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� Z e d d � � Z e d d � � Z e j d d � � Z d d � Z e d d � � Z e d d � � Z d S)r a Class for finalization of weakrefable objects
finalize(obj, func, *args, **kwargs) returns a callable finalizer
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first time the finalizer is called it evaluates func(*arg, **kwargs)
and returns the result. After this the finalizer is dead, and
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