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# 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 (GH 25101)

- Fixed issue in `DataFrame` construction with passing a mixed list of mixed types could segfault. (GH 25075)

- Fixed regression in `DataFrame.apply()` causing `RecursionError` when `dict`-like classes were passed as argument. (GH 25196)

- Fixed regression in `DataFrame.replace()` where `regex=True` was only replacing patterns matching the start of the string (GH 25259)

- Fixed regression in `DataFrame.duplicated()`, where empty dataframe was not returning a boolean dtyped Series. (GH 25184)

- Fixed regression in `Series.min()` and `Series.max()` where `numeric_only=True` was ignored when the `Series` contained `Categorical` data (GH 25299)

- Fixed regression in subtraction between `Series` objects with `datetime64[ns]` dtype incorrectly raising `OverflowError` when the `Series` on the right contains null values (GH 25317)

- Fixed regression in `TimedeltaIndex` where `np.sum(index)` incorrectly returned a zero-dimensional object instead of a scalar (GH 25282)

- Fixed regression in `IntervalDtype` construction where passing an incorrect string with ‘Interval’ as a prefix could result in a `RecursionError`. (GH 25338)

- Fixed regression in creating a period-dtype array from a read-only NumPy array of period objects. (GH 25403)

- 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. (GH 25318)

- Fixed regression in `to_timedelta()` losing precision when converting floating data to `Timedelta` data (GH 25077).

- Fixed pip installing from source into an environment without NumPy (GH 25193)

- Fixed regression in `DataFrame.replace()` where large strings of numbers would be coerced into `int64`, causing an `OverflowError` (GH 25616)

- Fixed regression in `factorize()` when passing a custom `na_sentinel` value with `sort=True` (GH 25409).

- Fixed regression in `DataFrame.to_csv()` writing duplicate line endings with gzip compress (GH 25311)

## Bug fixes

I/O

- Better handling of terminal printing when the terminal dimensions are not known (GH 25080)

- Bug in reading a HDF5 table-format `DataFrame` created in Python 2, in Python 3 (GH 24925)

- Bug in reading a JSON with `orient='table'` generated by `DataFrame.to_json()` with `index=False` (GH 25170)

- Bug where float indexes could have misaligned values when printing (GH 25061)

Categorical

- Bug where calling `Series.replace()` on categorical data could return a `Series` with incorrect dimensions (GH 24971)

Reshaping

- Bug in `GroupBy.transform()` where applying a function to a timezone aware column would return a timezone naive result (GH 24198)

- Bug in `DataFrame.join()` when joining on a timezone aware `DatetimeIndex` (GH 23931)

Visualization

- Bug in `Series.plot()` where a secondary y axis could not be set to log scale (GH 25545)

Other

- Bug in `Series.is_unique()` where single occurrences of `NaN` were not considered unique (GH 25180)

- 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` (GH 25183)

- 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 (GH 25485)

- Bug in `Series.size` raising for some extension-array-backed `Series`, rather than returning the size (GH 25580)

- Bug in resampling raising for nullable integer-dtype columns (GH 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