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Backport PR #44828 on branch 1.3.x (REGR: resampling DataFrame with DateTimeIndex with empty groups and uint8, uint16 or uint32 columns incorrectly raising RuntimeError) Datetime Datetime data dtype Regression Functionality that used to work in a prior pandas version Resample resample method
Backport PR #41789 on branch 1.2.x (Bug in xs raising KeyError for MultiIndex columns with droplevel False and list indexe) Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
REGR: loc.setitem losing index name when df was empty before Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
BUG: Preserve sparse dtype when reindexing Regression Functionality that used to work in a prior pandas version Sparse Sparse Data Type
#26183 by alex-hutton was closed Jun 8, 2019 Loading…
1 of 4 tasks
REGR: missing vals not replaceable in categorical Categorical Categorical Data Type Regression Functionality that used to work in a prior pandas version replace replace method
#40657 by mzeitlin11 was closed Mar 31, 2021 Loading…
4 tasks done
Fix issue #31708 Series.astype(str, skipna=True) vanished in the 1.0 release Bug Regression Functionality that used to work in a prior pandas version
#35060 by t0ma-sz was closed Jul 17, 2020 Loading…
5 tasks
BUG: boolean masking with Index objects Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
#17219 by naor2013 was closed Oct 2, 2017 Loading…
Change check_freq default to False Regression Functionality that used to work in a prior pandas version Testing pandas testing functions or related to the test suite
#35571 by MaxWinterstein was closed Aug 14, 2020 Loading…
4 of 5 tasks
Bug in melt raising Error with dup columns as value vars Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
REGR: Series.str.encode("base64") Regression Functionality that used to work in a prior pandas version Strings String extension data type and string data
BUG: Too aggressive typing in NDFrame.align Regression Functionality that used to work in a prior pandas version Typing type annotations, mypy/pyright type checking
BUG: Fix RangeIndex.get_indexer for decreasing RangeIndex Bug Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
BUG: replace with value also being replaced Bug Regression Functionality that used to work in a prior pandas version replace replace method
BUG: Fix astype from float32 to string Bug Output-Formatting __repr__ of pandas objects, to_string Regression Functionality that used to work in a prior pandas version Strings String extension data type and string data
REG: DataFrame.shift with axis=1 and CategoricalIndex columns Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Bug Categorical Categorical Data Type Regression Functionality that used to work in a prior pandas version
BUG: fix reindexing MultiIndex with categorical datetime-like level Categorical Categorical Data Type MultiIndex Regression Functionality that used to work in a prior pandas version
BUG: Fix unwanted type casting while replacing values in a DataFrame Dtype Conversions Unexpected or buggy dtype conversions Regression Functionality that used to work in a prior pandas version
#33067 by phofl was closed May 11, 2020 Loading…
4 of 5 tasks
BUG: GH14323 Union of differences from DatetimeIndex incorrect Bug Datetime Datetime data dtype Regression Functionality that used to work in a prior pandas version
tocsv_interval _categories Bug Categorical Categorical Data Type IO CSV read_csv, to_csv Regression Functionality that used to work in a prior pandas version
REGR: fix regression in groupby aggregation with out-of-bounds datetimes Groupby Regression Functionality that used to work in a prior pandas version
BUG: DataFrame.explode is failing on scalar int value. Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
BUG: do not crash on a callable grouper returning tuples Groupby MultiIndex Regression Functionality that used to work in a prior pandas version
#22279 by toobaz was closed Dec 14, 2018 Loading…
4 tasks done
REGR: setting column with setitem should not modify existing array inplace Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
BUG: Fixed NDFrame.transform('abs') Apply Apply, Aggregate, Transform, Map Regression Functionality that used to work in a prior pandas version
REGR: Fix TypeError in groupby min / max of period column Groupby Regression Functionality that used to work in a prior pandas version
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