8000 Protocol parameter invalid in typing_extensions==4.6 · Issue #201 · astropenguin/xarray-dataclasses · GitHub
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Protocol parameter invalid in typing_extensions==4.6 #201

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giovp opened this issue May 23, 2023 · 2 comments
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Protocol parameter invalid in typing_extensions==4.6 #201

giovp opened this issue May 23, 2023 · 2 comments
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@giovp
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giovp commented May 23, 2023

with python 3.10 and typing_extensions 4.6 I get this error

.tox/py310-linux/lib/python3.10/site-packages/xarray_dataclasses/typing.py:74: in <module>
      class DataClass(Protocol[PInit]):
  /opt/hostedtoolcache/Python/3.10.11/x64/lib/python3.10/typing.py:312: in inner
      return func(*args, **kwds)
  .tox/py310-linux/lib/python3.10/site-packages/typing_extensions.py:672: in __class_getitem__
      raise TypeError(
  E   TypeError: Parameters to Protocol[...] must all be type variables. Parameter 1 is ~PInit

referred to this line

xarray-dataclasses/xarray_dataclasses/typing.py

Line 74 in d57fa41

class DataClass(Protocol[PInit]):

@astropenguin astropenguin added the bug Something isn't working label May 29, 2023
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astropenguin commented Jun 2, 2023 •
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Dear @giovp , thank you for reporting this issue. It seems that it is a bug related to typing_extension v4.6.0 (python/typing_extensions#181), not to our side. Now they released the bug-fixed version (v4.6.1) and I confirmed that it works without the error (at least in my environment). So could you try to update typing_extension?

@astropenguin astropenguin self-assigned this Jun 2, 2023
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giovp commented Jun 22, 2023

it works, thanks a lot!

@giovp giovp closed this as completed Jun 22, 2023
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