive use, or if it has been
explicitly reset (e.g. using sys.stdin.seek(0)).
Empty files are opened and immediately closed; the only time their
presence in the list of filenames is noticeable at all is when the
last file opened is empty.
It is possible that the last line of a file doesn't end in a newline
character; otherwise lines are returned including the trailing
newline.
Class FileInput is the implementation; its methods filename(),
lineno(), fileline(), isfirstline(), isstdin(), nextfile() and close()
correspond to the functions in the module. In addition it has a
readline() method which returns the next input line, and a
__getitem__() method which implements the sequence behavior. The
sequence must be accessed in strictly sequential order; sequence
access and readline() cannot be mixed.
Optional in-place filtering: if the keyword argument inplace=1 is
passed to input() or to the FileInput constructor, the file is moved
to a backup file and standard output is directed to the input file.
This makes it possible to write a filter that rewrites its input file
in place. If the keyword argument backup=".<some extension>" is also
given, it specifies the extension for the backup file, and the backup
file remains around; by default, the extension is ".bak" and it is
deleted when the output file is closed. In-place filtering is
disabled when standard input is read. XXX The current implementation
does not work for MS-DOS 8+3 filesystems.
XXX Possible additions:
- optional getopt argument processing
- isatty()
- read(), read(size), even readlines()
� N�input�close�nextfile�filename�lineno�
filelineno�fileno� isfirstline�isstdin� FileInput�hook_compressed� hook_encodedF� �rc C s( t rt jrtd��t| |||||�a t S )a Return an instance of the FileInput class, which can be iterated.
The parameters are passed to the constructor of the FileInput class.
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codeop.cpython-36.opt-1.pyc 0000644 00000014200 15033571514 0011403 0 ustar 00 3
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dS )a[ Utilities to compile possibly incomplete Python source code.
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and:
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- Return None if the command is incomplete
- Raise SyntaxError, ValueError or OverflowError if the command is a
syntax error (OverflowError and ValueError can be produced by
malformed literals).
Approach:
First, check if the source consists entirely of blank lines and
comments; if so, replace it with 'pass', because the built-in
parser doesn't always do the right thing for these.
Compile three times: as is, with \n, and with \n\n appended. If it
compiles as is, it's complete. If it compiles with one \n appended,
we expect more. If it doesn't compile either way, we compare the
error we get when compiling with \n or \n\n appended. If the errors
are the same, the code is broken. But if the errors are different, we
expect more. Not intuitive; not even guaranteed to hold in future
releases; but this matches the compiler's behavior from Python 1.4
through 2.2, at least.
Caveat:
It is possible (but not likely) that the parser stops parsing with a
successful outcome before reaching the end of the source; in this
case, trailing symbols may be ignored instead of causing an error.
For example, a backslash followed by two newlines may be followed by
arbitrary garbage. This will be fixed once the API for the parser is
better.
The two interfaces are:
compile_command(source, filename, symbol):
Compiles a single command in the manner described above.
CommandCompiler():
Instances of this class have __call__ methods identical in
signature to compile_command; the difference is that if the
instance compiles program text containing a __future__ statement,
the instance 'remembers' and compiles all subsequent program texts
with the statement in force.
The module also provides another class:
Compile():
Instances of this class act like the built-in function compile,
but with 'memory' in the sense described above.
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The Python Debugger Pdb
=======================
To use the debugger in its simplest form:
>>> import pdb
>>> pdb.run('<a statement>')
The debugger's prompt is '(Pdb) '. This will stop in the first
function call in <a statement>.
Alternatively, if a statement terminated with an unhandled exception,
you can use pdb's post-mortem facility to inspect the contents of the
traceback:
>>> <a statement>
<exception traceback>
>>> import pdb
>>> pdb.pm()
The commands recognized by the debugger are listed in the next
section. Most can be abbreviated as indicated; e.g., h(elp) means
that 'help' can be typed as 'h' or 'help' (but not as 'he' or 'hel',
nor as 'H' or 'Help' or 'HELP'). Optional arguments are enclosed in
square brackets. Alternatives in the command syntax are separated
by a vertical bar (|).
A blank line repeats the previous command literally, except for
'list', where it lists the next 11 lines.
Commands that the debugger doesn't recognize are assumed to be Python
statements and are executed in the context of the program being
debugged. Python statements can also be prefixed with an exclamation
point ('!'). This is a powerful way to inspect the program being
debugged; it is even possible to change variables or call functions.
When an exception occurs in such a statement, the exception name is
printed but the debugger's state is not changed.
The debugger supports aliases, which can save typing. And aliases can
have parameters (see the alias help entry) which allows one a certain
level of adaptability to the context under examination.
Multiple commands may be entered on a single line, separated by the
pair ';;'. No intelligence is applied to separating the commands; the
input is split at the first ';;', even if it is in the middle of a
quoted string.
If a file ".pdbrc" exists in your home directory or in the current
directory, it is read in and executed as if it had been typed at the
debugger prompt. This is particularly useful for aliases. If both
files exist, the one in the home directory is read first and aliases
defined there can be overridden by the local file. This behavior can be
disabled by passing the "readrc=False" argument to the Pdb constructor.
Aside from aliases, the debugger is not directly programmable; but it
is implemented as a class from which you can derive your own debugger
class, which you can make as fancy as you like.
Debugger commands
=================
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(com) end
(Pdb)
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Type a line containing just 'end' to terminate the commands.
The commands are executed when the breakpoint is hit.
To remove all commands from a breakpoint, type commands and
follow it immediately with end; that is, give no commands.
With no bpnumber argument, commands refers to the last
breakpoint set.
You can use breakpoint commands to start your program up
again. Simply use the continue command, or step, or any other
command that resumes execution.
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immediately followed by end). This is because any time you
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command list, leading to ambiguities about which list to
execute.
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Disables the breakpoints given as a space separated list of
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zPdb.do_disablec C s� |j dd�}y |d }W n tk
r0 d}Y nX y| j|d j� �}W nH tk
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Set a new condition for the breakpoint, an expression which
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rb | jd� Y nv tk
r� } z| j|� W Y dd}~X nLX ||_|dkr�|dkr�d| }nd}| jd||j f � n| jd|j � dS ) a� ignore bpnumber [count]
Set the ignore count for the given breakpoint number. If
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z
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�rl } z| j|� W Y dd}~X nX | j|� | jd| � �q,W dS )
a= cl(ear) filename:lineno
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With a space separated list of breakpoint numbers, clear
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Print a stack trace, with the most recent frame at the bottom.
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N)�print_stack_trace)r. r� r r r �do_where� s z Pdb.do_wherec C s> || _ | j| j d | _| jj| _| j| j| j � d | _d S )Nr )rY rX rZ r# r` rt r )r. r� r r r �
_select_frame� s
zPdb._select_framec C sx | j dkr| jd� dS yt|p"d�}W n" tk
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Move the current frame count (default one) levels up in the
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Move the current frame count (default one) levels down in the
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z Pdb.do_downc C sf |rPy t |�}W n" tk
r2 | jd| � dS X || jjkrT| jd� dS nd}| j| j|� dS )aN unt(il) [lineno]
Without argument, continue execution until the line with a
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number, continue execution until a line with a number greater
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Execute the current line, stop at the first possible occasion
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Continue execution until the next line in the current function
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Restart the debugged python program. If a string is supplied
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r Nr )�shlexr� �argvr� r )r. r� r Zargv0r r r �do_run� s z
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rL | jd� Y nnX y:|| j_| j| j d |f| j| j < | j| j| j � W n0 tk
r� } z| jd| � W Y dd}~X nX dS )a� j(ump) lineno
Set the next line that will be executed. Only available in
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Quit from the debugger. The program being executed is aborted.
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Handles the receipt of EOF as a command.
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z
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Print the argument list of the current function.
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rv zNot yet returned!N)r` rR r� r� )r. r� r r r � do_retvalw s
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C sN yt || jj| j�S tj� d d� }| jtj|� d j � � � Y nX d S )Nr� r rx )
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C s* y| j t| j|��� W n Y nX dS )z@p expression
Print the value of the expression.
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Pretty-print the value of the expression.
N)rR �pprintZpformatr& )r. r� r r r �do_pp� s z Pdb.do_ppc C sd d| _ d}|r�|dkr�y^d|krX|jd�\}}t|j� �}t|j� �}||k rr|| }nt|j� �}td|d �}W q� tk
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List source code for the current file. Without arguments,
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line. With one argument, list 11 lines starting at that line.
With two arguments, list the given range; if the second
argument is less than the first, it is a count.
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r' Nr� r� r � zError in argument: %r�
z[EOF])rs r� r� rg r r� r� r rZ rn r] rm �get_file_breaksr� �getlinesr" � _print_linesr r� rR rQ )r. r� Zlast�firstr � breaklistr% r r r �do_list� s>
z Pdb.do_listc C sh | j jj}| j|�}yt| j �\}}W n* tk
rP } z| j|� dS d}~X nX | j|||| j � dS )z\longlist | ll
List the whole source code for the current function or frame.
N)rZ r] rm r, r& r r� r. )r. r� r r0 r% r r� r r r � do_longlist� s
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C s� |r|j }| jj|d
�}nd }}x�t||�D ]|\}}t|�jd�} t| �dk rX| d7 } ||krj| d7 } n| d7 } ||kr�| d7 } n||kr�| d7 } | j| d |j� � q.W d S ) zPrint a range of lines.r r� r r� �Bz->z>>� Nrx rx ) rn r> r� r r� �rjustr� rR r� )
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Print the type of the argument.
