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r Y nX G d(d de+Z0G d)d d ej1Z2G d*d dej1Z3G d+d dej Z4G d,d dej5Z6d S )-a? This module implements specialized container datatypes providing
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* ChainMap dict-like class for creating a single view of multiple mappings
* Counter dict subclass for counting hashable objects
* OrderedDict dict subclass that remembers the order entries were added
* defaultdict dict subclass that calls a factory function to supply missing values
* UserDict wrapper around dictionary objects for easier dict subclassing
* UserList wrapper around list objects for easier list subclassing
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zOrderedDict.clearTc C sj | s t d| j}|r0|j}|j}||_||_n|j}|j}||_||_|j}| j|= t| |}||fS )zRemove and return a (key, value) pair from the dictionary.
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rt Y nX |d k r||_%|S )/aC Returns a new subclass of tuple with named fields.
>>> Point = namedtuple('Point', ['x', 'y'])
>>> Point.__doc__ # docstring for the new class
'Point(x, y)'
>>> p = Point(11, y=22) # instantiate with positional args or keywords
>>> p[0] + p[1] # indexable like a plain tuple
33
>>> x, y = p # unpack like a regular tuple
>>> x, y
(11, 22)
>>> p.x + p.y # fields also accessible by name
33
>>> d = p._asdict() # convert to a dictionary
>>> d['x']
11
>>> Point(**d) # convert from a dictionary
Point(x=11, y=22)
>>> p._replace(x=100) # _replace() is like str.replace() but targets named fields
Point(x=100, y=22)
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rQ N)r )mappingrl Z mapping_getelemr! r! r" _count_elements s r )r c s e Zd ZdZd/ fdd Zdd Zd0ddZd d
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fddZdd Zdd Zdd Zd d Zd d Zd!d" Zd#d$ Zd%d& Zd'd( Zd)d* Zd+d, Zd-d. Z ZS )4r a Dict subclass for counting hashable items. Sometimes called a bag
or multiset. Elements are stored as dictionary keys and their counts
are stored as dictionary values.
>>> c = Counter('abcdeabcdabcaba') # count elements from a string
>>> c.most_common(3) # three most common elements
[('a', 5), ('b', 4), ('c', 3)]
>>> sorted(c) # list all unique elements
['a', 'b', 'c', 'd', 'e']
>>> ''.join(sorted(c.elements())) # list elements with repetitions
'aaaaabbbbcccdde'
>>> sum(c.values()) # total of all counts
15
>>> c['a'] # count of letter 'a'
5
>>> for elem in 'shazam': # update counts from an iterable
... c[elem] += 1 # by adding 1 to each element's count
>>> c['a'] # now there are seven 'a'
7
>>> del c['b'] # remove all 'b'
>>> c['b'] # now there are zero 'b'
0
>>> d = Counter('simsalabim') # make another counter
>>> c.update(d) # add in the second counter
>>> c['a'] # now there are nine 'a'
9
>>> c.clear() # empty the counter
>>> c
Counter()
Note: If a count is set to zero or reduced to zero, it will remain
in the counter until the entry is deleted or the counter is cleared:
>>> c = Counter('aaabbc')
>>> c['b'] -= 2 # reduce the count of 'b' by two
>>> c.most_common() # 'b' is still in, but its count is zero
[('a', 3), ('c', 1), ('b', 0)]
Nc s t t| | j|f| dS )a Create a new, empty Counter object. And if given, count elements
from an input iterable. Or, initialize the count from another mapping
of elements to their counts.
>>> c = Counter() # a new, empty counter
>>> c = Counter('gallahad') # a new counter from an iterable
>>> c = Counter({'a': 4, 'b': 2}) # a new counter from a mapping
>>> c = Counter(a=4, b=2) # a new counter from keyword args
N)superr r@ rv )r* rl r> rj r! r" r@ s zCounter.__init__c C s dS )z1The count of elements not in the Counter is zero.r
r! r0 r! r! r" __missing__* s zCounter.__missing__c C s6 |dkr t | tdddS tj|| tddS )zList the n most common elements and their counts from the most
common to the least. If n is None, then list all element counts.
>>> Counter('abracadabra').most_common(3)
[('a', 5), ('b', 2), ('r', 2)]
NrQ T)r1 reverser1 )sortedrZ r~ _heapqnlargestr* rV r! r! r" most_common/ s zCounter.most_commonc C s t tt| S )a Iterator over elements repeating each as many times as its count.
