[jira] [Created] (ARROW-13688) [Python] Expose GroupBy function.

[A. Coady (Jira)]

A. Coady created ARROW-13688:
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             Summary: [Python] Expose GroupBy function.
                 Key: ARROW-13688
                 URL: https://issues.apache.org/jira/browse/ARROW-13688
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
    Affects Versions: 5.0.0
            Reporter: A. Coady


The hash_aggregate functions are in `pyarrow.compute`, but they're not directly 
callable. Looks like GroupBy is unavailable in Python.



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