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v0.23.1.txt
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.. _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
~~~~~~~~~~~~
- :meth:`Index.droplevel` is now implemented also for flat indexes, for compatibility with MultiIndex (:issue:`21115`)
- :func:`to_datetime` now supports the ``%Z`` and ``%z`` directive when passed into ``format`` (:issue:`13486`)
.. _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
~~~~~~~~~
- tab completion on :class:`Index` in IPython no longer outputs deprecation warnings (:issue:`21125`)
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`)
Strings
^^^^^^^
- Bug in :meth:`Series.str.replace()` where the method throws `TypeError` on Python 3.5.2 (:issue: `21078`)
Timedelta
^^^^^^^^^
- Bug in :class:`Timedelta`: where passing a float with a unit would prematurely round the float precision (:issue: `14156`)
Categorical
^^^^^^^^^^^
- Bug in :func:`pandas.util.testing.assert_index_equal` which raised ``AssertionError`` incorrectly, when comparing two :class:`CategoricalIndex` objects with param ``check_categorical=False`` (:issue:`19776`)
Conversion
^^^^^^^^^^
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Indexing
^^^^^^^^
- Bug in :meth:`Series.reset_index` where appropriate error was not raised with an invalid level name (:issue:`20925`)
- Bug in :func:`interval_range` when ``start``/``periods`` or ``end``/``periods`` are specified with float ``start`` or ``end`` (:issue:`21161`)
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I/O
^^^
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Plotting
^^^^^^^^
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Reshaping
^^^^^^^^^
- Bug in :func:`concat` where error was raised in concatenating :class:`Series` with numpy scalar and tuple names (:issue:`21015`)
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Categorical
^^^^^^^^^^^
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