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� z fc @ s� d Z d d l m Z m Z d d d g Z d d l Z e j d e d d �d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ d S( s� Classes to represent arbitrary sets (including sets of sets). This module implements sets using dictionaries whose values are ignored. The usual operations (union, intersection, deletion, etc.) are provided as both methods and operators. Important: sets are not sequences! While they support 'x in s', 'len(s)', and 'for x in s', none of those operations are unique for sequences; for example, mappings support all three as well. The characteristic operation for sequences is subscripting with small integers: s[i], for i in range(len(s)). Sets don't support subscripting at all. Also, sequences allow multiple occurrences and their elements have a definite order; sets on the other hand don't record multiple occurrences and don't remember the order of element insertion (which is why they don't support s[i]). The following classes are provided: BaseSet -- All the operations common to both mutable and immutable sets. This is an abstract class, not meant to be directly instantiated. Set -- Mutable sets, subclass of BaseSet; not hashable. ImmutableSet -- Immutable sets, subclass of BaseSet; hashable. An iterable argument is mandatory to create an ImmutableSet. _TemporarilyImmutableSet -- A wrapper around a Set, hashable, giving the same hash value as the immutable set equivalent would have. Do not use this class directly. Only hashable objects can be added to a Set. In particular, you cannot really add a Set as an element to another Set; if you try, what is actually added is an ImmutableSet built from it (it compares equal to the one you tried adding). When you ask if `x in y' where x is a Set and y is a Set or ImmutableSet, x is wrapped into a _TemporarilyImmutableSet z, and what's tested is actually `z in y'. i����( t ifiltert ifilterfalset BaseSett Sett ImmutableSetNs the sets module is deprecatedt stackleveli c B s" e Z d Z d g Z d � Z d � Z d � Z e Z e d � Z d � Z d � Z d � Z d � Z d � Z e Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e Z e Z d � Z d � Z d Z! d � Z" d � Z# d � Z$ RS( s1 Common base class for mutable and immutable sets.t _datac C s | j t k r t d � n d S( s This is an abstract class.s7 BaseSet is an abstract class. Use Set or ImmutableSet.N( t __class__R t TypeError( t self( ( s /usr/lib64/python2.7/sets.pyt __init__H s c C s t | j � S( s' Return the number of elements of a set.( t lenR ( R ( ( s /usr/lib64/python2.7/sets.pyt __len__Q s c C s | j � S( se Return string representation of a set. This looks like 'Set([<list of elements>])'. ( t _repr( R ( ( s /usr/lib64/python2.7/sets.pyt __repr__U s c C s6 | j j � } | r" | j � n d | j j | f S( Ns %s(%r)( R t keyst sortR t __name__( R t sortedt elements( ( s /usr/lib64/python2.7/sets.pyR _ s c C s | j j � S( ss Return an iterator over the elements or a set. This is the keys iterator for the underlying dict. ( R t iterkeys( R ( ( s /usr/lib64/python2.7/sets.pyt __iter__e s c C s t d � d S( Ns can't compare sets using cmp()( R ( R t other( ( s /usr/lib64/python2.7/sets.pyt __cmp__q s c C s' t | t � r | j | j k St Sd S( N( t isinstanceR R t False( R R ( ( s /usr/lib64/python2.7/sets.pyt __eq__� s c C s' t | t � r | j | j k St Sd S( N( R R R t True( R R ( ( s /usr/lib64/python2.7/sets.pyt __ne__� s c C s# | j � } | j j | j � | S( s Return a shallow copy of a set.