Nz Function %sz Method %sz Class %s.%s)
r& r� r� rR r� r� � __class__�typer r )r. r� �valuer* r r r � do_whatis s.
z
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Display the value of the expression if it changed, each time execution
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r< | jd| � Y qPX n| j j| jd� dS )z�undisplay [expression]
Do not display the expression any more in the current frame.
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znot displaying %sN)r; r� rZ r� r� rf )r. r� r r r � do_undisplayG s zPdb.do_undisplayc s � fdd�| j j| ji �D �S )Nc s g | ]}|j � �r|�qS r )r� )r� r )r� r r r� W s z*Pdb.complete_undisplay.<locals>.<listcomp>)r; r� rZ )r. r� r r� r� r )r� r �complete_undisplayV s zPdb.complete_undisplayc C s* | j jj� }|j| j� tjd|d� dS )z�interact
Start an interactive interpreter whose global namespace
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z
*interactive*)ZlocalN)rZ r" r� r� r` r* �interact)r. r� r� r r r � do_interactZ s zPdb.do_interactc C s� |j � }t|�dkrLt| jj� �}x$|D ] }| jd|| j| f � q(W dS |d | jkr�t|�dkr�| jd|d | j|d f � n dj|dd� �| j|d < dS )ac alias [name [command [parameter parameter ...] ]]
Create an alias called 'name' that executes 'command'. The
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parameters can be indicated by %1, %2, and so on, while %* is
replaced by all the parameters. If no command is given, the
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aliases are listed.
Aliases may be nested and can contain anything that can be
legally typed at the pdb prompt. Note! You *can* override
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are then hidden until the alias is removed. Aliasing is
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other words in the line are left alone.
As an example, here are two useful aliases (especially when
placed in the .pdbrc file):
# Print instance variables (usage "pi classInst")
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# Print instance variables in self
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r z%s = %sNr r� )r� r� �sortedr: r� rR rG )r. r� r� r� r� r r r �do_aliasd s
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Delete the specified alias.
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do_unalias� s
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Without argument, print the list of available commands.
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"help exec" gives help on the ! command.
Zhelp_r� zNo help for %rr� zJNo help for %r; please do not run Python with -OO if you need command helpN) r7 r8 �do_helprr r� r� r� �flags�optimizerR r r� )r. r� ZtopicZcommandr r r rJ � s z Pdb.do_helpc C s | j | jjpdj� � dS )a� (!) statement
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(Pdb)
r2 N)rR � help_execr rg )r. r r r rM � s
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|�}q�W t jj||�}t jj|�r�|S q�W dS )z�Helper function for break/clear parsing -- may be overridden.
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the Python Cookbook, published by O'Reilly.
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Command line usage:
python timeit.py [-n N] [-r N] [-s S] [-t] [-c] [-p] [-h] [--] [statement]
Options:
-n/--number N: how many times to execute 'statement' (default: see below)
-r/--repeat N: how many times to repeat the timer (default 3)
-s/--setup S: statement to be executed once initially (default 'pass').
Execution time of this setup statement is NOT timed.
-p/--process: use time.process_time() (default is time.perf_counter())
-t/--time: use time.time() (deprecated)
-c/--clock: use time.clock() (deprecated)
-v/--verbose: print raw timing results; repeat for more digits precision
-u/--unit: set the output time unit (usec, msec, or sec)
-h/--help: print this usage message and exit
--: separate options from statement, use when statement starts with -
statement: statement to be timed (default 'pass')
A multi-line statement may be given by specifying each line as a
separate argument; indented lines are possible by enclosing an
argument in quotes and using leading spaces. Multiple -s options are
treated similarly.
If -n is not given, a suitable number of loops is calculated by trying
successive powers of 10 until the total time is at least 0.2 seconds.
Note: there is a certain baseline overhead associated with executing a
pass statement. It differs between versions. The code here doesn't try
to hide it, but you should be aware of it. The baseline overhead can be
measured by invoking the program without arguments.
Classes:
Timer
Functions:
timeit(string, string) -> float
repeat(string, string) -> list
default_timer() -> float
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Regular expressions can contain both special and ordinary characters.
Most ordinary characters, like "A", "a", or "0", are the simplest
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The special characters are:
"." Matches any character except a newline.
"^" Matches the start of the string.
"$" Matches the end of the string or just before the newline at
the end of the string.
"*" Matches 0 or more (greedy) repetitions of the preceding RE.
Greedy means that it will match as many repetitions as possible.
"+" Matches 1 or more (greedy) repetitions of the preceding RE.
"?" Matches 0 or 1 (greedy) of the preceding RE.
*?,+?,?? Non-greedy versions of the previous three special characters.
{m,n} Matches from m to n repetitions of the preceding RE.
{m,n}? Non-greedy version of the above.
"\\" Either escapes special characters or signals a special sequence.
[] Indicates a set of characters.
A "^" as the first character indicates a complementing set.
"|" A|B, creates an RE that will match either A or B.
(...) Matches the RE inside the parentheses.
The contents can be retrieved or matched later in the string.
(?aiLmsux) The letters set the corresponding flags defined below.
(?:...) Non-grouping version of regular parentheses.
(?P<name>...) The substring matched by the group is accessible by name.
(?P=name) Matches the text matched earlier by the group named name.
(?#...) A comment; ignored.
(?=...) Matches if ... matches next, but doesn't consume the string.
(?!...) Matches if ... doesn't match next.
(?<=...) Matches if preceded by ... (must be fixed length).
(?<!...) Matches if not preceded by ... (must be fixed length).
(?(id/name)yes|no) Matches yes pattern if the group with id/name matched,
the (optional) no pattern otherwise.
The special sequences consist of "\\" and a character from the list
below. If the ordinary character is not on the list, then the
resulting RE will match the second character.
\number Matches the contents of the group of the same number.
\A Matches only at the start of the string.
\Z Matches only at the end of the string.
\b Matches the empty string, but only at the start or end of a word.
\B Matches the empty string, but not at the start or end of a word.
\d Matches any decimal digit; equivalent to the set [0-9] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode digits.
\D Matches any non-digit character; equivalent to [^\d].
\s Matches any whitespace character; equivalent to [ \t\n\r\f\v] in
bytes patterns or string patterns with the ASCII flag.
In string patterns without the ASCII flag, it will match the whole
range of Unicode whitespace characters.
\S Matches any non-whitespace character; equivalent to [^\s].
\w Matches any alphanumeric character; equivalent to [a-zA-Z0-9_]
in bytes patterns or string patterns with the ASCII flag.
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range of Unicode alphanumeric characters (letters plus digits
plus underscore).
With LOCALE, it will match the set [0-9_] plus characters defined
as letters for the current locale.
\W Matches the complement of \w.
\\ Matches a literal backslash.
This module exports the following functions:
match Match a regular expression pattern to the beginning of a string.
fullmatch Match a regular expression pattern to all of a string.
search Search a string for the presence of a pattern.
sub Substitute occurrences of a pattern found in a string.
subn Same as sub, but also return the number of substitutions made.
split Split a string by the occurrences of a pattern.
findall Find all occurrences of a pattern in a string.
finditer Return an iterator yielding a Match object for each match.
compile Compile a pattern into a Pattern object.
purge Clear the regular expression cache.
escape Backslash all non-alphanumerics in a string.
Each function other than purge and escape can take an optional 'flags' argument
consisting of one or more of the following module constants, joined by "|".
A, L, and U are mutually exclusive.
A ASCII For string patterns, make \w, \W, \b, \B, \d, \D
match the corresponding ASCII character categories
(rather than the whole Unicode categories, which is the
default).
For bytes patterns, this flag is the only available
behaviour and needn't be specified.
I IGNORECASE Perform case-insensitive matching.
L LOCALE Make \w, \W, \b, \B, dependent on the current locale.
M MULTILINE "^" matches the beginning of lines (after a newline)
as well as the string.
"$" matches the end of lines (before a newline) as well
as the end of the string.
S DOTALL "." matches any character at all, including the newline.
X VERBOSE Ignore whitespace and comments for nicer looking RE's.
U UNICODE For compatibility only. Ignored for string patterns (it
is the default), and forbidden for bytes patterns.
This module also defines an exception 'error'.
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d:dd�Zd;dd�Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� ZdZd'd(� Zd)d*� Zd+Zd,d-� Zd.d/� Zd0d1� Z d2d3� Z d4d5� Z d6d7� Z d8d9� Z dS )<r a� Store a sequence of fields, reading multipart/form-data.
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The items are either a Python list (if there's multiple values) or
another FieldStorage or MiniFieldStorage object. If it's a single
object, it has the following attributes:
name: the field name, if specified; otherwise None
filename: the filename, if specified; otherwise None; this is the
client side filename, *not* the file name on which it is
stored (that's a temporary file you don't deal with)
value: the value as a *string*; for file uploads, this
transparently reads the file every time you request the value
and returns *bytes*
file: the file(-like) object from which you can read the data *as
bytes* ; None if the data is stored a simple string
type: the content-type, or None if not specified
type_options: dictionary of options specified on the content-type
line
disposition: content-disposition, or None if not specified
disposition_options: dictionary of corresponding options
headers: a dictionary(-like) object (sometimes email.message.Message or a
subclass thereof) containing *all* headers
The class is subclassable, mostly for the purpose of overriding
the make_file() method, which is called internally to come up with
a file open for reading and writing. This makes it possible to
override the default choice of storing all files in a temporary
directory and unlinking them as soon as they have been opened.
