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Posted to issues@beam.apache.org by "Udi Meiri (Jira)" <ji...@apache.org> on 2021/03/31 18:41:00 UTC
[jira] [Updated] (BEAM-10690) Python type hints: support
constrained TypeVars
[ https://issues.apache.org/jira/browse/BEAM-10690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Udi Meiri updated BEAM-10690:
-----------------------------
Status: Open (was: Triage Needed)
> Python type hints: support constrained TypeVars
> -----------------------------------------------
>
> Key: BEAM-10690
> URL: https://issues.apache.org/jira/browse/BEAM-10690
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Udi Meiri
> Priority: P3
> Labels: types
>
> 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.
> {code}
> AnyStr = TypeVar('AnyStr', Text, bytes)
> {code}
> See: https://www.python.org/dev/peps/pep-0484/#generics (lots of cases to check)
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