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What's new in 1.5.3 (December ??, 2022)

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

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Fixed regressions

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

Bug fixes

  • Bug in .Styler.to_excel leading to error when unrecognized border-style (e.g. "hair") provided to Excel writers (48649)
  • Bug when chaining several .Styler.concat calls, only the last styler was concatenated (49207)
  • Fixed bug when instantiating a DataFrame subclass inheriting from typing.Generic that triggered a UserWarning on python 3.11 (49649)
  • Bug in pandas.testing.assert_series_equal (and equivalent assert_ functions) when having nested data and using numpy >= 1.25 (50360)

Other

  • Reverted deprecation (45324) of behavior of Series.__getitem__ and Series.__setitem__ slicing with an integer Index; this will remain positional (49612)

Contributors

v1.5.2..v1.5.3|HEAD