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Posted to issues@beam.apache.org by "Brian Hulette (Jira)" <ji...@apache.org> on 2021/01/28 21:20:00 UTC

[jira] [Created] (BEAM-11710) groupby cannot aggregate grouped column

Brian Hulette created BEAM-11710:
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             Summary: 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
            Reporter: Brian Hulette
            Assignee: Brian Hulette


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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