ABCMeta.subclasshook

abc

classmethod of ABCMeta

ABCMeta.__subclasshook__(subclass)

Abstract classes can override this to customize issubclass().

This is invoked early on by abc.ABCMeta.__subclasscheck__().
It should return True, False or NotImplemented.  If it returns
NotImplemented, the normal algorithm is used.  Otherwise, it
overrides the normal algorithm (and the outcome is cached).

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