v0.24.2.rst

orphan:

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 :ref:`install.dropping-27` for more.

{{ header }}

These are the changes in pandas 0.24.2. See :ref:`release` for a full changelog including other versions of pandas.

Fixed Regressions

• Fixed regression in :meth:`DataFrame.all` and :meth:`DataFrame.any` where bool_only=True was ignored (:issue:`25101`)
• Fixed issue in DataFrame construction with passing a mixed list of mixed types could segfault. (:issue:`25075`)
• Fixed regression in :meth:`DataFrame.apply` causing RecursionError when dict-like classes were passed as argument. (:issue:`25196`)
• Fixed regression in :meth:`DataFrame.replace` where regex=True was only replacing patterns matching the start of the string (:issue:`25259`)
• Fixed regression in :meth:`DataFrame.duplicated()`, where empty dataframe was not returning a boolean dtyped Series. (:issue:`25184`)
• Fixed regression in :meth:`Series.min` and :meth:`Series.max` where numeric_only=True was ignored when the Series contained Categorical data (:issue:`25299`)
• Fixed regression in subtraction between :class:`Series` objects with datetime64[ns] dtype incorrectly raising OverflowError when the Series on the right contains null values (:issue:`25317`)
• Fixed regression in :class:`TimedeltaIndex` where np.sum(index) incorrectly returned a zero-dimensional object instead of a scalar (:issue:`25282`)
• Fixed regression in IntervalDtype construction where passing an incorrect string with 'Interval' as a prefix could result in a RecursionError. (:issue:`25338`)
• Fixed regression in creating a period-dtype array from a read-only NumPy array of period objects. (:issue:`25403`)
• Fixed regression in :class:`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. (:issue:`25318`)
• Fixed regression in :func:`to_timedelta` losing precision when converting floating data to Timedelta data (:issue:`25077`).
• Fixed pip installing from source into an environment without NumPy (:issue:`25193`)
• Fixed regression in :meth:`DataFrame.replace` where large strings of numbers would be coerced into int64, causing an OverflowError (:issue:`25616`)
• Fixed regression in :func:`factorize` when passing a custom na_sentinel value with sort=True (:issue:`25409`).
• Fixed regression in :meth:`DataFrame.to_csv` writing duplicate line endings with gzip compress (:issue:`25311`)

Bug Fixes

I/O

• Better handling of terminal printing when the terminal dimensions are not known (:issue:`25080`)
• Bug in reading a HDF5 table-format DataFrame created in Python 2, in Python 3 (:issue:`24925`)
• Bug in reading a JSON with orient='table' generated by :meth:`DataFrame.to_json` with index=False (:issue:`25170`)
• Bug where float indexes could have misaligned values when printing (:issue:`25061`)

Categorical

• Bug where calling :meth:`Series.replace` on categorical data could return a Series with incorrect dimensions (:issue:`24971`)

Reshaping

• Bug in :meth:`~pandas.core.groupby.GroupBy.transform` where applying a function to a timezone aware column would return a timezone naive result (:issue:`24198`)
• Bug in :func:`DataFrame.join` when joining on a timezone aware :class:`DatetimeIndex` (:issue:`23931`)

Visualization

• Bug in :meth:`Series.plot` where a secondary y axis could not be set to log scale (:issue:`25545`)

Other

• Bug in :meth:`Series.is_unique` where single occurrences of NaN were not considered unique (:issue:`25180`)
• Bug in :func:`merge` when merging an empty DataFrame with an Int64 column or a non-empty DataFrame with an Int64 column that is all NaN (:issue:`25183`)
• Bug in IntervalTree where a RecursionError occurs upon construction due to an overflow when adding endpoints, which also causes :class:`IntervalIndex` to crash during indexing operations (:issue:`25485`)
• Bug in :attr:`Series.size` raising for some extension-array-backed Series, rather than returning the size (:issue:`25580`)
• Bug in resampling raising for nullable integer-dtype columns (:issue:`25580`)

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