What’s 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 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)

Categorical

• Bug where calling Series.replace() on categorical data could return a Series with incorrect dimensions (GH24971)

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

What’s new in 0.25.0 (July 18, 2019) What’s new in 0.24.1 (February 3, 2019)