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

Fixed bug in :meth:`DataFrame.resample` where bin edges were not correct for :class:`~pandas.tseries.offsets.MonthBegin` (:issue:`55271`)
Fixed bug where PDEP-6 warning about setting an item of an incompatible dtype was being shown when creating a new conditional column (:issue:`55025`)

Bug fixes

Fixed bug in :meth:`DataFrame.resample` not respecting closed and label arguments for :class:`~pandas.tseries.offsets.BusinessDay` (:issue:`55282`)
Fixed bug in :meth:`DataFrame.resample` where bin edges were not correct for :class:`~pandas.tseries.offsets.BusinessDay` (:issue:`55281`)
Silence Period[B] warnings introduced by :issue:`53446` during normal plotting activity (:issue:`55138`)

Other

Fixed non-working installation of optional dependency group output_formatting. Replacing underscore _ with a dash - fixes broken dependency resolution. A correct way to use now is pip install pandas[output-formatting].

Contributors