Allow DataFrame.aggregate to accept None for no grouping#1581
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…y list - Updated `group_by` method to accept `None` and normalize it to an empty list. - Improved docstring for clarity. - Added regression test in `test_dataframe.py` to verify that `None` equals an empty list. - Updated documentation to mention that `group_by=None` is now supported.
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Which issue does this PR close?
Rationale for this change
This makes
DataFrame.aggregateacceptNoneas a more Pythonic way to express aggregation over the whole DataFrame without grouping, equivalent to passing an empty list.What changes are included in this PR?
DataFrame.aggregateto allowgroup_by=None.Nonethe same as an emptygroup_bylist.aggregatedocstring examples and user guide documentation to mentionNone.Are these changes tested?
Yes. This PR adds:
test_aggregate_none_group_by_equivalent_to_empty_listAre there any user-facing changes?
Yes. Users can now call:
as an alternative to:
This is not a breaking API change.
LLM-generated code disclosure
This PR includes code, comments generated with assistance from LLM. All LLM-generated content has been manually reviewed and tested.