( R R t update( R t result( ( s /usr/lib64/python2.7/sets.pyt copy� s c C sc d d l m } | j � } | | t | � <| j } t } x! | D] } | | | | | � <qB W| S( s1 Return a deep copy of a set; used by copy module.i����( t deepcopy( R R R t idR R ( R t memoR R t datat valuet elt( ( s /usr/lib64/python2.7/sets.pyt __deepcopy__� s c C s t | t � s t S| j | � S( sh Return the union of two sets as a new set. (I.e. all elements that are in either set.) ( R R t NotImplementedt union( R R ( ( s /usr/lib64/python2.7/sets.pyt __or__� s c C s | j | � } | j | � | S( sh Return the union of two sets as a new set. (I.e. all elements that are in either set.) ( R t _update( R R R ( ( s /usr/lib64/python2.7/sets.pyR( � s c C s t | t � s t S| j | � S( sn Return the intersection of two sets as a new set. (I.e. all elements that are in both sets.) ( R R R' t intersection( R R ( ( s /usr/lib64/python2.7/sets.pyt __and__� s c C su t | t � s t | � } n t | � t | � k rF | | } } n | | } } t | j j | � } | j | � S( sn Return the intersection of two sets as a new set. (I.e. all elements that are in both sets.) ( R R R R R R t __contains__R ( R R t littlet bigt common( ( s /usr/lib64/python2.7/sets.pyR+ � s c C s t | t � s t S| j | � S( s� Return the symmetric difference of two sets as a new set. (I.e. all elements that are in exactly one of the sets.) ( R R R' t symmetric_difference( R R ( ( s /usr/lib64/python2.7/sets.pyt __xor__� s c C s� | j � } | j } t } | j } y | j } Wn t k rS t | � j } n Xx$ t | j | � D] } | | | <qg Wx$ t | j | � D] } | | | <q� W| S( s� Return the symmetric difference of two sets as a new set. (I.e. all elements that are in exactly one of the sets.) ( R R R t AttributeErrorR R R- ( R R R R# R$ t selfdatat otherdataR% ( ( s /usr/lib64/python2.7/sets.pyR1 � s c C s t | t � s t S| j | � S( s� Return the difference of two sets as a new Set. (I.e. all elements that are in this set and not in the other.) ( R R R' t difference( R R ( ( s /usr/lib64/python2.7/sets.pyt __sub__� s c C sv | j � } | j } y | j } Wn t k rD t | � j } n Xt } x$ t | j | � D] } | | | <q^ W| S( s� Return the difference of two sets as a new Set. (I.e. all elements that are in this set and not in the other.) ( R R R3 R R R R- ( R R R R# R5 R$ R% ( ( s /usr/lib64/python2.7/sets.pyR6 s c C sZ y | | j k SWnB t k rU t | d d � } | d k rE � n | � | j k SXd S( s{ Report whether an element is a member of a set. (Called in response to the expression `element in self'.) t __as_temporarily_immutable__N( R R t getattrt None( R t elementt transform( ( s /usr/lib64/python2.7/sets.pyR- s c C sN | j | � t | � t | � k r) t Sx t | j j | � D] } t SWt S( s- Report whether another set contains this set.( t _binary_sanity_checkR R R R R- R ( R R R% ( ( s /usr/lib64/python2.7/sets.pyt issubset! s c C sN | j | � t | � t | � k r) t Sx t | j j | � D] } t SWt S( s- Report whether this set contains another set.( R= R R R R R- R ( R R R% ( ( s /usr/lib64/python2.7/sets.pyt issuperset* s c C s2 | j | � t | � t | � k o1 | j | � S( N( R= R R> ( R R ( ( s /usr/lib64/python2.7/sets.pyt __lt__7 s c C s2 | j | � t | � t | � k o1 | j | � S( N( R= R R? ( R R ( ( s /usr/lib64/python2.7/sets.pyt __gt__; s c C s t | t � s t d � n d S( Ns, Binary operation only permitted between sets( R R R ( R R ( ( s /usr/lib64/python2.7/sets.pyR= D s c C s+ d } x | D] } | t | � N} q W| S( Ni ( t hash( R R R% ( ( s /usr/lib64/python2.7/sets.pyt _compute_hashJ s c C s9 | j } t | t � r, | j | j � d St } t | � t t t f k r� t | � } x� t r� y# x | D] } | | | <ql Wd SWq\ t k r� t | d d � } | d k r� � n | | | � <q\ Xq\ Wnd xa | D]Y } y | | | <Wq� t k r0t | d d � } | d k r � n | | | � <q� Xq� Wd S( Nt __as_immutable__( R R R R R t typet listt tuplet xranget iterR R9 R: ( R t iterableR# R$ t itR; R< ( ( s /usr/lib64/python2.7/sets.pyR* U s2 N(% R t __module__t __doc__t __slots__R R R t __str__R R R R R R R t __copy__R& R) R( R, R+ R2 R1 R7 R6 R- R> R? t __le__t __ge__R@ RA R: t __hash__R= RC R* ( ( ( s /usr/lib64/python2.7/sets.pyR A sB c B s> e Z d Z d g Z d d � Z d � Z d � Z d � Z RS( s Immutable set class.t _hashcodec C s2 d | _ i | _ | d k r. | j | � n d S( s5 Construct an immutable set from an optional iterable.N( R: RT R R* ( R RJ ( ( s /usr/lib64/python2.7/sets.pyR � s c C s( | j