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headers : header dictionary-like object; default:
taken from environ as per CGI spec
outerboundary : terminating multipart boundary
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environ : environment dictionary; default: os.environ
keep_blank_values: flag indicating whether blank values in
percent-encoded forms should be treated as blank strings.
A true value indicates that blanks should be retained as
blank strings. The default false value indicates that
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not included.
strict_parsing: flag indicating what to do with parsing errors.
If false (the default), errors are silently ignored.
If true, errors raise a ValueError exception.
limit : used internally to read parts of multipart/form-data forms,
to exit from the reading loop when reached. It is the difference
between the form content-length and the number of bytes already
read
encoding, errors : the encoding and error handler used to decode the
binary stream to strings. Must be the same as the charset defined
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max_num_fields: int. If set, then __init__ throws a ValueError
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that the file can still be used, but it can't be opened by
another process, and it will automatically be deleted when it
is closed or when the current process terminates.
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<LI>CONTENT_LENGTH
<LI>CONTENT_TYPE
<LI>DATE_GMT
<LI>DATE_LOCAL
<LI>DOCUMENT_NAME
<LI>DOCUMENT_ROOT
<LI>DOCUMENT_URI
<LI>GATEWAY_INTERFACE
<LI>LAST_MODIFIED
<LI>PATH
<LI>PATH_INFO
<LI>PATH_TRANSLATED
<LI>QUERY_STRING
<LI>REMOTE_ADDR
<LI>REMOTE_HOST
<LI>REMOTE_IDENT
<LI>REMOTE_USER
<LI>REQUEST_METHOD
<LI>SCRIPT_NAME
<LI>SERVER_NAME
<LI>SERVER_PORT
<LI>SERVER_PROTOCOL
<LI>SERVER_ROOT
<LI>SERVER_SOFTWARE
</UL>
In addition, HTTP headers sent by the server may be passed in the
environment as well. Here are some common variable names:
<UL>
<LI>HTTP_ACCEPT
<LI>HTTP_CONNECTION
<LI>HTTP_HOST
<LI>HTTP_PRAGMA
<LI>HTTP_REFERER
<LI>HTTP_USER_AGENT
</UL>
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Stuff to parse WAVE files.
Usage.
Reading WAVE files:
f = wave.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
When the setpos() and rewind() methods are not used, the seek()
method is not necessary.
This returns an instance of a class with the following public methods:
getnchannels() -- returns number of audio channels (1 for
mono, 2 for stereo)
getsampwidth() -- returns sample width in bytes
getframerate() -- returns sampling frequency
getnframes() -- returns number of audio frames
getcomptype() -- returns compression type ('NONE' for linear samples)
getcompname() -- returns human-readable version of
compression type ('not compressed' linear samples)
getparams() -- returns a namedtuple consisting of all of the
above in the above order
getmarkers() -- returns None (for compatibility with the
aifc module)
getmark(id) -- raises an error since the mark does not
exist (for compatibility with the aifc module)
readframes(n) -- returns at most n frames of audio
rewind() -- rewind to the beginning of the audio stream
setpos(pos) -- seek to the specified position
tell() -- return the current position
close() -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
is destroyed.
Writing WAVE files:
f = wave.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().
This returns an instance of a class with the following public methods:
setnchannels(n) -- set the number of channels
setsampwidth(n) -- set the sample width
setframerate(n) -- set the frame rate
setnframes(n) -- set the number of frames
setcomptype(type, name)
-- set the compression type and the
human-readable compression type
setparams(tuple)
-- set all parameters at once
tell() -- return current position in output file
writeframesraw(data)
-- write audio frames without patching up the
file header
writeframes(data)
-- write audio frames and patch up the file header
close() -- patch up the file header and close the
output file
You should set the parameters before the first writeframesraw or
writeframes. The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
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_nchannels -- the number of audio channels
available through the getnchannels() method
_nframes -- the number of audio frames
available through the getnframes() method
_sampwidth -- the number of bytes per audio sample
available through the getsampwidth() method
_framerate -- the sampling frequency
available through the getframerate() method
_comptype -- the AIFF-C compression type ('NONE' if AIFF)
available through the getcomptype() method
_compname -- the human-readable AIFF-C compression type
available through the getcomptype() method
_soundpos -- the position in the audio stream
available through the tell() method, set through the
setpos() method
These variables are used internally only:
_fmt_chunk_read -- 1 iff the FMT chunk has been read
_data_seek_needed -- 1 iff positioned correctly in audio
file for readframes()
_data_chunk -- instantiation of a chunk class for the DATA chunk
_framesize -- size of one frame in the file
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set through the setcomptype() or setparams() method
_compname -- the human-readable AIFF-C compression type
set through the setcomptype() or setparams() method
_nchannels -- the number of audio channels
set through the setnchannels() or setparams() method
_sampwidth -- the number of bytes per audio sample
set through the setsampwidth() or setparams() method
_framerate -- the sampling frequency
set through the setframerate() or setparams() method
_nframes -- the number of audio frames written to the header
set through the setnframes() or setparams() method
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_datalength -- the size of the audio samples written to the header
_nframeswritten -- the number of frames actually written
_datawritten -- the size of the audio samples actually written
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without blocking; the thread must release it once for each time it has
acquired it.
N)�_CRLock�_PyRLock)�args�kwargsr" r" r# r Q s
c @ sV e Zd ZdZdd� Zdd� Zddd �ZeZd
d � Zd d
� Z dd� Z
dd� Z dd� Z dS )�_RLocka, This class implements reentrant lock objects.
A reentrant lock must be released by the thread that acquired it. Once a
thread has acquired a reentrant lock, the same thread may acquire it
again without blocking; the thread must release it once for each time it
has acquired it.
c C s t � | _d | _d| _d S �Nr )�_allocate_lock�_block�_owner�_count��selfr" r" r# �__init__h s z_RLock.__init__c C s^ | j }zt| j}W n tk
r( Y nX d| j�� r:dnd| jj| jj|| j t
t | ��f S )Nz)<%s %s.%s object owner=%r count=%d at %s>�lockedZunlocked) r- �_active�name�KeyErrorr, r2 � __class__�
__module__� __qualname__r. �hex�id)r0 �ownerr" r" r# �__repr__m s
�z_RLock.__repr__T���c C sD t � }| j|kr"| jd7 _dS | j�||�}|r@|| _d| _|S )a Acquire a lock, blocking or non-blocking.
When invoked without arguments: if this thread already owns the lock,
increment the recursion level by one, and return immediately. Otherwise,
if another thread owns the lock, block until the lock is unlocked. Once
the lock is unlocked (not owned by any thread), then grab ownership, set
the recursion level to one, and return. If more than one thread is
blocked waiting until the lock is unlocked, only one at a time will be
able to grab ownership of the lock. There is no return value in this
case.
When invoked with the blocking argument set to true, do the same thing
as when called without arguments, and return true.
When invoked with the blocking argument set to false, do not block. If a
call without an argument would block, return false immediately;
otherwise, do the same thing as when called without arguments, and
return true.
When invoked with the floating-point timeout argument set to a positive
value, block for at most the number of seconds specified by timeout
and as long as the lock cannot be acquired. Return true if the lock has
been acquired, false if the timeout has elapsed.
� )r r- r. r, �acquire)r0 �blocking�timeout�me�rcr" r" r# r? | s
z_RLock.acquirec C s< | j t� krtd��| jd | _}|s8d| _ | j�� dS )am Release a lock, decrementing the recursion level.
If after the decrement it is zero, reset the lock to unlocked (not owned
by any thread), and if any other threads are blocked waiting for the
lock to become unlocked, allow exactly one of them to proceed. If after
the decrement the recursion level is still nonzero, the lock remains
locked and owned by the calling thread.
Only call this method when the calling thread owns the lock. A
RuntimeError is raised if this method is called when the lock is
unlocked.
There is no return value.
� cannot release un-acquired lockr> N)r- r � RuntimeErrorr. r, �release)r0 r r" r" r# rF � s z_RLock.releasec C s | � � d S �N�rF �r0 �t�v�tbr" r" r# �__exit__� s z_RLock.__exit__c C s | j �� |\| _| _d S rG )r, r? r. r- )r0 �stater" r" r# �_acquire_restore� s
z_RLock._acquire_restorec C s< | j dkrtd��| j }d| _ | j}d | _| j�� ||fS )Nr rD )r. rE r- r, rF )r0 r r; r" r" r# �
_release_save� s
z_RLock._release_savec C s | j t� kS rG )r- r r/ r" r" r# � _is_owned� s z_RLock._is_ownedN)Tr= )
�__name__r7 r8 �__doc__r1 r< r? � __enter__rF rM rO rP rQ r" r" r" r# r) ^ s
$
r) c @ st e Zd ZdZddd�Zdd� Zdd� Zd d
� Zd d � Zd
d� Z dd� Z
ddd�Z d dd�Z d dd�Z
dd� ZeZdS ) r aj Class that implements a condition variable.
A condition variable allows one or more threads to wait until they are
notified by another thread.
If the lock argument is given and not None, it must be a Lock or RLock
object, and it is used as the underlying lock. Otherwise, a new RLock object
is created and used as the underlying lock.
