What’s new in 1.5.3 (January 18, 2023) — pandas 2.2.3 documentation (original) (raw)

These are the changes in pandas 1.5.3. See Release notes for a full changelog including other versions of pandas.

Fixed regressions#

• Fixed performance regression in Series.isin() when values is empty (GH 49839)
• Fixed regression in DataFrame.memory_usage() showing unnecessary FutureWarning when DataFrame is empty (GH 50066)
• Fixed regression in DataFrameGroupBy.transform() when used with as_index=False (GH 49834)
• Enforced reversion of color as an alias for c and size as an alias for s in function DataFrame.plot.scatter() (GH 49732)
• Fixed regression in SeriesGroupBy.apply() setting a name attribute on the result if the result was a DataFrame (GH 49907)
• Fixed performance regression in setting with the at() indexer (GH 49771)
• Fixed regression in to_datetime() raising ValueError when parsing array of float containing np.nan (GH 50237)

Bug fixes#

• Bug in the Copy-on-Write implementation losing track of views when indexing a DataFrame with another DataFrame (GH 50630)
• Bug in Styler.to_excel() leading to error when unrecognized border-style (e.g. "hair") provided to Excel writers (GH 48649)
• Bug in Series.quantile() emitting warning from NumPy when Series has only NA values (GH 50681)
• Bug when chaining several Styler.concat() calls, only the last styler was concatenated (GH 49207)
• Fixed bug when instantiating a DataFrame subclass inheriting from typing.Generic that triggered a UserWarning on python 3.11 (GH 49649)
• Bug in pivot_table() with NumPy 1.24 or greater when the DataFrame columns has nested elements (GH 50342)
• Bug in pandas.testing.assert_series_equal() (and equivalent assert_ functions) when having nested data and using numpy >= 1.25 (GH 50360)

Other#

Note

If you are using DataFrame.to_sql(), read_sql(), read_sql_table(), or read_sql_query() with SQLAlchemy 1.4.46 or greater, you may see a sqlalchemy.exc.RemovedIn20Warning. These warnings can be safely ignored for the SQLAlchemy 1.4.x releases as pandas works toward compatibility with SQLAlchemy 2.0.

• Reverted deprecation (GH 45324) of behavior of Series.__getitem__() and Series.__setitem__() slicing with an integer Index; this will remain positional (GH 49612)
• A FutureWarning raised when attempting to set values inplace with DataFrame.loc() or DataFrame.iloc() has been changed to a DeprecationWarning (GH 48673)

Contributors#

A total of 19 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.

• Emma Carballal Haire +
• Irv Lustig
• JHM Darbyshire
• Joris Van den Bossche
• Marc Garcia
• Marco Edward Gorelli
• MarcoGorelli
• Matthew Roeschke
• MeeseeksMachine
• Natalia Mokeeva
• Pandas Development Team
• Patrick Hoefler
• Richard Shadrach
• Tsvika Shapira +
• William Ayd
• aneesh98
• jakirkham +
• jbrockmendel
• silviaovo +