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� n��fc @ s� d Z d d l Z d d l m Z m Z m Z m Z m Z m Z m Z d d l m Z d d l m Z e e f Z d d d d d d d d d d d d g Z d e j f d � � YZ d e f d � � YZ d e j f d � � YZ d S( s{ Weak reference support for Python. This module is an implementation of PEP 205: http://www.python.org/dev/peps/pep-0205/ i����N( t getweakrefcountt getweakrefst reft proxyt CallableProxyTypet ProxyTypet ReferenceType( t WeakSet( t ReferenceErrorR R R R t WeakKeyDictionaryR R R R t ProxyTypest WeakValueDictionaryR c B s� e Z d Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e Z d � Z d d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d d � Z d d � Z d � Z d � Z RS( s� Mapping class that references values weakly. Entries in the dictionary will be discarded when no strong reference to the value exists anymore c O s5 t | � d � } | | _ t j j | | | � d S( Nc S s) | � } | d k r% | j | j =n d S( N( t Nonet datat key( t wrt selfreft self( ( s /usr/lib64/python2.7/weakref.pyt remove0 s ( R t _removet UserDictt __init__( R t argst kwR ( ( s /usr/lib64/python2.7/weakref.pyR / s c C s0 | j | � } | d k r( t | � n | Sd S( N( R R t KeyError( R R t o( ( s /usr/lib64/python2.7/weakref.pyt __getitem__7 s c C s3 y | j | � } Wn t k r( t SX| d k S( N( R R t FalseR ( R R R ( ( s /usr/lib64/python2.7/weakref.pyt __contains__> s c C s3 y | j | � } Wn t k r( t SX| d k S( N( R R R R ( R R R ( ( s /usr/lib64/python2.7/weakref.pyt has_keyE s c C s d t | � S( Ns <WeakValueDictionary at %s>( t id( R ( ( s /usr/lib64/python2.7/weakref.pyt __repr__L s c C s t | | j | � | j | <d S( N( t KeyedRefR R ( R R t value( ( s /usr/lib64/python2.7/weakref.pyt __setitem__O s c C sO t � } x? | j j � D]. \ } } | � } | d k r | | | <q q W| S( N( R R t itemsR ( R t newR R R ( ( s /usr/lib64/python2.7/weakref.pyt copyR s c C sk d d l m } | j � } xH | j j � D]7 \ } } | � } | d k r, | | | | | � <q, q, W| S( Ni����( t deepcopy( R% R& t __class__R R# R ( R t memoR& R$ R R R ( ( s /usr/lib64/python2.7/weakref.pyt __deepcopy__\ s c C sG y | j | } Wn t k r% | SX| � } | d k r? | S| Sd S( N( R R R ( R R t defaultR R ( ( s /usr/lib64/python2.7/weakref.pyt gete s c C sU g } xH | j j � D]7 \ } } | � } | d k r | j | | f � q q W| S( N( R R# R t append( R t LR R R ( ( s /usr/lib64/python2.7/weakref.pyR# r s c c sD x= | j j � D], } | � } | d k r | j | f Vq q Wd S( N( R t itervaluesR R ( R R R! ( ( s /usr/lib64/python2.7/weakref.pyt iteritemsz s c C s | j j � S( N( R t iterkeys( R ( ( s /usr/lib64/python2.7/weakref.pyR0 � s c C s | j j � S( N( R R0 ( R ( ( s /usr/lib64/python2.7/weakref.pyt __iter__� s c C s | j j � S( s� Return an iterator that yields the weak references to the values. The references are not guaranteed to be 'live' at the time they are used, so the result of calling the references needs to be checked before being used. This can be used to avoid creating references that will cause the garbage collector to keep the values around longer than needed. ( R R. ( R ( ( s /usr/lib64/python2.7/weakref.pyt