v0.23.2.txt

.. _whatsnew_0232:

v0.23.2
-------

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 v0.23.2
    :local:
    :backlinks: none


.. _whatsnew_0232.fixed_regressions:

Fixed Regressions
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.. _whatsnew_0232.performance:

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

- Improved performance of membership checks in :class:`CategoricalIndex`
  (i.e. ``x in ci``-style checks are much faster). :meth:`CategoricalIndex.contains`
  is likewise much faster (:issue:`21369`)
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Documentation Changes
~~~~~~~~~~~~~~~~~~~~~

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.. _whatsnew_0232.bug_fixes:

Bug Fixes
~~~~~~~~~

**Groupby/Resample/Rolling**

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**Conversion**


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**Indexing**

- Bug in :meth:`Index.get_indexer_non_unique` with categorical key (:issue:`21448`)
- Bug in comparison operations for :class:`MultiIndex` where error was raised on equality / inequality comparison involving a MultiIndex with ``nlevels == 1`` (:issue:`21149`)
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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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**Timezones**
- Bug in :class:`Timestamp` and :class:`DatetimeIndex` where passing a :class:`Timestamp` localized after a DST transition would return a datetime before the DST transition (:issue:`20854`)
- Bug in comparing :class:`DataFrame`s with tz-aware :class:`DatetimeIndex` columns with a DST transition that raised a ``KeyError`` (:issue:`19970`)

**Other**

- Bug in :meth:`Series.nlargest` for signed and unsigned integer dtypes when the minimum value is present (:issue:`21426`)
- Bug in :class:`_Concatenator` should not sort Ordered Dictionaries (:issue:`21510`)
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