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https://issues.apache.org/jira/browse/BEAM-11710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17340325#comment-17340325
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Beam JIRA Bot commented on BEAM-11710:
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This issue is P2 but has been unassigned without any comment for 60 days so it
has been labeled "stale-P2". If this issue is still affecting you, we care!
Please comment and remove the label. Otherwise, in 14 days the issue will be
moved to P3.
Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed
explanation of what these priorities mean.
> groupby cannot aggregate grouped column
> ---------------------------------------
>
> Key: BEAM-11710
> URL: https://issues.apache.org/jira/browse/BEAM-11710
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Affects Versions: 2.26.0, 2.27.0, 2.28.0
> Reporter: Brian Hulette
> Priority: P2
> Labels: dataframe-api, stale-P2
>
> pandas allows you to aggregate on the same column that you are grouping on.
> Attempting this in the Beam implementation results in an error.
> df.groupby('group')[['group', 'foo']].count()
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