Nc C s� |d krt � }|| _|j| _|j| _z |j| _W n tk
rD Y nX z |j| _W n tk
rf Y nX z |j| _W n tk
r� Y nX t� | _ d S rG )
r �_lockr? rF rP �AttributeErrorrO rQ �_deque�_waiters�r0 �lockr" r" r# r1 � s$ zCondition.__init__c C s
| j �� S rG )rU rT r/ r" r" r# rT � s zCondition.__enter__c G s | j j|� S rG )rU rM )r0 r' r" r" r# rM � s zCondition.__exit__c C s d| j t| j�f S )Nz<Condition(%s, %d)>)rU �lenrX r/ r" r" r# r< � s zCondition.__repr__c C s | j �� d S rG )rU rF r/ r" r" r# rP � s zCondition._release_savec C s | j �� d S rG )rU r? )r0 �xr" r" r# rO s zCondition._acquire_restorec C s" | j �d�r| j �� dS dS d S )Nr FT)rU r? rF r/ r" r" r# rQ s
zCondition._is_ownedc C s� | � � std��t� }|�� | j�|� | �� }d}z>|dkrN|�� d}n |dkrd|�d|�}n
|�d�}|W �S | �|� |s�z| j�|� W n t k
r� Y nX X dS )ak Wait until notified or until a timeout occurs.
If the calling thread has not acquired the lock when this method is
called, a RuntimeError is raised.
This method releases the underlying lock, and then blocks until it is
awakened by a notify() or notify_all() call for the same condition
variable in another thread, or until the optional timeout occurs. Once
awakened or timed out, it re-acquires the lock and returns.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
When the underlying lock is an RLock, it is not released using its
release() method, since this may not actually unlock the lock when it
was acquired multiple times recursively. Instead, an internal interface
of the RLock class is used, which really unlocks it even when it has
been recursively acquired several times. Another internal interface is
then used to restore the recursion level when the lock is reacquired.
z cannot wait on un-acquired lockFNTr )
rQ rE r+ r? rX �appendrP rO �remove�
ValueError)r0 rA �waiterZ saved_stateZgotitr" r" r# �wait s*
zCondition.waitc C sX d}|}|� }|sT|dk rB|dkr.t � | }n|t � }|dkrBqT| �|� |� }q|S )z�Wait until a condition evaluates to True.
predicate should be a callable which result will be interpreted as a
boolean value. A timeout may be provided giving the maximum time to
wait.
Nr )�_timera )r0 Z predicaterA �endtimeZwaittime�resultr" r" r# �wait_for> s
zCondition.wait_forr> c C sf | � � std��| j}tt||��}|s,dS |D ]0}|�� z|�|� W q0 tk
r^ Y q0X q0dS )aK Wake up one or more threads waiting on this condition, if any.
If the calling thread has not acquired the lock when this method is
called, a RuntimeError is raised.
This method wakes up at most n of the threads waiting for the condition
variable; it is a no-op if no threads are waiting.
z!cannot notify on un-acquired lockN)rQ rE rX rW �_islicerF r^ r_ )r0 �nZ all_waitersZwaiters_to_notifyr` r" r" r# �notifyU s
zCondition.notifyc C s | � t| j�� dS )z�Wake up all threads waiting on this condition.
If the calling thread has not acquired the lock when this method
is called, a RuntimeError is raised.
N)rh r[ rX r/ r" r" r# �
notify_alll s zCondition.notify_all)N)N)N)r> )rR r7 r8 rS r1 rT rM r< rP rO rQ ra re rh ri Z notifyAllr" r" r" r# r � s
0
c @ s8 e Zd ZdZd
dd�Zddd�ZeZd d
� Zd d � ZdS )r aG This class implements semaphore objects.
Semaphores manage a counter representing the number of release() calls minus
the number of acquire() calls, plus an initial value. The acquire() method
blocks if necessary until it can return without making the counter
negative. If not given, value defaults to 1.
r> c C s& |dk rt d��tt� �| _|| _d S )Nr z$semaphore initial value must be >= 0)r_ r r �_cond�_value�r0 �valuer" r" r# r1 � s zSemaphore.__init__TNc C s� |s|dk rt d��d}d}| j�f | jdkrr|s4q�|dk rd|dkrPt� | }n|t� }|dkrdq�| j�|� q$| jd8 _d}W 5 Q R X |S )a� Acquire a semaphore, decrementing the internal counter by one.
When invoked without arguments: if the internal counter is larger than
zero on entry, decrement it by one and return immediately. If it is zero
on entry, block, waiting until some other thread has called release() to
make it larger than zero. This is done with proper interlocking so that
if multiple acquire() calls are blocked, release() will wake exactly one
of them up. The implementation may pick one at random, so the order in
which blocked threads are awakened should not be relied on. There is no
return value in this case.
When invoked with blocking set to true, do the same thing as when called
without arguments, and return true.
When invoked with blocking set to false, do not block. If a call without
an argument would block, return false immediately; otherwise, do the
same thing as when called without arguments, and return true.
When invoked with a timeout other than None, it will block for at
most timeout seconds. If acquire does not complete successfully in
that interval, return false. Return true otherwise.
Nz.can't specify timeout for non-blocking acquireFr r> T)r_ rj rk rb ra )r0 r@ rA rC rc r" r" r# r? � s$
zSemaphore.acquirec C s. | j � | jd7 _| j �� W 5 Q R X dS )z�Release a semaphore, incrementing the internal counter by one.
When the counter is zero on entry and another thread is waiting for it
to become larger than zero again, wake up that thread.
r> N)rj rk rh r/ r" r" r# rF � s zSemaphore.releasec C s | � � d S rG rH rI r" r" r# rM � s zSemaphore.__exit__)r> )TN) rR r7 r8 rS r1 r? rT rF rM r" r" r" r# r x s
- c @ s" e Zd ZdZddd�Zdd� ZdS ) r a� Implements a bounded semaphore.
A bounded semaphore checks to make sure its current value doesn't exceed its
initial value. If it does, ValueError is raised. In most situations
semaphores are used to guard resources with limited capacity.
If the semaphore is released too many times it's a sign of a bug. If not
given, value defaults to 1.
Like regular semaphores, bounded semaphores manage a counter representing
the number of release() calls minus the number of acquire() calls, plus an
initial value. The acquire() method blocks if necessary until it can return
without making the counter negative. If not given, value defaults to 1.
r> c C s t �| |� || _d S rG )r r1 �_initial_valuerl r" r" r# r1 � s zBoundedSemaphore.__init__c C sB | j �2 | j| jkr td��| jd7 _| j �� W 5 Q R X dS )a6 Release a semaphore, incrementing the internal counter by one.
When the counter is zero on entry and another thread is waiting for it
to become larger than zero again, wake up that thread.
If the number of releases exceeds the number of acquires,
raise a ValueError.
z!Semaphore released too many timesr> N)rj rk rn r_ rh r/ r" r" r# rF � s
zBoundedSemaphore.releaseN)r> )rR r7 r8 rS r1 rF r" r" r" r# r � s
c @ sF e Zd ZdZdd� Zdd� Zdd� ZeZdd � Zd
d � Z dd
d�Z
d S )r z�Class implementing event objects.
Events manage a flag that can be set to true with the set() method and reset
to false with the clear() method. The wait() method blocks until the flag is
true. The flag is initially false.
c C s t t� �| _d| _d S )NF)r r rj �_flagr/ r" r" r# r1 � s zEvent.__init__c C s | j �t� � d S rG )rj r1 r r/ r" r" r# �_reset_internal_locks� s zEvent._reset_internal_locksc C s | j S )z5Return true if and only if the internal flag is true.)ro r/ r" r" r# �is_set s z Event.is_setc C s& | j � d| _| j �� W 5 Q R X dS )z�Set the internal flag to true.
All threads waiting for it to become true are awakened. Threads
that call wait() once the flag is true will not block at all.
TN)rj ro ri r/ r" r" r# �set s z Event.setc C s | j � d| _W 5 Q R X dS )z�Reset the internal flag to false.
Subsequently, threads calling wait() will block until set() is called to
set the internal flag to true again.
FN)rj ro r/ r" r" r# �clear s z Event.clearNc
C s8 | j �( | j}|s | j �|�}|W 5 Q R � S Q R X dS )aH Block until the internal flag is true.
If the internal flag is true on entry, return immediately. Otherwise,
block until another thread calls set() to set the flag to true, or until
the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof).
This method returns the internal flag on exit, so it will always return
True except if a timeout is given and the operation times out.
N)rj ro ra )r0 rA Zsignaledr" r" r# ra s
z
Event.wait)N) rR r7 r8 rS r1 rp rq ZisSetrr rs ra r" r" r" r# r � s
c @ s� e Zd ZdZddd�Zd dd�Zdd� Zd d
� Zd d � Zd
d� Z dd� Z
dd� Z dd� Z e
dd� �Ze
dd� �Ze
dd� �ZdS ) r z�Implements a Barrier.
Useful for synchronizing a fixed number of threads at known synchronization
points. Threads block on 'wait()' and are simultaneously awoken once they
have all made that call.
Nc C s. t t� �| _|| _|| _|| _d| _d| _dS )aW Create a barrier, initialised to 'parties' threads.