itervaluerefs� s c c s; x4 | j j � D]# } | � } | d k r | Vq q Wd S( N( R R. R ( R R t obj( ( s /usr/lib64/python2.7/weakref.pyR. � s c C s> x7 | j j � \ } } | � } | d k r | | f Sq d S( N( R t popitemR ( R R R R ( ( s /usr/lib64/python2.7/weakref.pyR4 � s c G s^ y | j j | � � } Wn" t k r= | r7 | d S� n X| d k rV t | � n | Sd S( Ni ( R t popR R ( R R R R ( ( s /usr/lib64/python2.7/weakref.pyR5 � s c C sM y | j | } Wn. t k rA t | | j | � | j | <| SX| � Sd S( N( R R R R ( R R R* R ( ( s /usr/lib64/python2.7/weakref.pyt setdefault� s c K s� | j } | d k rr t | d � s9 t i � | � } n x6 | j � D]% \ } } t | | j | � | | <qF Wn t | � r� | j | � n d S( NR# ( R R t hasattrt typeR# R R t lent update( R t dictt kwargst dR R ( ( s /usr/lib64/python2.7/weakref.pyR: � s c C s | j j � S( s~ Return a list of weak references to the values. The references are not guaranteed to be 'live' at the time they are used, so the result of calling the references needs to be checked before being used. This can be used to avoid creating references that will cause the garbage collector to keep the values around longer than needed. ( R t values( R ( ( s /usr/lib64/python2.7/weakref.pyt valuerefs� s c C sI g } x< | j j � D]+ } | � } | d k r | j | � q q W| S( N( R R> R R, ( R R- R R ( ( s /usr/lib64/python2.7/weakref.pyR> � s N( t __name__t __module__t __doc__R R R R R R" R% t __copy__R) R R+ R# R/ R0 R1 R2 R. R4 R5 R6 R: R? R> ( ( ( s /usr/lib64/python2.7/weakref.pyR # s. R c B s& e Z d Z d Z d � Z d � Z RS( s[ Specialized reference that includes a key corresponding to the value. This is used in the WeakValueDictionary to avoid having to create a function object for each key stored in the mapping. A shared callback object can use the 'key' attribute of a KeyedRef instead of getting a reference to the key from an enclosing scope. R c C s" t j | | | � } | | _ | S( N( R t __new__R ( R8 t obt callbackR R ( ( s /usr/lib64/python2.7/weakref.pyRD � s c C s t t | � j | | � d S( N( t superR R ( R RE RF R ( ( s /usr/lib64/python2.7/weakref.pyR � s ( s key( R@ RA RB t __slots__RD R ( ( ( s /usr/lib64/python2.7/weakref.pyR � s c B s� e Z d Z d d � Z d � Z d � Z d � Z d � Z d � Z e Z d � 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 d � Z d d � Z RS( s� Mapping class that references keys weakly. Entries in the dictionary will be discarded when there is no longer a strong reference to the key. This can be used to associate additional data with an object owned by other parts of an application without adding attributes to those objects. This can be especially useful with objects that override attribute accesses. c C sD i | _ t | � d � } | | _ | d k r@ | j | � n d S( Nc S s& | � } | d k r" | j | =n d S( N( R R ( t kR R ( ( s /usr/lib64/python2.7/weakref.pyR � s ( R R R R R: ( R R; R ( ( s /usr/lib64/python2.7/weakref.pyR � s c C s | j t | � =d S( N( R R ( R R ( ( s /usr/lib64/python2.7/weakref.pyt __delitem__� s c C s | j t | � S( N( R R ( R R ( ( s /usr/lib64/python2.7/weakref.pyR � s c C s d t | � S( Ns <WeakKeyDictionary at %s>( R ( R ( ( s /usr/lib64/python2.7/weakref.pyR s c C s | | j t | | j � <d S( N( R R R ( R R R! ( ( s /usr/lib64/python2.7/weakref.pyR" s c C sO t � } x? | j j � D]. \ } } | � } | d k r | | | <q q W| S( N( R R R# R ( R R$ R R! R ( ( s /usr/lib64/python2.7/weakref.pyR% s c C sk d d l m } | j � } xH | j j � D]7 \ } } | � } | d k r, | | | � | | <q, q, W| S( Ni����( R& ( R% R& R' R R# R ( R R( R& R$ R R! R ( ( s /usr/lib64/python2.7/weakref.pyR) s c C s | j j t | � | � S( N( R R+ R ( R R R* ( ( s /usr/lib64/python2.7/weakref.pyR+ s c C s2 y t | � } Wn t k r$ d SX| | j k S( Ni ( R t TypeErrorR ( R R R ( ( s /usr/lib64/python2.7/weakref.pyR s c C s2 y t | � } Wn t k r$ d SX| | j k S( Ni ( R RK R ( R R R ( ( s /usr/lib64/python2.7/weakref.pyR % s c C sU g } xH | j j � D]7 \ } } | � } | d k r | j | | f � q q W| S( N( R R# R R, ( R R- R R! R ( ( s /usr/lib64/python2.7/weakref.pyR# , s c c sG x@ | j j � D]/ \ } } | � } | d k r | | f Vq q Wd S( N( R R/ R ( R R R! R ( ( s /usr/lib64/python2.7/weakref.pyR/ 4 s c C s | j j � S( s� Return an iterator that yields the weak references to the keys. The references are not guaranteed to be 'live' at the time they are used, so the result of calling the references needs to be checked before being used. This can be used to avoid creating references that will cause the garbage collector to keep the keys around longer than needed. ( R R0 ( R ( ( s /usr/lib64/python2.7/weakref.pyt iterkeyrefs: s c c s; x4 | j j � D]# } | � } | d k r | Vq q Wd S( N( R R0 R ( R R R3 ( ( s /usr/lib64/python2.7/weakref.pyR0 F s c C s | j � S( N( R0 ( R ( ( s /usr/lib64/python2.7/weakref.pyR1 L s c C s | j j � S( N( R R. ( R ( ( s /usr/lib64/python2.7/weakref.pyR. O s c C s | j j � S( sz Return a list of weak references to the keys. The references are not guaranteed to be 'live' at the time they are used, so the result of calling the references needs to be checked before being used. This can be used to avoid creating references that will cause the garbage collector to keep the keys around longer than needed. ( R t keys( R ( ( s /usr/lib64/python2.7/weakref.pyt keyrefsR s c C sI g } x< | j j � D]+ } | � } | d k r | j | � q q W| S( N( R RM R R, ( R R- R R ( ( s /usr/lib64/python2.7/weakref.pyRM ^ s c C s> x7 | j j � \ } } | � } | d k r | | f Sq d S( N( R R4 R ( R R R! R ( ( s /usr/lib64/python2.7/weakref.pyR4 f s c G s | j j t | � | � S( N( R R5 R ( R R R ( ( s /usr/lib64/python2.7/weakref.pyR5 m s c C s | j j t | | j � | � S( N( R R6 R R ( R R R* ( ( s /usr/lib64/python2.7/weakref.pyR6 p s c K s� | j } | d k ro t | d � s9 t i � | � } n x3 | j � D]" \ } } | | t | | j � <qF Wn t | � r� | j | � n d S( NR# ( R R R7 R8 R# R R R9 R: ( R R; R< R= R R! ( ( s /usr/lib64/python2.7/weakref.pyR: s s N( R@ RA RB R R RJ R R R" R% RC R) R+ R R R# R/ RL R0 R1 R. RN RM R4 R5 R6 R: ( ( ( s /usr/lib64/python2.7/weakref.pyR � s0 ( RB R t _weakrefR R R R R R R t _weakrefsetR t exceptionsR R t __all__R R R ( ( ( s /usr/lib64/python2.7/weakref.pyt <module> s 4 