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https://issues.apache.org/jira/browse/BEAM-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Udi Meiri resolved BEAM-8492.
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Fix Version/s: 2.20.0
Resolution: Fixed
> Python typehints: don't try to strip_iterable from None
> -------------------------------------------------------
>
> Key: BEAM-8492
> URL: https://issues.apache.org/jira/browse/BEAM-8492
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Udi Meiri
> Assignee: Udi Meiri
> Priority: Major
> Fix For: 2.20.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> The return value of DoFn.process can be an iterable of elements or None.
> Handle the case when the output type hint of process is None.
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