What’s new in 1.3.2 (August 15, 2021)

These are the changes in pandas 1.3.2. See Release notes for a full changelog including other versions of pandas.

Fixed regressions

• Performance regression in DataFrame.isin() and Series.isin() for nullable data types (GH 42714)

• Regression in updating values of Series using boolean index, created by using DataFrame.pop() (GH 42530)

• Regression in DataFrame.from_records() with empty records (GH 42456)

• Fixed regression in DataFrame.shift() where TypeError occurred when shifting DataFrame created by concatenation of slices and fills with values (GH 42719)

• Regression in DataFrame.agg() when the func argument returned lists and axis=1 (GH 42727)

• Regression in DataFrame.drop() does nothing if MultiIndex has duplicates and indexer is a tuple or list of tuples (GH 42771)

• Fixed regression where read_csv() raised a ValueError when parameters names and prefix were both set to None (GH 42387)

• Fixed regression in comparisons between Timestamp object and datetime64 objects outside the implementation bounds for nanosecond datetime64 (GH 42794)

• Fixed regression in Styler.highlight_min() and Styler.highlight_max() where pandas.NA was not successfully ignored (GH 42650)

• Fixed regression in concat() where copy=False was not honored in axis=1 Series concatenation (GH 42501)

• Regression in Series.nlargest() and Series.nsmallest() with nullable integer or float dtype (GH 42816)

• Fixed regression in Series.quantile() with Int64Dtype (GH 42626)

• Fixed regression in Series.groupby() and DataFrame.groupby() where supplying the by argument with a Series named with a tuple would incorrectly raise (GH 42731)

Bug fixes

• Bug in read_excel() modifies the dtypes dictionary when reading a file with duplicate columns (GH 42462)

• 1D slices over extension types turn into N-dimensional slices over ExtensionArrays (GH 42430)

• Fixed bug in Series.rolling() and DataFrame.rolling() not calculating window bounds correctly for the first row when center=True and window is an offset that covers all the rows (GH 42753)

• Styler.hide_columns() now hides the index name header row as well as column headers (GH 42101)

• Styler.set_sticky() has amended CSS to control the column/index names and ensure the correct sticky positions (GH 42537)

• Bug in de-serializing datetime indexes in PYTHONOPTIMIZED mode (GH 42866)

Contributors

For contributors, please see /usr/share/doc/contributors_list.txt or https://github.com/pandas-dev/pandas/graphs/contributors