Jared Deckard <jared@shademaps.com> added the comment: typing_inspect is now filled with python version checks for 3.7. The implementation got significantly more complex when differentiating generics at runtime. 3.6 was undocumented, but the OO API was intuitive:
T = typing.Union[int, float] assert T.__class__ == typing.Union assert T.__args__ == (int, float)
3.7 is less convenient and less consistent:
T = typing.Union[int, float] assert T.__class__ == typing._GenericAlias assert T.__origin__ == typing.Union L = typing.List[int] assert L.__class__ == typing._GenericAlias assert L.__origin__ == list
---------- nosy: +Jared Deckard _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue32752> _______________________________________