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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/11/09 07:42:57 UTC

[GitHub] [beam] ronshapiro opened a new issue, #24052: [Bug]: collections.abc.Iterable[T] is rejected as a typehint

ronshapiro opened a new issue, #24052:
URL: https://github.com/apache/beam/issues/24052

   ### What happened?
   
   Trying to use typing.Iterable[T] in Beam code works fine, but collections.abc.Iterable[T] does not. 
   
   I imagine that the special casing of the typing module should be extended to collections.abc as well.
   
   
   ```python
   print(typehints.is_consistent_with(Iterable[str], Iterable[Any]))
   > True
   print(typehints.is_consistent_with(collections.abc.Iterable[str], Iterable[Any]))
   > False
   print(typehints.is_consistent_with(collections.abc.Iterable[str], collections.abc.Iterable[Any]))
   > TypeError: issubclass() argument 2 cannot be a parameterized generic
   ```
   
   ### Issue Priority
   
   Priority: 2
   
   ### Issue Component
   
   Component: sdk-py-core


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[GitHub] [beam] davidcavazos commented on issue #24052: [Improvement]: accept collections.abc.Iterable[T] as a type hint

Posted by "davidcavazos (via GitHub)" <gi...@apache.org>.
davidcavazos commented on issue #24052:
URL: https://github.com/apache/beam/issues/24052#issuecomment-1426449568

   As part of [PEP-585](https://peps.python.org/pep-0585), Python is now standardizing all type hinting annotations into the `collections` library rather than the `typing` library, starting from Python 3.9. [Here's a list of all the standard generic types](https://peps.python.org/pep-0585/#implementation).
   
   **Workaround:**
   
   ```py
   from __future__ import annotations
   ```


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[GitHub] [beam] kennknowles commented on issue #24052: [Bug]: collections.abc.Iterable[T] is rejected as a typehint

Posted by GitBox <gi...@apache.org>.
kennknowles commented on issue #24052:
URL: https://github.com/apache/beam/issues/24052#issuecomment-1314365561

   CC @tvalentyn @robertwb 


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