What’s new in 2.1.2 (October 26, 2023)#
These are the changes in pandas 2.1.2. See Release notes for a full changelog including other versions of pandas.
Deprecations#
Reverted deprecation of
fill_method=None
inDataFrame.pct_change()
,Series.pct_change()
,DataFrameGroupBy.pct_change()
, andSeriesGroupBy.pct_change()
; the values'backfill'
,'bfill'
,'pad'
, and'ffill'
are still deprecated (GH 53491)
Fixed regressions#
Fixed regression in
DataFrame.join()
where result has missing values and dtype is arrow backed string (GH 55348)Fixed regression in
rolling()
where non-nanosecond index oron
column would produce incorrect results (GH 55026, GH 55106, GH 55299)Fixed regression in
DataFrame.resample()
which was extrapolating back toorigin
whenorigin
was outside its bounds (GH 55064)Fixed regression in
DataFrame.sort_index()
which was not sorting correctly when the index was a slicedMultiIndex
(GH 55379)Fixed regression in
DataFrameGroupBy.agg()
andSeriesGroupBy.agg()
where if the optioncompute.use_numba
was set to True, groupby methods not supported by the numba engine would raise aTypeError
(GH 55520)Fixed performance regression with wide DataFrames, typically involving methods where all columns were accessed individually (GH 55256, GH 55245)
Fixed regression in
merge_asof()
raisingTypeError
forby
with datetime and timedelta dtypes (GH 55453)Fixed regression in
read_parquet()
when reading a file with a string column consisting of more than 2 GB of string data and using the"string"
dtype (GH 55606)Fixed regression in
DataFrame.to_sql()
not roundtripping datetime columns correctly for sqlite when usingdetect_types
(GH 55554)Fixed regression in construction of certain DataFrame or Series subclasses (GH 54922)
Bug fixes#
Fixed bug in
DataFrameGroupBy
reductions not preserving object dtype wheninfer_string
is set (GH 55620)Fixed bug in
SeriesGroupBy.value_counts()
returning incorrect dtype for string columns (GH 55627)Fixed bug in
Categorical.equals()
if other has arrow backed string dtype (GH 55364)Fixed bug in
DataFrame.__setitem__()
not inferring string dtype for zero-dimensional array withinfer_string=True
(GH 55366)Fixed bug in
DataFrame.idxmin()
andDataFrame.idxmax()
raising for arrow dtypes (GH 55368)Fixed bug in
DataFrame.interpolate()
raising incorrect error message (GH 55347)Fixed bug in
Index.insert()
raising when insertingNone
intoIndex
withdtype="string[pyarrow_numpy]"
(GH 55365)Fixed bug in
Series.all()
andSeries.any()
not treating missing values correctly fordtype="string[pyarrow_numpy]"
(GH 55367)Fixed bug in
Series.floordiv()
forArrowDtype
(GH 55561)Fixed bug in
Series.mode()
not sorting values for arrow backed string dtype (GH 55621)Fixed bug in
Series.rank()
forstring[pyarrow_numpy]
dtype (GH 55362)Fixed bug in
Series.str.extractall()
forArrowDtype
dtype being converted to object (GH 53846)Fixed bug where PDEP-6 warning about setting an item of an incompatible dtype was being shown when creating a new conditional column (GH 55025)
Silence
Period[B]
warnings introduced by GH 53446 during normal plotting activity (GH 55138)Fixed bug in
Series
constructor not inferring string dtype whenNA
is the first value andinfer_string
is set (:issue:` 55655`)
Other#
Fixed non-working installation of optional dependency group
output_formatting
. Replacing underscore_
with a dash-
fixes broken dependency resolution. A correct way to use now ispip install pandas[output-formatting]
.
Contributors#
A total of 20 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.
Amanda Bizzinotto
Artur Barseghyan +
Hadi Abdi Khojasteh +
Joris Van den Bossche
Luke Manley
Lumberbot (aka Jack)
Marc Garcia
Marco Edward Gorelli
MarcoGorelli
Mateusz Sokół
Matthew Roeschke
Natalia Mokeeva
Pandas Development Team
Patrick Hoefler
Richard Shadrach
Thomas Li
Yao Xiao
dependabot[bot]
rohanjain101 +
torext +