v0.20.3 (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 (GH16789, GH16825)
• Fixed a pytest marker failing downstream packages’ tests suites (GH16680)

Conversion

• Bug in pickle compat prior to the v0.20.x series, when UTC is a timezone in a Series/DataFrame/Index (GH16608)
• Bug in Series construction when passing a Series with dtype='category' (GH16524).
• Bug in DataFrame.astype() when passing a Series as the dtype kwarg. (GH16717).

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 (GH8569)
• Bug in MultiIndex.isin causing an error when passing an empty iterable (GH16777)
• Fixed a bug in a slicing DataFrame/Series that have a TimedeltaIndex (GH16637)

I/O

• 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 (GH16039, GH16559, GH16675)
• 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 (GH16583)
• 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. (GH16707)
• Fixed an issue with DataFrame.style() where generated element ids were not unique (GH16780)
• Fixed loading a DataFrame with a PeriodIndex, from a format='fixed' HDFStore, in Python 3, that was written in Python 2 (GH16781)

Plotting

• Fixed regression that prevented RGB and RGBA tuples from being used as color arguments (GH16233)
• Fixed an issue with DataFrame.plot.scatter() that incorrectly raised a KeyError when categorical data is used for plotting (GH16199)

Reshaping

• PeriodIndex / TimedeltaIndex.join was missing the sort= kwarg (GH16541)
• Bug in joining on a MultiIndex with a category dtype for a level (GH16627).
• Bug in merge() when merging/joining with multiple categorical columns (GH16767)

Categorical

• Bug in DataFrame.sort_values not respecting the kind parameter with categorical data (GH16793)

Contributors

A total of 20 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.

• Bran Yang
• Chris
• Chris Kerr +
• DSM
• David Gwynne
• Douglas Rudd
• Forbidden Donut +
• Jeff Reback
• Joris Van den Bossche
• Karel De Brabandere +
• Peter Quackenbush +
• Pradyumna Reddy Chinthala +
• Telt +
• Tom Augspurger
• chris-b1
• gfyoung
• ian +
• jdeschenes +
• kjford +
• ri938 +