>>> c = Counter('ABCABC')
>>> sorted(c.elements())
['A', 'A', 'B', 'B', 'C', 'C']
# Knuth's example for prime factors of 1836: 2**2 * 3**3 * 17**1
>>> prime_factors = Counter({2: 2, 3: 3, 17: 1})
>>> product = 1
>>> for factor in prime_factors.elements(): # loop over factors
... product *= factor # and multiply them
>>> product
1836
Note, if an element's count has been set to zero or is a negative
number, elements() will ignore it.
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from_iterable_starmap_repeatrZ r) r! r! r" elements< s zCounter.elementsc C s t dd S )Nz@Counter.fromkeys() is undefined. Use Counter(iterable) instead.)NotImplementedError)rk rl vr! r! r" rm T s zCounter.fromkeysc sr |dk r`t |tjrV| rD| j}| D ]\}}|||d | |< q&q`tt| | n
t| | |rn| | dS )a Like dict.update() but add counts instead of replacing them.
Source can be an iterable, a dictionary, or another Counter instance.
>>> c = Counter('which')
>>> c.update('witch') # add elements from another iterable
>>> d = Counter('watch')
>>> c.update(d) # add elements from another counter
>>> c['h'] # four 'h' in which, witch, and watch
4
Nr
) rn r Mappingr rZ r r rv r r* rl r> self_getr countrj r! r" rv ` s
zCounter.updatec K sn |dk r\| j }t|tjr@| D ]\}}||d| | |< q"n |D ]}||dd | |< qD|rj| | dS )a Like dict.update() but subtracts counts instead of replacing them.
Counts can be reduced below zero. Both the inputs and outputs are
allowed to contain zero and negative counts.
Source can be an iterable, a dictionary, or another Counter instance.
>>> c = Counter('which')
>>> c.subtract('witch') # subtract elements from another iterable
>>> c.subtract(Counter('watch')) # subtract elements from another counter
>>> c['h'] # 2 in which, minus 1 in witch, minus 1 in watch
0
>>> c['w'] # 1 in which, minus 1 in witch, minus 1 in watch
-1
Nr
rQ )r rn r r rZ subtractr r! r! r" r s zCounter.subtractc C s
| | S )zReturn a shallow copy.rj r) r! r! r" rf s z Counter.copyc C s | j t| ffS r% )rb rL r) r! r! r" ri s zCounter.__reduce__c s || krt | dS )zGLike dict.__delitem__() but does not raise KeyError for missing values.N)r rH )r* r rj r! r" rH s zCounter.__delitem__c C sf | sd| j j S z(dtdj| }d| j j|f W S tk
r` d| j jt| Y S X d S )Nra r z%r: %rz%s({%s})z
{0}({1!r})) rb r r rq __mod__r r formatrL )r* rZ r! r! r" rd s zCounter.__repr__c C sp t |tstS t }| D ]$\}}||| }|dkr |||< q | D ] \}}|| krJ|dkrJ|||< qJ|S )zAdd counts from two counters.
>>> Counter('abbb') + Counter('bcc')
Counter({'b': 4, 'c': 2, 'a': 1})
r
rn r NotImplementedrZ r* r= r^ r r newcountr! r! r" __add__ s
zCounter.__add__c C st t |tstS t }| D ]$\}}||| }|dkr |||< q | D ]$\}}|| krJ|dk rJd| ||< qJ|S )z Subtract count, but keep only results with positive counts.
>>> Counter('abbbc') - Counter('bccd')
Counter({'b': 2, 'a': 1})
r
r r r! r! r" __sub__ s
zCounter.__sub__c C s| t |tstS t }| D ]0\}}|| }||k r8|n|}|dkr |||< q | D ] \}}|| krV|dkrV|||< qV|S )zUnion is the maximum of value in either of the input counters.
>>> Counter('abbb') | Counter('bcc')
Counter({'b': 3, 'c': 2, 'a': 1})
r
r r* r= r^ r r other_countr r! r! r" __or__ s
zCounter.__or__c C sR t |tstS t }| D ]0\}}|| }||k r8|n|}|dkr |||< q |S )z Intersection is the minimum of corresponding counts.
