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https://issues.apache.org/jira/browse/BEAM-12717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549438#comment-17549438
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Danny McCormick commented on BEAM-12717:
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This issue has been migrated to https://github.com/apache/beam/issues/21034
> datetime.date not working with Distinct()
> -----------------------------------------
>
> Key: BEAM-12717
> URL: https://issues.apache.org/jira/browse/BEAM-12717
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Affects Versions: 2.31.0
> Reporter: Sebastian Kretzig
> Priority: P3
> Labels: types
>
> I was using 2.28.0 and running a standard Distinct on a PColl of
> datetime.dates without problems.
> After upgrading to 2.31.0, I'm getting this error:
> TypeError: Unable to deterministically encode '2020-12-02' of type '<class
> 'datetime.date'>', please provide a type hint for the input of 'Get the
> unique dates from prices/Group/GroupByKey' [while running 'Get the unique
> dates from prices/ToPairs']
> Had convert the date to str and back to date after running the Distinct() to
> preserve the date type. Any clues?
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