typing _SpecialForm backwards-incompat py39 change

Question

typing _SpecialForm backwards-incompat py39 change

dmyersturnbull opened this issue 4 years ago · comments

Douglas Myers-Turnbull commented 4 years ago

/opt/hostedtoolcache/Python/3.9.1/x64/lib/python3.9/typing.py:694: in __setattr__
    setattr(self.__origin__, attr, val)
E   AttributeError: '_SpecialForm' object has no attribute 'isinstance'

OS name and version: ubuntu-latest
Project version: 0.4.1