'action' is a callable which, when supplied, will be called by one of
the threads after they have all entered the barrier and just prior to
releasing them all. If a 'timeout' is provided, it is used as the
default for all subsequent 'wait()' calls.
r N)r r rj �_action�_timeout�_parties�_stater. )r0 �parties�actionrA r" r" r# r1 F s zBarrier.__init__c
C s� |dkr| j }| j�r | �� | j}| jd7 _z6|d | jkrL| �� n
| �|� |W �W 5 Q R � S | jd8 _| �� X W 5 Q R X dS )aN Wait for the barrier.
When the specified number of threads have started waiting, they are all
simultaneously awoken. If an 'action' was provided for the barrier, one
of the threads will have executed that callback prior to returning.
Returns an individual index number from 0 to 'parties-1'.
Nr> )ru rj �_enterr. �_exitrv �_release�_wait)r0 rA �indexr" r" r# ra V s
z Barrier.waitc C s( | j dkr| j�� q | j dk r$t�d S )N�r= r> r )rw rj ra r r/ r" r" r# rz t s
zBarrier._enterc C s> z"| j r| � � d| _| j�� W n | �� � Y nX d S )Nr> )rt rw rj ri �_breakr/ r" r" r# r| s zBarrier._releasec s4 � j �� fdd�|�s"� �� t�� jdk r0t�d S )Nc s
� j dkS r* �rw r" r/ r" r# �<lambda>� � z Barrier._wait.<locals>.<lambda>r )rj re r� r rw �r0 rA r" r/ r# r} � s
z
Barrier._waitc C s( | j dkr$| jdkr$d| _| j�� d S )Nr r )r. rw rj ri r/ r" r" r# r{ � s
z
Barrier._exitc C sT | j �D | jdkr6| jdkr$d| _q<| jdkr<d| _nd| _| j �� W 5 Q R X dS )z�Reset the barrier to the initial state.
Any threads currently waiting will get the BrokenBarrier exception
raised.
r r= ���N)rj r. rw ri r/ r" r" r# �reset� s
z
Barrier.resetc C s | j � | �� W 5 Q R X dS )z�Place the barrier into a 'broken' state.
Useful in case of error. Any currently waiting threads and threads
attempting to 'wait()' will have BrokenBarrierError raised.
N)rj r� r/ r" r" r# �abort� s z
Barrier.abortc C s d| _ | j�� d S )Nr� )rw rj ri r/ r" r" r# r� � s zBarrier._breakc C s | j S )z:Return the number of threads required to trip the barrier.)rv r/ r" r" r# rx � s zBarrier.partiesc C s | j dkr| jS dS )z>Return the number of threads currently waiting at the barrier.r )rw r. r/ r" r" r# � n_waiting� s
zBarrier.n_waitingc C s
| j dkS )z0Return True if the barrier is in a broken state.r� r� r/ r" r" r# �broken� s zBarrier.broken)NN)N)rR r7 r8 rS r1 ra rz r| r} r{ r� r� r� �propertyrx r� r� r" r" r" r# r = s
c @ s e Zd ZdS )r N)rR r7 r8 r" r" r" r# r � s � Thread-%dc C s
| t � S rG )�_counter)�templater" r" r# �_newname� s r� c @ s e Zd ZdZdZd:dd�dd�Zdd � Zd
d � Zd d
� Zdd� Z dd� Z
dd� Z e r\dd� Z
dd� Zdd� Zdd� Zd d � Zd;d d �Zd<d"d#�Zed$d%� �Zejd&d%� �Zed'd(� �Ze r�ed)d*� �Zd+d,� Zd-d.� Zed/d0� �Zejd1d0� �Zd2d3� Z d4d5� Z d6d7� Z d8d9� Z dS )=r a A class that represents a thread of control.
This class can be safely subclassed in a limited fashion. There are two ways
to specify the activity: by passing a callable object to the constructor, or
by overriding the run() method in a subclass.
FNr" ��daemonc C s� |dkr i }|| _ t|p t� �| _|| _|| _|dk r>|| _n
t� j| _d| _ t
rXd| _ d| _ t
� | _d| _d| _tj| _t� | _t�| � dS )aK This constructor should always be called with keyword arguments. Arguments are:
*group* should be None; reserved for future extension when a ThreadGroup
class is implemented.
*target* is the callable object to be invoked by the run()
method. Defaults to None, meaning nothing is called.
*name* is the thread name. By default, a unique name is constructed of
the form "Thread-N" where N is a small decimal number.
*args* is the argument tuple for the target invocation. Defaults to ().
*kwargs* is a dictionary of keyword arguments for the target
invocation. Defaults to {}.
If a subclass overrides the constructor, it must make sure to invoke
the base class constructor (Thread.__init__()) before doing anything
else to the thread.
NFT)�_target�strr� �_name�_args�_kwargs� _daemonicr
r� �_ident�_HAVE_THREAD_NATIVE_ID�
_native_id� _tstate_lockr �_started� _is_stopped� _initialized�_sys�stderr�_stderr�_make_invoke_excepthook�_invoke_excepthook� _dangling�add)r0 �group�targetr4 r' r( r� r" r" r# r1 � s&
zThread.__init__c C s( | j �� |r| �� n d| _d | _d S �NT)r� rp �_set_tstate_lockr� r� )r0 �is_aliver" r" r# rp ( s
z Thread._reset_internal_locksc C s^ d}| j �� rd}| �� | jr$d}| jr2|d7 }| jd k rJ|d| j 7 }d| jj| j|f S )N�initialZstartedZstoppedz daemonz %sz <%s(%s, %s)>) r� rq r� r� r� r� r6 rR r� )r0 Zstatusr" r" r# r< 4 s
zThread.__repr__c C s� | j std��| j�� r td��t� | t| < W 5 Q R X zt| jd� W n, tk
rt t� t| = W 5 Q R X � Y nX | j� � dS )a- Start the thread's activity.
It must be called at most once per thread object. It arranges for the
object's run() method to be invoked in a separate thread of control.
This method will raise a RuntimeError if called more than once on the
same thread object.
z thread.__init__() not calledz threads can only be started oncer" N)
r� rE r� rq �_active_limbo_lock�_limbo�_start_new_thread�
_bootstrap� Exceptionra r/ r" r" r# �startB s
z Thread.startc C s. z| j r| j | j| j� W 5 | ` | `| `X dS )aX Method representing the thread's activity.
You may override this method in a subclass. The standard run() method
invokes the callable object passed to the object's constructor as the
target argument, if any, with sequential and keyword arguments taken
from the args and kwargs arguments, respectively.
N)r� r� r� r/ r" r" r# �run[ s z
Thread.runc C s4 z | � � W n" | jr(td kr(Y d S � Y nX d S rG )�_bootstrap_innerr� r� r/ r" r" r# r� l s
zThread._bootstrapc C s t � | _d S rG )r r� r/ r" r" r# �
_set_ident� s zThread._set_identc C s t � | _d S rG )r r� r/ r" r" r# �_set_native_id� s zThread._set_native_idc C s8 t � | _| j�� | js4t� t�| j� W 5 Q R X dS )z�
Set a lock object which will be released by the interpreter when
the underlying thread state (see pystate.h) gets deleted.
N)�
_set_sentinelr� r? r� �_shutdown_locks_lock�_shutdown_locksr� r/ r" r" r# r� � s
zThread._set_tstate_lockc C s� z�| �� | �� tr | �� | j�� t � | t| j < t
| = W 5 Q R X t rVt �
t � trdt �t� z | �� W n | �| � Y nX W 5 t � z tt� = W n Y nX W 5 Q R X X d S rG )r� r3 r r� r� r� r� r� rr r� r� r$ r� r r r r� r� r/ r" r" r# r� � s,
zThread._bootstrap_innerc C s> | j }|d k rd| _d | _ | js:t� t�|� W 5 Q R X d S r� )r� r� r� r� r� �discardrY r" r" r# �_stop� s z Thread._stopc C s t � tt� = W 5 Q R X dS )zARemove current thread from the dict of currently running threads.N)r� r3 r r/ r" r" r# �_delete� s zThread._deletec C sZ | j std��| j�� s td��| t� kr2td��|dkrD| �� n| jt|d�d� dS )a Wait until the thread terminates.
This blocks the calling thread until the thread whose join() method is
called terminates -- either normally or through an unhandled exception
or until the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof). As join() always returns None, you must call
is_alive() after join() to decide whether a timeout happened -- if the
thread is still alive, the join() call timed out.
When the timeout argument is not present or None, the operation will
block until the thread terminates.
A thread can be join()ed many times.
join() raises a RuntimeError if an attempt is made to join the current
thread as that would cause a deadlock. It is also an error to join() a
thread before it has been started and attempts to do so raises the same
exception.
� Thread.__init__() not calledz'cannot join thread before it is startedzcannot join current threadNr )rA )r� rE r� rq r
�_wait_for_tstate_lock�maxr� r" r" r# �join� s
z Thread.joinTr= c C s0 | j }|d krn |�||�r,|�� | �� d S rG )r� r? rF r� )r0 �blockrA rZ r" r" r# r� � s z Thread._wait_for_tstate_lockc C s | j S )z�A string used for identification purposes only.
It has no semantics. Multiple threads may be given the same name. The
initial name is set by the constructor.
)r� r/ r" r" r# r4 s z Thread.namec C s t |�| _d S rG )r� r� �r0 r4 r" r" r# r4 s c C s | j S )a4 Thread identifier of this thread or None if it has not been started.
