What’s new in 3.0.1 (February XX, 2026)#

These are the changes in pandas 3.0.1. See Release notes for a full changelog including other versions of pandas.

Fixed regressions#

Fixed regression in to_timedelta() when converting a list with float and int (GH 64044)
Fixed regression in DataFrame.groupby() and Series.groupby() when grouping on categorical data with NA values, observed=False, and dropna=True (GH 52445)
Fixed regression in DataFrame.reindex() when using a string fill value (GH 63993)
Fixed regression in the DataFrame and DataFrame.from_records() constructor with a list of dicts with a missing value indicator as key (GH 63889)
Fixed regression when calling numpy.random’s permutation() on a (pyarrow-backed) string Series (GH 63935)

Fixed a bug for comparison operators between range and objects with StringDtype with storage="pyarrow" (GH 63429)
Fixed a bug in the DataFrame constructor when passed a Series or Index correctly handling Copy-on-Write (GH 63899)
Allow ExtensionArray to have dtypes involving numpy.void (GH 54810)
Fixed a bug in col() where unary operators (-, +, abs) were not supported (GH 63939)
Fixed a bug in the comparison_op() raising a TypeError for zerodim subclasses of np.ndarray (GH 63205)
Added additional typing aliases in pandas.api.typing.aliases (GH 64098)
Fixed thread safety issues in DataFrame internals on the free-threaded build (GH 63685).
Prevent buffer overflow in Rolling.corr() and Rolling.cov() with variable windows when passing other with a longer index than the original window. This now raises ValueError (GH 62937)