What’s new in 2.3.0 (Month XX, 2024)

These are the changes in pandas 2.3.0. See Release notes for a full changelog including other versions of pandas.

Upcoming changes in pandas 3.0

Enhancements

enhancement1

Other enhancements

• The semantics for the copy keyword in __array__ methods (i.e. called when using np.array() or np.asarray() on pandas objects) has been updated to work correctly with NumPy >= 2 (GH 57739)

• The sum() reduction is now implemented for StringDtype columns (GH 59853)

Notable bug fixes

These are bug fixes that might have notable behavior changes.

notable_bug_fix1

Deprecations

• Deprecated allowing non-bool values for na in str.contains(), str.startswith(), and str.endswith() for dtypes that do not already disallow these (GH 59615)

• Deprecated the "pyarrow_numpy" storage option for StringDtype (GH 60152)

Performance improvements

Bug fixes

Categorical

Datetimelike

Timedelta

Timezones

Numeric

Conversion

Strings

• Bug in Series.rank() for StringDtype with storage="pyarrow" incorrectly returning integer results in case of method="average" and raising an error if it would truncate results (GH 59768)

• Bug in Series.replace() with StringDtype when replacing with a non-string value was not upcasting to object dtype (GH 60282)

• Bug in Series.str.replace() when n < 0 for StringDtype with storage="pyarrow" (GH 59628)

• Bug in ser.str.slice with negative step with ArrowDtype and StringDtype with storage="pyarrow" giving incorrect results (GH 59710)

• Bug in the center method on Series and Index object str accessors with pyarrow-backed dtype not matching the python behavior in corner cases with an odd number of fill characters (GH 54792)

Interval

Indexing

• Fixed bug in Index.get_indexer() round-tripping through string dtype when infer_string is enabled (GH 55834)

Missing

MultiIndex

I/O

• DataFrame.to_excel() was storing decimals as strings instead of numbers (GH 49598)

Period

Plotting

Groupby/resample/rolling

Reshaping

Sparse

ExtensionArray

Styler

Other

• Fixed usage of inspect when the optional dependencies pyarrow or jinja2 are not installed (GH 60196)

Contributors