This is a nonzero integer. See the get_ident() function. Thread
identifiers may be recycled when a thread exits and another thread is
created. The identifier is available even after the thread has exited.
)r� r/ r" r" r# �ident s
z Thread.identc C s | j S )z�Native integral thread ID of this thread, or None if it has not been started.
This is a non-negative integer. See the get_native_id() function.
This represents the Thread ID as reported by the kernel.
)r� r/ r" r" r# � native_id$ s zThread.native_idc C s& | j s| j�� sdS | �d� | j S )z�Return whether the thread is alive.
This method returns True just before the run() method starts until just
after the run() method terminates. The module function enumerate()
returns a list of all alive threads.
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zThread.is_alivec C s ddl }|jdtdd� | �� S )zhReturn whether the thread is alive.
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( 5 difflib.cpython-38.pyc 0000644 00000164060 15033571650 0010607 0 ustar 00 U
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Module difflib -- helpers for computing deltas between objects.
Function get_close_matches(word, possibilities, n=3, cutoff=0.6):
Use SequenceMatcher to return list of the best "good enough" matches.
Function context_diff(a, b):
For two lists of strings, return a delta in context diff format.
Function ndiff(a, b):
Return a delta: the difference between `a` and `b` (lists of strings).
Function restore(delta, which):
Return one of the two sequences that generated an ndiff delta.
Function unified_diff(a, b):
For two lists of strings, return a delta in unified diff format.
Class SequenceMatcher:
A flexible class for comparing pairs of sequences of any type.
Class Differ:
For producing human-readable deltas from sequences of lines of text.
Class HtmlDiff:
For producing HTML side by side comparison with change highlights.
�get_close_matches�ndiff�restore�SequenceMatcher�Differ�IS_CHARACTER_JUNK� IS_LINE_JUNK� context_diff� unified_diff�
diff_bytes�HtmlDiff�Match� )�nlargest)�
namedtupleza b sizec C s |rd| | S dS )Ng @� �?� )�matches�lengthr r � /usr/lib64/python3.8/difflib.py�_calculate_ratio& s r c @ st e Zd ZdZd dd�Zdd� Zd d
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SequenceMatcher is a flexible class for comparing pairs of sequences of
any type, so long as the sequence elements are hashable. The basic
algorithm predates, and is a little fancier than, an algorithm
published in the late 1980's by Ratcliff and Obershelp under the
hyperbolic name "gestalt pattern matching". The basic idea is to find
the longest contiguous matching subsequence that contains no "junk"
elements (R-O doesn't address junk). The same idea is then applied
recursively to the pieces of the sequences to the left and to the right
of the matching subsequence. This does not yield minimal edit
sequences, but does tend to yield matches that "look right" to people.
SequenceMatcher tries to compute a "human-friendly diff" between two
sequences. Unlike e.g. UNIX(tm) diff, the fundamental notion is the
longest *contiguous* & junk-free matching subsequence. That's what
catches peoples' eyes. The Windows(tm) windiff has another interesting
notion, pairing up elements that appear uniquely in each sequence.
That, and the method here, appear to yield more intuitive difference
reports than does diff. This method appears to be the least vulnerable
to synching up on blocks of "junk lines", though (like blank lines in
ordinary text files, or maybe "<P>" lines in HTML files). That may be
because this is the only method of the 3 that has a *concept* of
"junk" <wink>.
Example, comparing two strings, and considering blanks to be "junk":
>>> s = SequenceMatcher(lambda x: x == " ",
... "private Thread currentThread;",
... "private volatile Thread currentThread;")
>>>
.ratio() returns a float in [0, 1], measuring the "similarity" of the
sequences. As a rule of thumb, a .ratio() value over 0.6 means the
sequences are close matches:
>>> print(round(s.ratio(), 3))
0.866
>>>
If you're only interested in where the sequences match,
.get_matching_blocks() is handy:
>>> for block in s.get_matching_blocks():
... print("a[%d] and b[%d] match for %d elements" % block)
a[0] and b[0] match for 8 elements
a[8] and b[17] match for 21 elements
a[29] and b[38] match for 0 elements
Note that the last tuple returned by .get_matching_blocks() is always a
dummy, (len(a), len(b), 0), and this is the only case in which the last
tuple element (number of elements matched) is 0.
If you want to know how to change the first sequence into the second,
use .get_opcodes():
>>> for opcode in s.get_opcodes():
... print("%6s a[%d:%d] b[%d:%d]" % opcode)
equal a[0:8] b[0:8]
insert a[8:8] b[8:17]
equal a[8:29] b[17:38]
See the Differ class for a fancy human-friendly file differencer, which
uses SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
See also function get_close_matches() in this module, which shows how
simple code building on SequenceMatcher can be used to do useful work.
Timing: Basic R-O is cubic time worst case and quadratic time expected
case. SequenceMatcher is quadratic time for the worst case and has
expected-case behavior dependent in a complicated way on how many
elements the sequences have in common; best case time is linear.
Methods:
__init__(isjunk=None, a='', b='')
Construct a SequenceMatcher.
set_seqs(a, b)
Set the two sequences to be compared.
set_seq1(a)
Set the first sequence to be compared.
set_seq2(b)
Set the second sequence to be compared.
find_longest_match(alo, ahi, blo, bhi)
Find longest matching block in a[alo:ahi] and b[blo:bhi].
get_matching_blocks()
Return list of triples describing matching subsequences.
get_opcodes()
Return list of 5-tuples describing how to turn a into b.
ratio()
Return a measure of the sequences' similarity (float in [0,1]).
quick_ratio()
Return an upper bound on .ratio() relatively quickly.
real_quick_ratio()
Return an upper bound on ratio() very quickly.
N� Tc C s( || _ d | _| _|| _| �||� dS )a! Construct a SequenceMatcher.
Optional arg isjunk is None (the default), or a one-argument
function that takes a sequence element and returns true iff the
element is junk. None is equivalent to passing "lambda x: 0", i.e.
no elements are considered to be junk. For example, pass
lambda x: x in " \t"
if you're comparing lines as sequences of characters, and don't
want to synch up on blanks or hard tabs.
Optional arg a is the first of two sequences to be compared. By
default, an empty string. The elements of a must be hashable. See
also .set_seqs() and .set_seq1().
Optional arg b is the second of two sequences to be compared. By
default, an empty string. The elements of b must be hashable. See
also .set_seqs() and .set_seq2().
Optional arg autojunk should be set to False to disable the
"automatic junk heuristic" that treats popular elements as junk
(see module documentation for more information).
N)�isjunk�a�b�autojunk�set_seqs)�selfr r r r r r r �__init__� s ; zSequenceMatcher.__init__c C s | � |� | �|� dS )z�Set the two sequences to be compared.
>>> s = SequenceMatcher()
>>> s.set_seqs("abcd", "bcde")
>>> s.ratio()
0.75
N)�set_seq1�set_seq2)r r r r r r r � s
zSequenceMatcher.set_seqsc C s$ || j krdS || _ d | _| _dS )aM Set the first sequence to be compared.
The second sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq1("bcde")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq2().
N)r �matching_blocks�opcodes)r r r r r r � s
zSequenceMatcher.set_seq1c C s2 || j krdS || _ d | _| _d| _| �� dS )aM Set the second sequence to be compared.
The first sequence to be compared is not changed.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.set_seq2("abcd")
>>> s.ratio()
1.0
>>>
SequenceMatcher computes and caches detailed information about the
second sequence, so if you want to compare one sequence S against
many sequences, use .set_seq2(S) once and call .set_seq1(x)
repeatedly for each of the other sequences.
See also set_seqs() and set_seq1().
N)r r r! �
fullbcount�_SequenceMatcher__chain_b)r r r r r r � s
zSequenceMatcher.set_seq2c C s� | j }i | _}t|�D ] \}}|�|g �}|�|� qt� | _}| j}|r~|�� D ]}||�rV|� |� qV|D ]
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}||= q�d S )N�� �d � )r �b2j� enumerate�
setdefault�append�set�bjunkr �keys�addZbpopular�lenr �items) r r r' �i�elt�indicesZjunkr Zpopular�nZntestZidxsr r r Z __chain_b) s,
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} i } g }
t||�D ]�}| j}i }|�|| |
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} q^|} q@| |k�r |
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} q�| | |k �rt|
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| k�r(| d } �q�t| |
| �S )a� Find longest matching block in a[alo:ahi] and b[blo:bhi].
If isjunk is not defined:
Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
alo <= i <= i+k <= ahi
blo <= j <= j+k <= bhi
and for all (i',j',k') meeting those conditions,
k >= k'
i <= i'
and if i == i', j <= j'
In other words, of all maximal matching blocks, return one that
starts earliest in a, and of all those maximal matching blocks that
start earliest in a, return the one that starts earliest in b.
>>> s = SequenceMatcher(None, " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=0, b=4, size=5)
If isjunk is defined, first the longest matching block is
determined as above, but with the additional restriction that no
junk element appears in the block. Then that block is extended as
far as possible by matching (only) junk elements on both sides. So
the resulting block never matches on junk except as identical junk
happens to be adjacent to an "interesting" match.
Here's the same example as before, but considering blanks to be
junk. That prevents " abcd" from matching the " abcd" at the tail
end of the second sequence directly. Instead only the "abcd" can
match, and matches the leftmost "abcd" in the second sequence:
>>> s = SequenceMatcher(lambda x: x==" ", " abcd", "abcd abcd")
>>> s.find_longest_match(0, 5, 0, 9)
Match(a=1, b=0, size=4)
If no blocks match, return (alo, blo, 0).
