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)


  • 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).


  • 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)


  • 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)


  • 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)


  • 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)


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


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 +