BUG: error when unstacking in DataFrameGroupby.apply #52446
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rhshadrach
reviewed
Apr 5, 2023
doc/source/whatsnew/v2.1.0.rst
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| @@ -295,6 +295,7 @@ Groupby/resample/rolling | |||
| or :class:`PeriodIndex`, and the ``groupby`` method was given a function as its first argument, | |||
| the function operated on the whole index rather than each element of the index. (:issue:`51979`) | |||
| - Bug in :meth:`GroupBy.var` failing to raise ``TypeError`` when called with datetime64 or :class:`PeriodDtype` values (:issue:`52128`) | |||
| - Bug in :meth:`DataFrameGroupBy.apply` when the supplied callable unstacked the grouped :class:`DataFrame` and returned a :class:`Series`, an attempt was made to set a list as the name of the result ``Series``, causing an error to be raised (:issue:`52444`) | |||
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I think this bug occurs a bit more generally - anytime the input DataFrame is subset as a DataFrame after groupby ([['a']] and not ['a']) and the UDF returns Series that aren't all indexed the same.
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I’ve reformulated.
mroeschke
approved these changes
Apr 6, 2023
|
Thanks @topper-123 |
topper-123
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Apr 6, 2023
* BUG: error when unstacking in DataFrameGroupby.apply * fix pre-commit * adjust whatsnew for comments
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.