v0.23.1.txt

.. _whatsnew_0231:

v0.23.1
-------

This is a minor bug-fix release in the 0.23.x series and includes some small regression fixes
and bug fixes. We recommend that all users upgrade to this version.

.. contents:: What's new in v0.23.1
    :local:
    :backlinks: none

.. _whatsnew_0231.enhancements:

New features
~~~~~~~~~~~~


.. _whatsnew_0231.deprecations:

Deprecations
~~~~~~~~~~~~

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.. _whatsnew_0231.performance:

Performance Improvements
~~~~~~~~~~~~~~~~~~~~~~~~

- Improved performance of :meth:`CategoricalIndex.is_monotonic_increasing`, :meth:`CategoricalIndex.is_monotonic_decreasing` and :meth:`CategoricalIndex.is_monotonic` (:issue:`21025`)
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Documentation Changes
~~~~~~~~~~~~~~~~~~~~~

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.. _whatsnew_0231.bug_fixes:

Bug Fixes
~~~~~~~~~

Groupby/Resample/Rolling
^^^^^^^^^^^^^^^^^^^^^^^^

- Bug in :func:`DataFrame.agg` where applying multiple aggregation functions to a :class:`DataFrame` with duplicated column names would cause a stack overflow (:issue:`21063`)
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Conversion
^^^^^^^^^^

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Indexing
^^^^^^^^

- Bug in :meth:`Series.reset_index` where appropriate error was not raised with a non-named level (:issue:`20925`)
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I/O
^^^

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Plotting
^^^^^^^^

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Reshaping
^^^^^^^^^

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Categorical
^^^^^^^^^^^

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