>>> Counter('abbb') & Counter('bcc')
Counter({'b': 1})
r
r r r! r! r" __and__ s
zCounter.__and__c C s, t }| D ]\}}|dkr|||< q|S )zEAdds an empty counter, effectively stripping negative and zero countsr
r rZ r* r^ r r r! r! r" __pos__
s
zCounter.__pos__c C s0 t }| D ] \}}|dk rd| ||< q|S )z{Subtracts from an empty counter. Strips positive and zero counts,
and flips the sign on negative counts.
r
r r r! r! r" __neg__ s
zCounter.__neg__c C s& dd | D }|D ]
}| |= q| S )z?Internal method to strip elements with a negative or zero countc S s g | ]\}}|d ks|qS )r
r! )r r r r! r! r"
" s z*Counter._keep_positive..)rZ )r* nonpositiver r! r! r" _keep_positive s zCounter._keep_positivec C s* | D ]\}}| | |7 < q| S )zInplace add from another counter, keeping only positive counts.
>>> c = Counter('abbb')
>>> c += Counter('bcc')
>>> c
Counter({'b': 4, 'c': 2, 'a': 1})
rZ r r* r= r r r! r! r" __iadd__' s zCounter.__iadd__c C s* | D ]\}}| | |8 < q| S )zInplace subtract counter, but keep only results with positive counts.
>>> c = Counter('abbbc')
>>> c -= Counter('bccd')
>>> c
Counter({'b': 2, 'a': 1})
r r r! r! r" __isub__4 s zCounter.__isub__c C s2 | D ] \}}| | }||kr|| |< q| S )zInplace union is the maximum of value from either counter.
>>> c = Counter('abbb')
>>> c |= Counter('bcc')
>>> c
Counter({'b': 3, 'c': 2, 'a': 1})
r )r* r= r r r r! r! r" __ior__A s
zCounter.__ior__c C s2 | D ] \}}|| }||k r|| |< q| S )zInplace intersection is the minimum of corresponding counts.
>>> c = Counter('abbb')
>>> c &= Counter('bcc')
>>> c
Counter({'b': 1})
r )r* r= r r r r! r! r" __iand__P s
zCounter.__iand__)N)N)N)N)N) r r- r. rt r@ r r r rz rm rv r rf ri rH rd r r r r r r r r r r r
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edd Zdd ZeZd(ddZedd Zd d Zd d Zd!d" Zd#d$ Zd%d& ZdS ))r a A ChainMap groups multiple dicts (or other mappings) together
to create a single, updateable view.
The underlying mappings are stored in a list. That list is public and can
be accessed or updated using the *maps* attribute. There is no other
state.
Lookups search the underlying mappings successively until a key is found.
In contrast, writes, updates, and deletions only operate on the first
mapping.
c G s t |p i g| _dS )zInitialize a ChainMap by setting *maps* to the given mappings.
If no mappings are provided, a single empty dictionary is used.
N)rc maps)r* r r! r! r" r@ r s zChainMap.__init__c C s t |d S r% )rM r0 r! r! r" r y s zChainMap.__missing__c C s: | j D ](}z|| W S tk
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zChainMap.__getitem__Nc C s || kr| | S |S r% r! r_ r! r! r" r s z ChainMap.getc C s t t j| j S r% )rT r unionr r) r! r! r" __len__ s zChainMap.__len__c C s& i }t | jD ]}|| qt|S r% )r' r rv rg )r* dr r! r! r" rJ s zChainMap.__iter__c s t fdd| jD S )Nc 3 s | ]} |kV qd S r% r! )r mr r! r" r s z(ChainMap.__contains__..anyr r0 r! r r" __contains__ s zChainMap.__contains__c C s
t | jS r% r r) r! r! r" __bool__ s zChainMap.__bool__c C s" | j j ddtt| j dS )Nr r r )rb r r rq r r r) r! r! r" rd s zChainMap.__repr__c G s | t j|f| S )z?Create a ChainMap with a single dict created from the iterable.)rL rm )rk rl argsr! r! r" rm s zChainMap.fromkeysc C s$ | j | jd f| jdd S )zHNew ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]r