d k r! | j � | _ n | j S( N( RT R: RC ( R ( ( s /usr/lib64/python2.7/sets.pyRS � s c C s | j | j f S( N( R RT ( R ( ( s /usr/lib64/python2.7/sets.pyt __getstate__� s c C s | \ | _ | _ d S( N( R RT ( R t state( ( s /usr/lib64/python2.7/sets.pyt __setstate__� s N( R RL RM RN R: R RS RU RW ( ( ( s /usr/lib64/python2.7/sets.pyR z s c B s� e Z d Z g Z d d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z RS( s Mutable set class.c C s) i | _ | d k r% | j | � n d S( s* Construct a set from an optional iterable.N( R R: R* ( R RJ ( ( s /usr/lib64/python2.7/sets.pyR � s c C s | j f S( N( R ( R ( ( s /usr/lib64/python2.7/sets.pyRU � s c C s | \ | _ d S( N( R ( R R# ( ( s /usr/lib64/python2.7/sets.pyRW � s c C s$ | j | � | j j | j � | S( s2 Update a set with the union of itself and another.( R= R R ( R R ( ( s /usr/lib64/python2.7/sets.pyt __ior__� s c C s | j | � d S( s2 Update a set with the union of itself and another.N( R* ( R R ( ( s /usr/lib64/python2.7/sets.pyt union_update� s c C s! | j | � | | @j | _ | S( s9 Update a set with the intersection of itself and another.( R= R ( R R ( ( s /usr/lib64/python2.7/sets.pyt __iand__� s c C s5 t | t � r | | M} n | j | � j | _ d S( s9 Update a set with the intersection of itself and another.N( R R R+ R ( R R ( ( s /usr/lib64/python2.7/sets.pyt intersection_update� s c C s | j | � | j | � | S( sA Update a set with the symmetric difference of itself and another.( R= t symmetric_difference_update( R R ( ( s /usr/lib64/python2.7/sets.pyt __ixor__� s c C s{ | j } t } t | t � s- t | � } n | | k rF | j � n x. | D]& } | | k ri | | =qM | | | <qM Wd S( sA Update a set with the symmetric difference of itself and another.N( R R R R R t clear( R R R# R$ R% ( ( s /usr/lib64/python2.7/sets.pyR\ � s c C s | j | � | j | � | S( s1 Remove all elements of another set from this set.( R= t difference_update( R R ( ( s /usr/lib64/python2.7/sets.pyt __isub__� s c C sh | j } t | t � s' t | � } n | | k r@ | j � n x! t | j | � D] } | | =qS Wd S( s1 Remove all elements of another set from this set.N( R R R R R^ R R- ( R R R# R% ( ( s /usr/lib64/python2.7/sets.pyR_ � s c C s | j | � d S( s9 Add all values from an iterable (such as a list or file).N( R* ( R RJ ( ( s /usr/lib64/python2.7/sets.pyR � s c C s | j j � d S( s" Remove all elements from this set.N( R R^ ( R ( ( s /usr/lib64/python2.7/sets.pyR^ � s c C s] y t | j | <WnE t k rX t | d d � } | d k rE � n t | j | � <n Xd S( s` Add an element to a set. This has no effect if the element is already present. RD N( R R R R9 R: ( R R; R< ( ( s /usr/lib64/python2.7/sets.pyt add� s c C sW y | j | =WnB t k rR t | d d � } | d k rB � n | j | � =n Xd S( sv Remove an element from a set; it must be a member. If the element is not a member, raise a KeyError. R8 N( R R R9 R: ( R R; R< ( ( s /usr/lib64/python2.7/sets.pyt remove s c C s) y | j | � Wn t k r$ n Xd S( sm Remove an element from a set if it is a member. If the element is not a member, do nothing. N( Rb t KeyError( R R; ( ( s /usr/lib64/python2.7/sets.pyt discard s c C s | j j � d S( s+ Remove and return an arbitrary set element.i ( R t popitem( R ( ( s /usr/lib64/python2.7/sets.pyt pop s c C s t | � S( N( R ( R ( ( s /usr/lib64/python2.7/sets.pyRD s c C s t | � S( N( t _TemporarilyImmutableSet( R ( ( s /usr/lib64/python2.7/sets.pyR8 s N( R RL RM RN R: R RU RW RX RY RZ R[ R] R\ R` R_ R R^ Ra Rb Rd Rf RD R8 ( ( ( s /usr/lib64/python2.7/sets.pyR � s* Rg c B s e Z d � Z d � Z RS( c C s | | _ | j | _ d S( N( t _setR ( R t set( ( s /usr/lib64/python2.7/sets.pyR ( s c C s | j j � S( N( Rh RC ( R ( ( s /usr/lib64/python2.7/sets.pyRS , s ( R RL R RS ( ( ( s /usr/lib64/python2.7/sets.pyRg $ s ( RM t itertoolsR R t __all__t warningst warnt DeprecationWarningt objectR R R Rg ( ( ( s /usr/lib64/python2.7/sets.pyt <module>) s � :�
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