.. _whatsnew_0242: 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. {{ header }} These are the changes in pandas 0.24.2. See :ref:`release` for a full changelog including other versions of pandas. .. _whatsnew_0242.regressions: 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`) .. _whatsnew_0242.bug_fixes: 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`) .. _whatsnew_0242.contributors: Contributors ~~~~~~~~~~~~ .. Including the contributors hardcoded for this release, as backporting with MeeseeksDev loses the commit authors 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