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r N)r rE rM r )r* r1 r r! r! r" rE s z ChainMap.popc C s | j d dS )z'Clear maps[0], leaving maps[1:] intact.r
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t | jS r% r r) r! r! r" r 4 r zUserList.__len__c C s( t |tr| | j| S | j| S d S r% )rn slicerb r r* ir! r! r" r 5 s
zUserList.__getitem__c C s || j |< d S r% r r* r r r! r! r" rD : r zUserList.__setitem__c C s | j |= d S r% r r r! r! r" rH ; r zUserList.__delitem__c C sP t |tr | | j|j S t |t| jr<| | j| S | | jt| S r% rn r rb r r rc rs r! r! r" r < s
zUserList.__add__c C sP t |tr | |j| j S t |t| jr<| || j S | t|| j S r% r rs r! r! r" __radd__B s
zUserList.__radd__c C sR t |tr | j|j7 _n2t |t| jr<| j|7 _n| jt|7 _| S r% )rn r r r rc rs r! r! r" r H s
zUserList.__iadd__c C s | | j| S r% rb r r r! r! r" __mul__P s zUserList.__mul__c C s | j |9 _ | S r% r r r! r! r" __imul__S s zUserList.__imul__c C s8 | j | j }|j| j | jd d d |jd< |S r )rb r rU rv r r! r! r" r V s zUserList.__copy__c C s | j | d S r% )r appendr r! r! r" r% \ r zUserList.appendc C s | j || d S r% )r insertr r! r! r" r& ] r zUserList.insertr c C s | j |S r% )r rE r r! r! r" rE ^ r z UserList.popc C s | j | d S r% )r remover r! r! r" r' _ r zUserList.removec C s | j d S r% )r rK r) r! r! r" rK ` r zUserList.clearc C s
| | S r% rj r) r! r! r" rf a r z
UserList.copyc C s | j |S r% )r r r r! r! r" r b r zUserList.countc G s | j j|f| S r% r r )r* r r r! r! r" r c r zUserList.indexc C s | j d S r% )r r r) r! r! r" r d r zUserList.reversec O s | j j|| d S r% )r sortr* r r> r! r! r" r) e r z
UserList.sortc C s* t |tr| j|j n | j| d S r% )rn r r extendrs r! r! r" r+ f s
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zUserString.__init__c C s
t | jS r% )r r r) r! r! r" __str__z r zUserString.__str__c C s
t | jS r% r
r) r! r! r" rd { r zUserString.__repr__c C s
t | jS r% )intr r) r! r! r" __int__| r zUserString.__int__c C s
t | jS r% )floatr r) r! r! r" __float__} r zUserString.__float__c C s
t | jS r% )complexr r) r! r! r" __complex__~ r zUserString.__complex__c C s
t | jS r% )hashr r) r! r! r" __hash__ r zUserString.__hash__c C s | j d d fS r% r r) r! r! r" r s zUserString.__getnewargs__c C s t |tr| j|jkS | j|kS r% rn r r r* stringr! r! r" ro s
zUserString.__eq__c C s t |tr| j|jk S | j|k S r% r8 r9 r! r! r" r s
zUserString.__lt__c C s t |tr| j|jkS | j|kS r% r8 r9 r! r! r" r s
zUserString.__le__c C s t |tr| j|jkS | j|kS r% r8 r9 r! r! r" r s
zUserString.__gt__c C s t |tr| j|jkS | j|kS r% r8 r9 r! r! r" r s
zUserString.__ge__c C s t |tr|j}|| jkS r% r8 )r* charr! r! r" r s
zUserString.__contains__c C s
t | jS r% r r) r! r! r" r r zUserString.__len__c C s | | j| S r% r" )r* r r! r! r" r r zUserString.__getitem__c C sJ t |tr | | j|j S t |tr6| | j| S | | jt| S r% )rn r rb r r rs r! r! r" r s
zUserString.__add__c C s. t |tr| || j S | t|| j S r% )rn r rb r rs r! r! r" r! s
zUserString.__radd__c C s | | j| S r% r" r r! r! r" r# s zUserString.__mul__c C s | | j| S r% r" r* r r! r! r" r s zUserString.__mod__c C s | t|| S r% )rb r )r* templater! r! r" __rmod__ s zUserString.__rmod__c C s | | j S r% )rb r
