Version 0.20.3 (July 7, 2017)#

This is a minor bug-fix release in the 0.20.x series and includes some small regression fixes and bug fixes. We recommend that all users upgrade to this version.

Bug fixes#

  • Fixed a bug in failing to compute rolling computations of a column-MultiIndexed DataFrame (GH 16789, GH 16825)

  • Fixed a pytest marker failing downstream packages’ tests suites (GH 16680)

Conversion#

  • Bug in pickle compat prior to the v0.20.x series, when UTC is a timezone in a Series/DataFrame/Index (GH 16608)

  • Bug in Series construction when passing a Series with dtype='category' (GH 16524).

  • Bug in DataFrame.astype() when passing a Series as the dtype kwarg. (GH 16717).

Indexing#

  • Bug in Float64Index causing an empty array instead of None to be returned from .get(np.nan) on a Series whose index did not contain any NaN s (GH 8569)

  • Bug in MultiIndex.isin causing an error when passing an empty iterable (GH 16777)

  • Fixed a bug in a slicing DataFrame/Series that have a TimedeltaIndex (GH 16637)

IO#

  • Bug in read_csv() in which files weren’t opened as binary files by the C engine on Windows, causing EOF characters mid-field, which would fail (GH 16039, GH 16559, GH 16675)

  • Bug in read_hdf() in which reading a Series saved to an HDF file in ‘fixed’ format fails when an explicit mode='r' argument is supplied (GH 16583)

  • Bug in DataFrame.to_latex() where bold_rows was wrongly specified to be True by default, whereas in reality row labels remained non-bold whatever parameter provided. (GH 16707)

  • Fixed an issue with DataFrame.style() where generated element ids were not unique (GH 16780)

  • Fixed loading a DataFrame with a PeriodIndex, from a format='fixed' HDFStore, in Python 3, that was written in Python 2 (GH 16781)

Plotting#

  • Fixed regression that prevented RGB and RGBA tuples from being used as color arguments (GH 16233)

  • Fixed an issue with DataFrame.plot.scatter() that incorrectly raised a KeyError when categorical data is used for plotting (GH 16199)

Reshaping#

  • PeriodIndex / TimedeltaIndex.join was missing the sort= kwarg (GH 16541)

  • Bug in joining on a MultiIndex with a category dtype for a level (GH 16627).

  • Bug in merge() when merging/joining with multiple categorical columns (GH 16767)

Categorical#

  • Bug in DataFrame.sort_values not respecting the kind parameter with categorical data (GH 16793)

Contributors#

For contributors, please see /usr/share/doc/contributors_list.txt or https://github.com/pandas-dev/pandas/graphs/contributors