What’s new in 1.3.2 (August 15, 2021) — pandas 2.2.3 documentation (original) (raw)

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 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)

A total of 16 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.