capitalizer) r! r! r" r? r zUserString.capitalizec C s | | j S r% )rb r casefoldr) r! r! r" r@ s zUserString.casefoldc G s | | jj|f| S r% )rb r centerr* widthr r! r! r" rA s zUserString.centerr
c C s t |tr|j}| j|||S r% )rn r r r r* substartendr! r! r" r s
zUserString.countutf-8strictc C s. |d kr dn|}|d kr dn|}| j ||S )NrH rI )r encode)r* encodingerrorsr! r! r" rJ s zUserString.encodec C s | j |||S r% )r endswith)r* suffixrF rG r! r! r" rM s zUserString.endswith c C s | | j|S r% )rb r
expandtabs)r* tabsizer! r! r" rP s zUserString.expandtabsc C s t |tr|j}| j|||S r% )rn r r findrD r! r! r" rR s
zUserString.findc O s | j j||S r% )r r r* r! r! r" r s zUserString.formatc C s | j |S r% )r
format_map)r* r r! r! r" rS s zUserString.format_mapc C s | j |||S r% r( rD r! r! r" r s zUserString.indexc C s
| j S r% )r isalphar) r! r! r" rT r zUserString.isalphac C s
| j S r% )r isalnumr) r! r! r" rU r zUserString.isalnumc C s
| j S r% )r isasciir) r! r! r" rV r zUserString.isasciic C s
| j S r% )r isdecimalr) r! r! r" rW r zUserString.isdecimalc C s
| j S r% )r isdigitr) r! r! r" rX r zUserString.isdigitc C s
| j S r% )r r r) r! r! r" r r zUserString.isidentifierc C s
| j S r% )r islowerr) r! r! r" rY r zUserString.islowerc C s
| j S r% )r isnumericr) r! r! r" rZ r zUserString.isnumericc C s
| j S r% )r isprintabler) r! r! r" r[ r zUserString.isprintablec C s
| j S r% )r isspacer) r! r! r" r\ r zUserString.isspacec C s
| j S r% )r istitler) r! r! r" r] r zUserString.istitlec C s
| j S r% )r isupperr) r! r! r" r^ r zUserString.isupperc C s | j |S r% )r r r- r! r! r" r r zUserString.joinc G s | | jj|f| S r% )rb r ljustrB r! r! r" r_ s zUserString.ljustc C s | | j S r% )rb r lowerr) r! r! r" r` r zUserString.lowerNc C s | | j|S r% )rb r lstripr* charsr! r! r" ra r zUserString.lstripc C s | j |S r% )r partitionr* sepr! r! r" rd s zUserString.partitionr c C s6 t |tr|j}t |tr |j}| | j|||S r% )rn r r rb r )r* oldnewmaxsplitr! r! r" r s
zUserString.replacec C s t |tr|j}| j|||S r% )rn r r rfindrD r! r! r" rj s
zUserString.rfindc C s | j |||S r% )r rindexrD r! r! r" rk s zUserString.rindexc G s | | jj|f| S r% )rb r rjustrB r! r! r" rl s zUserString.rjustc C s | j |S r% )r
rpartitionre r! r! r" rm s zUserString.rpartitionc C s | | j|S r% )rb r rstriprb r! r! r" rn s zUserString.rstripc C s | j ||S r% )r r r* rf ri r! r! r" r s zUserString.splitc C s | j ||S r% )r rsplitro r! r! r" rp s zUserString.rsplitFc C s | j |S r% )r
splitlines)r* keependsr! r! r" rq r zUserString.splitlinesc C s | j |||S r% )r r )r* prefixrF rG r! r! r" r s zUserString.startswithc C s | | j|S r% )rb r striprb r! r! r" rt r zUserString.stripc C s | | j S r% )rb r swapcaser) r! r! r" ru r zUserString.swapcasec C s | | j S r% )rb r titler) r! r! r" rv r zUserString.titlec G s | | jj| S r% )rb r translater< r! r! r" rw s zUserString.translatec C s | | j S r% )rb r upperr) r! r! r" rx r zUserString.upperc C s | | j|S r% )rb r zfill)r* rC r! r! r" ry r zUserString.zfill)rH rI )rO )N)r )N)Nr )Nr )F)N)Ir r- r. r@ r/ rd r1 r3 r5 r7 r ro r r r r r r r r r! r# r, r r> r? r@ rA rR maxsizer rJ rM rP rR r rS r rT rU rV rW rX r rY rZ r[ r\ r] r^ r r_ r` ra r maketransrd r rj rk rl rm rn r rp rq r rt ru rv rw rx ry r! r! r! r" r r s
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