[issue38878] os.PathLike subclasshook causes subclass checks true on abstract implementation

[Ammar Askar]

Ammar Askar <ammar at ammaraskar.com> added the comment:

Just for reference/existing behavior:

>>> class A(collections.abc.Iterable): pass
...
>>> class B:
...   def __iter__(): pass
...
>>> issubclass(B, A)
False
>>> issubclass(B, collections.abc.Iterable)
True
>>> issubclass(A, collections.abc.Iterable)
True

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nosy: +ammar2

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38878>
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