>>> s = SequenceMatcher(None, "ab", "c")
>>> s.find_longest_match(0, 2, 0, 1)
Match(a=0, b=0, size=0)
r
r& )r r r' r, � __contains__�range�getr )r �alo�ahi�blo�bhir r r' ZisbjunkZbestiZbestjZbestsizeZj2lenZnothingr1 Zj2lengetZnewj2len�j�kr r r �find_longest_matchP sR 8 "�� �� �� �� z"SequenceMatcher.find_longest_matchc C s| | j dk r| j S t| j�t| j� }}d|d|fg}g }|r�|�� \}}}}| �||||� \} }
} } | r8|�| � || k r�||
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j |��| _ | j S )a Return list of triples describing matching subsequences.
Each triple is of the form (i, j, n), and means that
a[i:i+n] == b[j:j+n]. The triples are monotonically increasing in
i and in j. New in Python 2.5, it's also guaranteed that if
(i, j, n) and (i', j', n') are adjacent triples in the list, and
the second is not the last triple in the list, then i+n != i' or
j+n != j'. IOW, adjacent triples never describe adjacent equal
blocks.
The last triple is a dummy, (len(a), len(b), 0), and is the only
triple with n==0.
>>> s = SequenceMatcher(None, "abxcd", "abcd")
>>> list(s.get_matching_blocks())
[Match(a=0, b=0, size=2), Match(a=3, b=2, size=2), Match(a=5, b=4, size=0)]
Nr
) r r/ r r �popr> r* �sort�list�mapr �_make)r �la�lbZqueuer r8 r9 r: r; r1 r< r= �x�i1�j1Zk1Z non_adjacent�i2�j2Zk2r r r �get_matching_blocks� s8
z#SequenceMatcher.get_matching_blocksc C s� | j dk r| j S d }}g | _ }| �� D ]�\}}}d}||k rN||k rNd}n||k r\d}n ||k rhd}|r�|�|||||f� || || }}|r*|�d||||f� q*|S )a[ Return list of 5-tuples describing how to turn a into b.
Each tuple is of the form (tag, i1, i2, j1, j2). The first tuple
has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
tuple preceding it, and likewise for j1 == the previous j2.
The tags are strings, with these meanings:
'replace': a[i1:i2] should be replaced by b[j1:j2]
'delete': a[i1:i2] should be deleted.
Note that j1==j2 in this case.
'insert': b[j1:j2] should be inserted at a[i1:i1].
Note that i1==i2 in this case.
'equal': a[i1:i2] == b[j1:j2]
>>> a = "qabxcd"
>>> b = "abycdf"
>>> s = SequenceMatcher(None, a, b)
>>> for tag, i1, i2, j1, j2 in s.get_opcodes():
... print(("%7s a[%d:%d] (%s) b[%d:%d] (%s)" %
... (tag, i1, i2, a[i1:i2], j1, j2, b[j1:j2])))
delete a[0:1] (q) b[0:0] ()
equal a[1:3] (ab) b[0:2] (ab)
replace a[3:4] (x) b[2:3] (y)
equal a[4:6] (cd) b[3:5] (cd)
insert a[6:6] () b[5:6] (f)
Nr
r �replace�delete�insert�equal)r! rK r* )r r1 r< Zanswer�ai�bj�size�tagr r r � get_opcodes s$
zSequenceMatcher.get_opcodes� c
c sn | � � }|sdg}|d d dkrZ|d \}}}}}|t||| �|t||| �|f|d< |d d dkr�|d \}}}}}||t||| �|t||| �f|d< || }g } |D ]�\}}}}}|dk�r(|| |k�r(| �||t||| �|t||| �f� | V g } t||| �t||| � }}| �|||||f� q�| �rjt| �dk�rd| d d dk�sj| V dS )a� Isolate change clusters by eliminating ranges with no changes.
Return a generator of groups with up to n lines of context.
Each group is in the same format as returned by get_opcodes().
>>> from pprint import pprint
>>> a = list(map(str, range(1,40)))
>>> b = a[:]
>>> b[8:8] = ['i'] # Make an insertion
>>> b[20] += 'x' # Make a replacement
>>> b[23:28] = [] # Make a deletion
>>> b[30] += 'y' # Make another replacement
>>> pprint(list(SequenceMatcher(None,a,b).get_grouped_opcodes()))
[[('equal', 5, 8, 5, 8), ('insert', 8, 8, 8, 9), ('equal', 8, 11, 9, 12)],
[('equal', 16, 19, 17, 20),
('replace', 19, 20, 20, 21),
('equal', 20, 22, 21, 23),
('delete', 22, 27, 23, 23),
('equal', 27, 30, 23, 26)],
[('equal', 31, 34, 27, 30),
('replace', 34, 35, 30, 31),
('equal', 35, 38, 31, 34)]]
)rO r
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r& r
rO ���r& N)rT �max�minr* r/ )
r r4 ZcodesrS rG rI rH rJ Znn�groupr r r �get_grouped_opcodes< s( &&( &z#SequenceMatcher.get_grouped_opcodesc C s0 t dd� | �� D ��}t|t| j�t| j� �S )a� Return a measure of the sequences' similarity (float in [0,1]).
Where T is the total number of elements in both sequences, and
M is the number of matches, this is 2.0*M / T.
Note that this is 1 if the sequences are identical, and 0 if
they have nothing in common.
.ratio() is expensive to compute if you haven't already computed
.get_matching_blocks() or .get_opcodes(), in which case you may
want to try .quick_ratio() or .real_quick_ratio() first to get an
upper bound.
>>> s = SequenceMatcher(None, "abcd", "bcde")
>>> s.ratio()
0.75
>>> s.quick_ratio()
0.75
>>> s.real_quick_ratio()
1.0
c s s | ]}|d V qdS )rV Nr )�.0Ztripler r r � <genexpr>� s z(SequenceMatcher.ratio.<locals>.<genexpr>)�sumrK r r/ r r )r r r r r �ration s zSequenceMatcher.ratioc C s� | j dkr4i | _ }| jD ]}|�|d�d ||< q| j }i }|jd }}| jD ]>}||�rf|| }n |�|d�}|d ||< |dkrP|d }qPt|t| j�t| j� �S )z�Return an upper bound on ratio() relatively quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute.
Nr
r& )r" r r7 r5 r r r/ )r r" r2 ZavailZavailhasr Znumbr r r � quick_ratio� s
zSequenceMatcher.quick_ratioc C s* t | j�t | j� }}tt||�|| �S )z�Return an upper bound on ratio() very quickly.
This isn't defined beyond that it is an upper bound on .ratio(), and
is faster to compute than either .ratio() or .quick_ratio().
)r/ r r r rX )r rD rE r r r �real_quick_ratio� s z SequenceMatcher.real_quick_ratio)Nr r T)rU )�__name__�
__module__� __qualname__�__doc__r r r r r# r> rK rT rZ r^ r_ r` r r r r r + s j
@ ,'nG7
2 rU �333333�?c C s� |dkst d|f ��d| kr*dks:n t d|f ��g }t� }|�| � |D ]D}|�|� |�� |krR|�� |krR|�� |krR|�|�� |f� qRt||�}dd� |D �S )a� Use SequenceMatcher to return list of the best "good enough" matches.
word is a sequence for which close matches are desired (typically a
string).
possibilities is a list of sequences against which to match word
(typically a list of strings).
Optional arg n (default 3) is the maximum number of close matches to
return. n must be > 0.
Optional arg cutoff (default 0.6) is a float in [0, 1]. Possibilities
that don't score at least that similar to word are ignored.
The best (no more than n) matches among the possibilities are returned
in a list, sorted by similarity score, most similar first.
>>> get_close_matches("appel", ["ape", "apple", "peach", "puppy"])
['apple', 'ape']
>>> import keyword as _keyword
>>> get_close_matches("wheel", _keyword.kwlist)
['while']
>>> get_close_matches("Apple", _keyword.kwlist)
[]
>>> get_close_matches("accept", _keyword.kwlist)
['except']
r
zn must be > 0: %rg r z cutoff must be in [0.0, 1.0]: %rc S s g | ] \}}|�qS r r )r[ ZscorerF r r r �
<listcomp>� s z%get_close_matches.<locals>.<listcomp>) �
ValueErrorr r r r` r_ r^ r* � _nlargest)ZwordZ
possibilitiesr4 �cutoff�result�srF r r r r � s"
�
�
c C s d� dd� t| |�D ��S )zAReplace whitespace with the original whitespace characters in `s`r c s s* | ]"\}}|d kr |� � r |n|V qdS )� N)�isspace)r[ �cZtag_cr r r r\ � s �z$_keep_original_ws.<locals>.<genexpr>)�join�zip)rk Ztag_sr r r �_keep_original_ws� s
�rq c @ sJ e Zd ZdZddd�Zdd� Zdd� Zd d
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Differ is a class for comparing sequences of lines of text, and
producing human-readable differences or deltas. Differ uses
SequenceMatcher both to compare sequences of lines, and to compare
sequences of characters within similar (near-matching) lines.
Each line of a Differ delta begins with a two-letter code:
'- ' line unique to sequence 1
'+ ' line unique to sequence 2
' ' line common to both sequences
'? ' line not present in either input sequence
Lines beginning with '? ' attempt to guide the eye to intraline
differences, and were not present in either input sequence. These lines
can be confusing if the sequences contain tab characters.
