BUG[string]: incorrect index downcast in DataFrame.join #61771
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doc/source/whatsnew/v3.0.0.rst
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| @@ -865,7 +865,9 @@ Reshaping | |||
| - Bug in :meth:`DataFrame.unstack` producing incorrect results when manipulating empty :class:`DataFrame` with an :class:`ExtentionDtype` (:issue:`59123`) | |||
| - Bug in :meth:`concat` where concatenating DataFrame and Series with ``ignore_index = True`` drops the series name (:issue:`60723`, :issue:`56257`) | |||
| - Bug in :func:`melt` where calling with duplicate column names in ``id_vars`` raised a misleading ``AttributeError`` (:issue:`61475`) | |||
| - Bug in :meth:`DataFrame.join` incorrectly downcasting object-dtype indexes (:issue:`61771`) | |||
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I guess we would want to backport this fix to 2.3.1?
jorisvandenbossche
approved these changes
Jul 7, 2025
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Owee, I'm MrMeeseeks, Look at me. There seem to be a conflict, please backport manually. Here are approximate instructions:
And apply the correct labels and milestones. Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon! Remember to remove the If these instructions are inaccurate, feel free to suggest an improvement. |
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Thanks @jbrockmendel! |
jorisvandenbossche
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Jul 7, 2025
…1771) Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>
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Manual backport -> #61800 |
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.