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bpo-45755: [typing] Reveal class attributes of generic in generic aliases in dir() (GH-29962)

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Ken Jin 2021-12-16 22:29:59 +08:00 • committed by GitHub
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Lib/typing.py
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@ -991,6 +991,9 @@ class _BaseGenericAlias(_Final, _root=True):
raise TypeError("Subscripted generics cannot be used with"
" class and instance checks")
def __dir__(self):
return list(set(super().__dir__()
+ [attr for attr in dir(self.__origin__) if not _is_dunder(attr)]))
# Special typing constructs Union, Optional, Generic, Callable and Tuple
# use three special attributes for internal bookkeeping of generic types: