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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2022/06/04 17:13:13 UTC

[GitHub] [beam] damccorm opened a new issue, #20388: Python type hints: support constrained TypeVars

damccorm opened a new issue, #20388:
URL: https://github.com/apache/beam/issues/20388

   Support the following syntax when converting to internal Beam types,
   and raise a TypeCheckError when trying to bind anything that isn't Any, one of the listed types, or a subtype of the listed types.
   
   ```
   
   AnyStr = TypeVar('AnyStr', Text, bytes)
   
   ```
   
   
   See: https://www.python.org/dev/peps/pep-0484/#generics (lots of cases to check)
   
   
   Imported from Jira [BEAM-10690](https://issues.apache.org/jira/browse/BEAM-10690). Original Jira may contain additional context.
   Reported by: udim.


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