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This module is an implementation of PEP 205:
http://www.python.org/dev/peps/pep-0205/
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Entries in the dictionary will be discarded when no strong
reference to the value exists anymore
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u WeakValueDictionary.keysc c s6 t | � �$ x | j j � D] } | Vq WWd QXd S( u� Return an iterator that yields the weak references to the values.
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creating references that will cause the garbage collector to
keep the values around longer than needed.
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c s> | Ee Z d Z d Z d Z d d � Z � f d d � Z � S( u KeyedRefu[ 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.
u keyc C s" t j | | | � } | | _ | S( N( u refu __new__u key( u typeu obu callbacku keyu self( ( u, /opt/alt/python33/lib64/python3.3/weakref.pyu __new__� s u KeyedRef.__new__c s t � j | | � d S( N( u superu __init__( u selfu obu callbacku key( u __class__( u, /opt/alt/python33/lib64/python3.3/weakref.pyu __init__� s u KeyedRef.__init__( u key( u __name__u
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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.
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t | j � S( uz Return a list of weak references to the keys.
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keep the keys around longer than needed.
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