What's new in 2.1.2 (October ??, 2023)

These are the changes in pandas 2.1.2. See :ref:`release` for a full changelog including other versions of pandas.

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Fixed regressions

Bug fixes

Other

Changed the FutureWarning raised when observed=False in :meth:`DataFrame.groupby` and :meth:`Series.groupby` to a DeprecationWarning (:issue:`54970`)

Contributors