Note that Differ makes no claim to produce a *minimal* diff. To the
contrary, minimal diffs are often counter-intuitive, because they synch
up anywhere possible, sometimes accidental matches 100 pages apart.
Restricting synch points to contiguous matches preserves some notion of
locality, at the occasional cost of producing a longer diff.
Example: Comparing two texts.
First we set up the texts, sequences of individual single-line strings
ending with newlines (such sequences can also be obtained from the
`readlines()` method of file-like objects):
>>> text1 = ''' 1. Beautiful is better than ugly.
... 2. Explicit is better than implicit.
... 3. Simple is better than complex.
... 4. Complex is better than complicated.
... '''.splitlines(keepends=True)
>>> len(text1)
4
>>> text1[0][-1]
'\n'
>>> text2 = ''' 1. Beautiful is better than ugly.
... 3. Simple is better than complex.
... 4. Complicated is better than complex.
... 5. Flat is better than nested.
... '''.splitlines(keepends=True)
Next we instantiate a Differ object:
>>> d = Differ()
Note that when instantiating a Differ object we may pass functions to
filter out line and character 'junk'. See Differ.__init__ for details.
Finally, we compare the two:
>>> result = list(d.compare(text1, text2))
'result' is a list of strings, so let's pretty-print it:
>>> from pprint import pprint as _pprint
>>> _pprint(result)
[' 1. Beautiful is better than ugly.\n',
'- 2. Explicit is better than implicit.\n',
'- 3. Simple is better than complex.\n',
'+ 3. Simple is better than complex.\n',
'? ++\n',
'- 4. Complex is better than complicated.\n',
'? ^ ---- ^\n',
'+ 4. Complicated is better than complex.\n',
'? ++++ ^ ^\n',
'+ 5. Flat is better than nested.\n']
As a single multi-line string it looks like this:
>>> print(''.join(result), end="")
1. Beautiful is better than ugly.
- 2. Explicit is better than implicit.
- 3. Simple is better than complex.
+ 3. Simple is better than complex.
? ++
- 4. Complex is better than complicated.
? ^ ---- ^
+ 4. Complicated is better than complex.
? ++++ ^ ^
+ 5. Flat is better than nested.
Methods:
__init__(linejunk=None, charjunk=None)
Construct a text differencer, with optional filters.
compare(a, b)
Compare two sequences of lines; generate the resulting delta.
Nc C s || _ || _dS )a�
Construct a text differencer, with optional filters.
The two optional keyword parameters are for filter functions:
- `linejunk`: A function that should accept a single string argument,
and return true iff the string is junk. The module-level function
`IS_LINE_JUNK` may be used to filter out lines without visible
characters, except for at most one splat ('#'). It is recommended
to leave linejunk None; the underlying SequenceMatcher class has
an adaptive notion of "noise" lines that's better than any static
definition the author has ever been able to craft.
- `charjunk`: A function that should accept a string of length 1. The
module-level function `IS_CHARACTER_JUNK` may be used to filter out
whitespace characters (a blank or tab; **note**: bad idea to include
newline in this!). Use of IS_CHARACTER_JUNK is recommended.
N��linejunk�charjunk)r rs rt r r r r H s zDiffer.__init__c
c s� t | j||�}|�� D ]�\}}}}}|dkrB| �||||||�} n\|dkr\| �d|||�} nB|dkrv| �d|||�} n(|dkr�| �d|||�} ntd|f ��| E d H qd S )
a�
Compare two sequences of lines; generate the resulting delta.
Each sequence must contain individual single-line strings ending with
newlines. Such sequences can be obtained from the `readlines()` method
of file-like objects. The delta generated also consists of newline-
terminated strings, ready to be printed as-is via the writeline()
method of a file-like object.
Example:
>>> print(''.join(Differ().compare('one\ntwo\nthree\n'.splitlines(True),
... 'ore\ntree\nemu\n'.splitlines(True))),
... end="")
- one
? ^
+ ore
? ^
- two
- three
? -
+ tree
+ emu
rL rM �-rN �+rO rl �unknown tag %rN)r rs rT �_fancy_replace�_dumprg )
r r r �cruncherrS r8 r9 r: r; �gr r r �compare_ s zDiffer.comparec c s& t ||�D ]}d||| f V q
dS )z4Generate comparison results for a same-tagged range.z%s %sN)r6 )r rS rF �lo�hir1 r r r ry � s z Differ._dumpc
c s� ||k r||k st �|| || k rF| �d|||�}| �d|||�}n | �d|||�}| �d|||�}||fD ]} | E d H qnd S )Nrv ru )�AssertionErrorry )
r r r8 r9 r r: r; �first�secondr{ r r r �_plain_replace� s zDiffer._plain_replacec c s: d\}}t | j�} d\}
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||� | � � D ]�\}}}}}|| || }} |dk�r�|d| 7 }|d| 7 }nb|dk�r�|d | 7 }nJ|d
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When replacing one block of lines with another, search the blocks
for *similar* lines; the best-matching pair (if any) is used as a
synch point, and intraline difference marking is done on the
similar pair. Lots of work, but often worth it.
Example:
>>> d = Differ()
>>> results = d._fancy_replace(['abcDefghiJkl\n'], 0, 1,
... ['abcdefGhijkl\n'], 0, 1)
>>> print(''.join(results), end="")
- abcDefghiJkl
? ^ ^ ^
+ abcdefGhijkl
? ^ ^ ^
)g�G�z��?g �?)NNNr r rL �^rM ru rN rv rO rl rw � r& )r rt r6 r r r` r_ r^ r� �
_fancy_helperr rT rg �_qformat) r r r8 r9 r r: r; Z
best_ratiori rz ZeqiZeqjr< rQ r1 rP Zbest_iZbest_jZaeltZbelt�atags�btagsrS Zai1Zai2Zbj1Zbj2rD rE r r r rx � s\
�
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zDiffer._fancy_replacec c sb g }||k r<||k r*| � ||||||�}qT| �d|||�}n||k rT| �d|||�}|E d H d S )Nru rv )rx ry )r r r8 r9 r r: r; r{ r r r r� � s zDiffer._fancy_helperc c sX t ||��� }t ||��� }d| V |r8d|� d�V d| V |rTd|� d�V dS )a�
Format "?" output and deal with tabs.
Example:
>>> d = Differ()
>>> results = d._qformat('\tabcDefghiJkl\n', '\tabcdefGhijkl\n',
... ' ^ ^ ^ ', ' ^ ^ ^ ')
>>> for line in results: print(repr(line))
...
'- \tabcDefghiJkl\n'
'? \t ^ ^ ^\n'
'+ \tabcdefGhijkl\n'
'? \t ^ ^ ^\n'
�- z? �
�+ N)rq �rstrip)r ZalineZbliner� r� r r r r� s
zDiffer._qformat)NN) ra rb rc rd r r| ry r� rx r� r� r r r r r � s ]
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\s*(?:#\s*)?$c C s || �dk S )z�
Return True for ignorable line: iff `line` is blank or contains a single '#'.
Examples:
>>> IS_LINE_JUNK('\n')
True
>>> IS_LINE_JUNK(' # \n')
True
>>> IS_LINE_JUNK('hello\n')
False
Nr )�lineZpatr r r r 3 s � c C s | |kS )z�
Return True for ignorable character: iff `ch` is a space or tab.
Examples:
>>> IS_CHARACTER_JUNK(' ')
True
>>> IS_CHARACTER_JUNK('\t')
True
>>> IS_CHARACTER_JUNK('\n')
False
>>> IS_CHARACTER_JUNK('x')
False
r )ZchZwsr r r r C s c C s: | d }|| }|dkr"d� |�S |s.|d8 }d� ||�S �z Convert range to the "ed" formatr& z{}z{},{}��format��start�stopZ beginningr r r r �_format_range_unifiedZ s
r� r r� c c sP t | ||||||� d}td| |��|�D �] } |s|d}|rFd�|�nd}
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�}d�|||�V | D ]�\}}}}}|dkr�| ||� D ]}d| V q�q�|dk�r"| ||� D ]}d| V �q|dkr�|||� D ]}d| V �q6q�q*dS )a�
Compare two sequences of lines; generate the delta as a unified diff.
Unified diffs are a compact way of showing line changes and a few
lines of context. The number of context lines is set by 'n' which
defaults to three.
By default, the diff control lines (those with ---, +++, or @@) are
created with a trailing newline. This is helpful so that inputs
created from file.readlines() result in diffs that are suitable for
file.writelines() since both the inputs and outputs have trailing
newlines.
For inputs that do not have trailing newlines, set the lineterm
argument to "" so that the output will be uniformly newline free.
The unidiff format normally has a header for filenames and modification
times. Any or all of these may be specified using strings for
'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
The modification times are normally expressed in the ISO 8601 format.
Example:
>>> for line in unified_diff('one two three four'.split(),
... 'zero one tree four'.split(), 'Original', 'Current',
... '2005-01-26 23:30:50', '2010-04-02 10:20:52',
... lineterm=''):
... print(line) # doctest: +NORMALIZE_WHITESPACE
--- Original 2005-01-26 23:30:50
+++ Current 2010-04-02 10:20:52
@@ -1,4 +1,4 @@
+zero
one
-two
-three
+tree
four
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