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v0.20.2.txt
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.. _whatsnew_0202:
v0.20.2 (???)
-------------
This is a minor bug-fix release in the 0.20.x series and includes some small regression fixes,
bug fixes and performance improvements.
We recommend that all users upgrade to this version.
Highlights include:
.. contents:: What's new in v0.20.2
:local:
:backlinks: none
.. _whatsnew_0202.enhancements:
Enhancements
~~~~~~~~~~~~
- Unblocked access to additional compression types supported in pytables: 'blosc:blosclz, 'blosc:lz4', 'blosc:lz4hc', 'blosc:snappy', 'blosc:zlib', 'blosc:zstd' (:issue:`14478`)
.. _whatsnew_0202.performance:
Performance Improvements
~~~~~~~~~~~~~~~~~~~~~~~~
- Performance regression fix when indexing with a list-like (:issue:`16285`)
- Performance regression fix for MultiIndexes (:issue:`16319`, :issue:`16346`)
- Improved performance of ``.clip()`` with scalar arguments (:issue:`15400`)
- Improved performance of groupby with categorical groupers (:issue:`16413`)
.. _whatsnew_0202.bug_fixes:
Bug Fixes
~~~~~~~~~
- Bug in using ``pathlib.Path`` or ``py.path.local`` objects with io functions (:issue:`16291`)
Conversion
^^^^^^^^^^
- Bug in ``pd.to_numeric()`` in which empty data inputs were causing Python to crash (:issue:`16302`)
Indexing
^^^^^^^^
- Bug in ``DataFrame.reset_index(level=)`` with single level index (:issue:`16263`)
I/O
^^^
- Bug that would force importing of the clipboard routines unnecessarily, potentially causing an import error on startup (:issue:`16288`)
Plotting
^^^^^^^^
- Bug in ``DataFrame.plot`` with a single column and a list-like ``color`` (:issue:`3486`)
- Bug in ``plot`` where ``NaT`` in ``DatetimeIndex`` results in ``Timestamp.min`` (:issue: `12405`)
Groupby/Resample/Rolling
^^^^^^^^^^^^^^^^^^^^^^^^
Sparse
^^^^^^
- Bug in construction of SparseDataFrame from ``scipy.sparse.dok_matrix`` (:issue:`16179`)
Reshaping
^^^^^^^^^
- Bug in ``DataFrame.stack`` with unsorted levels in MultiIndex columns (:issue:`16323`)
Numeric
^^^^^^^
Categorical
^^^^^^^^^^^
- Fixed comparison operations considering the order of the categories when both categoricals are unordered (:issue:`16014`)
Other
^^^^^
- Bug in ``pd.drop([])`` for DataFrame with non-unique indices (:issue:`16270`)