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i Z i Z i Z d d � Z d d � Z d d � Z d S)z�Helper to provide extensibility for pickle.
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__newobj__W s r. c C s | j | | | � S)zUsed by pickle protocol 4, instead of __newobj__ to allow classes with
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Wn Yn X| S) a� Return a list of slot names for a given class.
This needs to find slots defined by the class and its bases, so we
can't simply return the __slots__ attribute. We must walk down
the Method Resolution Order and concatenate the __slots__ of each
class found there. (This assumes classes don't modify their
__slots__ attribute to misrepresent their slots after the class is
defined.)
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c C sq | | f } t j | � | k s6 t j | � | k rL t d | | f � � t | =t | =| t k rm t | =d S)z0Unregister an extension code. For testing only.z%key %s is not registered with code %sN)r@ r4 rA r? �_extension_cache)rB r< rC rD r r r
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