Regression in loc.setitem losing mi names when df is empty #46322
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phofl
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thanks @phofl |
meeseeksmachine
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Mar 11, 2022
…es when df is empty
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@meeseeksdev backport 1.4.x |
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Something went wrong ... Please have a look at my logs. |
jreback
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Mar 12, 2022
… is empty (#46334) Co-authored-by: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
| - Fixed regression in :meth:`DataFrame.drop` and :meth:`Series.drop` when :class:`Index` had extension dtype and duplicates (:issue:`45860`) | ||
| - Fixed memory performance regression in :meth:`Series.fillna` when called on a :class:`DataFrame` column with ``inplace=True`` (:issue:`46149`) | ||
| - Provided an alternative solution for passing custom Excel formats in :meth:`.Styler.to_excel`, which was a regression based on stricter CSS validation. Examples available in the documentation for :meth:`.Styler.format` (:issue:`46152`) | ||
| - Fixed regression in :meth:`DataFrame.loc.__setitem__` losing :class:`MultiIndex` names if :class:`DataFrame` was empty before (:issue:`46317`) |
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:meth:DataFrame.loc.__setitem__ not a valid ref. will change in a release note tidy up
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What would be valid here? (For future references)
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in 1.4.1 release notes https://pandas.pydata.org/pandas-docs/dev/whatsnew/v1.4.1.html#fixed-regressions , I changed it to
Regression when setting values with DataFrame.loc() losing Index name if DataFrame was empty before (GH45621)
will probably do similar
yehoshuadimarsky
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Jul 13, 2022
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.