Whats New in 0.24.2 (March 12, 2019)

Warning

The 0.24.x series of releases will be the last to support Python 2. Future feature releases will support Python 3 only. See Plan for dropping Python 2.7 for more.

These are the changes in pandas 0.24.2. See Release Notes for a full changelog including other versions of pandas.

Fixed Regressions

• Fixed regression in DataFrame.all() and DataFrame.any() where bool_only=True was ignored (GH25101)
• Fixed issue in DataFrame construction with passing a mixed list of mixed types could segfault. (GH25075)
• Fixed regression in DataFrame.apply() causing RecursionError when dict-like classes were passed as argument. (GH25196)
• Fixed regression in DataFrame.replace() where regex=True was only replacing patterns matching the start of the string (GH25259)
• Fixed regression in DataFrame.duplicated(), where empty dataframe was not returning a boolean dtyped Series. (GH25184)
• Fixed regression in Series.min() and Series.max() where numeric_only=True was ignored when the Series contained Categorical data (GH25299)
• Fixed regression in subtraction between Series objects with datetime64[ns] dtype incorrectly raising OverflowError when the Series on the right contains null values (GH25317)
• Fixed regression in TimedeltaIndex where np.sum(index) incorrectly returned a zero-dimensional object instead of a scalar (GH25282)
• Fixed regression in IntervalDtype construction where passing an incorrect string with ‘Interval’ as a prefix could result in a RecursionError. (GH25338)
• Fixed regression in creating a period-dtype array from a read-only NumPy array of period objects. (GH25403)
• Fixed regression in Categorical, where constructing it from a categorical Series and an explicit categories= that differed from that in the Series created an invalid object which could trigger segfaults. (GH25318)
• Fixed regression in to_timedelta() losing precision when converting floating data to Timedelta data (GH25077).
• Fixed pip installing from source into an environment without NumPy (GH25193)
• Fixed regression in DataFrame.replace() where large strings of numbers would be coerced into int64, causing an OverflowError (GH25616)
• Fixed regression in factorize() when passing a custom na_sentinel value with sort=True (GH25409).
• Fixed regression in DataFrame.to_csv() writing duplicate line endings with gzip compress (GH25311)

Bug Fixes

I/O

• Better handling of terminal printing when the terminal dimensions are not known (GH25080)
• Bug in reading a HDF5 table-format DataFrame created in Python 2, in Python 3 (GH24925)
• Bug in reading a JSON with orient='table' generated by DataFrame.to_json() with index=False (GH25170)
• Bug where float indexes could have misaligned values when printing (GH25061)

Reshaping

• Bug in transform() where applying a function to a timezone aware column would return a timezone naive result (GH24198)
• Bug in DataFrame.join() when joining on a timezone aware DatetimeIndex (GH23931)

Visualization

• Bug in Series.plot() where a secondary y axis could not be set to log scale (GH25545)

Other

• Bug in Series.is_unique() where single occurrences of NaN were not considered unique (GH25180)
• Bug in merge() when merging an empty DataFrame with an Int64 column or a non-empty DataFrame with an Int64 column that is all NaN (GH25183)
• Bug in IntervalTree where a RecursionError occurs upon construction due to an overflow when adding endpoints, which also causes IntervalIndex to crash during indexing operations (GH25485)
• Bug in Series.size raising for some extension-array-backed Series, rather than returning the size (GH25580)
• Bug in resampling raising for nullable integer-dtype columns (GH25580)

Contributors

A total of 25 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.

• Albert Villanova del Moral
• Arno Veenstra +
• chris-b1
• Devin Petersohn +
• EternalLearner42 +
• Flavien Lambert +
• gfyoung
• Gioia Ballin
• jbrockmendel
• Jeff Reback
• Jeremy Schendel
• Johan von Forstner +
• Joris Van den Bossche
• Josh
• Justin Zheng
• Kendall Masse
• Matthew Roeschke
• Max Bolingbroke +
• rbenes +
• Sterling Paramore +
• Tao He +
• Thomas A Caswell
• Tom Augspurger
• Vibhu Agarwal +
• William Ayd
• Zach Angell