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Posted to issues@arrow.apache.org by "jbrockmendel (via GitHub)" <gi...@apache.org> on 2023/03/16 03:34:42 UTC
[GitHub] [arrow] jbrockmendel opened a new issue, #34579: DOC: TableGroupBy.aggregate options
jbrockmendel opened a new issue, #34579:
URL: https://github.com/apache/arrow/issues/34579
### Describe the bug, including details regarding any error messages, version, and platform.
Context: trying to figure out what it would take to let pandas dispatch to pyarrow's groupby machinery.
Most of the relevant methods we would want to dispatch are reduction-like, which maps onto TableGroupBy.aggregate. The only docs I see are https://arrow.apache.org/docs/python/generated/pyarrow.TableGroupBy.html#pyarrow.TableGroupBy.aggregate which says `aggregate` takes "List of tuples made of aggregation column names followed by function names and optionally aggregation function option"
It is not clear to me what "function names" are available. The only example I see is "sum".
It is also not clear what can be done with FunctionOptions.
### Component(s)
Python
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[GitHub] [arrow] jorisvandenbossche closed issue #34579: [Python][Docs] TableGroupBy.aggregate options
Posted by "jorisvandenbossche (via GitHub)" <gi...@apache.org>.
jorisvandenbossche closed issue #34579: [Python][Docs] TableGroupBy.aggregate options
URL: https://github.com/apache/arrow/issues/34579
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[GitHub] [arrow] westonpace commented on issue #34579: DOC: TableGroupBy.aggregate options
Posted by "westonpace (via GitHub)" <gi...@apache.org>.
westonpace commented on issue #34579:
URL: https://github.com/apache/arrow/issues/34579#issuecomment-1471280041
We should probably include a link to https://arrow.apache.org/docs/python/compute.html#grouped-aggregations if we can. That section describes this pretty well.
> It is also not clear what can be done with FunctionOptions.
Each function will potentially have its own options (though all of the aggregate functions share https://arrow.apache.org/docs/python/generated/pyarrow.compute.ScalarAggregateOptions.html#pyarrow.compute.ScalarAggregateOptions). This is documented further in the above link as well.
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[GitHub] [arrow] jbrockmendel commented on issue #34579: [Python][Docs] TableGroupBy.aggregate options
Posted by "jbrockmendel (via GitHub)" <gi...@apache.org>.
jbrockmendel commented on issue #34579:
URL: https://github.com/apache/arrow/issues/34579#issuecomment-1472223452
This is very helpful thank you.
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