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Issues list

BUG: round on object columns no longer raises a TypeError Bug Error Reporting Incorrect or improved errors from pandas Numeric Operations Arithmetic, Comparison, and Logical operations Regression Functionality that used to work in a prior pandas version
#61206 opened Mar 31, 2025 by MT407
2 of 3 tasks
2.3
@KevsterAmp
4
BUG: Union of two DateTimeIndexes is incorrectly calculated Bug Needs Discussion Requires discussion from core team before further action Non-Nano datetime64/timedelta64 with non-nanosecond resolution Regression Functionality that used to work in a prior pandas version
#60816 opened Jan 29, 2025 by filmor
2 of 3 tasks
2.3
5
BUG: Segfault on np.maximum(series, ...) Bug Regression Functionality that used to work in a prior pandas version ufuncs __array_ufunc__ and __array_function__
#60611 opened Dec 27, 2024 by ssche
2 of 3 tasks
6
BUG: assignment fails with copy_on_write = True Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
#60309 opened Nov 14, 2024 by kameamea
2 of 3 tasks
2.3
1
@chilin0525 @sooooooing
7
BUG: Index.difference is returning too many values Bug Index Related to the Index class or subclasses Regression Functionality that used to work in a prior pandas version setops union, intersection, difference, symmetric_difference
#58971 opened Jun 10, 2024 by michaelpradel
3 tasks done
2.3
2
@TiffL @chilin0525
8
Potential performance regression with "CLN: enforce deprecation of frequencies deprecated for offsets" Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#58962 opened Jun 8, 2024 by DeaMariaLeon
Potential regression induced by "BUG: Use large_string in string array consistently" Arrow pyarrow functionality Needs Triage Issue that has not been reviewed by a pandas team member Regression Functionality that used to work in a prior pandas version Strings String extension data type and string data
#58651 opened May 9, 2024 by DeaMariaLeon 2.3
1
Potential regression induced by commit 9cd5e55 Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#58287 opened Apr 17, 2024 by rhshadrach
88 tasks
2.3
4
Potential regression induced by commit 924f246 Output-Formatting __repr__ of pandas objects, to_string Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#58285 opened Apr 17, 2024 by rhshadrach
3 tasks
3.0
4
Potential regression induced by "Refactored pandas_timedelta_to_timedeltastruct" Needs Triage Issue that has not been reviewed by a pandas team member Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#57951 opened Mar 21, 2024 by DeaMariaLeon 3.0
6
ENH: No longer always show hour, minute and second components for pd.Interval Bug Output-Formatting __repr__ of pandas objects, to_string Regression Functionality that used to work in a prior pandas version
#57748 opened Mar 6, 2024 by ClaireDons
1 of 3 tasks
2.3
2
BUG: melt no longer supports id_vars and value_vars collapsing levels accross MultiIndex Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#57663 opened Feb 28, 2024 by mark-thm
3 tasks done
2.3
2
BUG: Cannot use numpy FLS as indicies since pandas 2.2.1 Bug Needs Triage Issue that has not been reviewed by a pandas team member Regression Functionality that used to work in a prior pandas version
#57645 opened Feb 27, 2024 by jday1
3 tasks done
2.3
1
@PF2100
7
Potential regression induced by PR #56921 Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version Warnings Warnings that appear or should be added to pandas
#57641 opened Feb 27, 2024 by DeaMariaLeon 3.0
@rhshadrach
2
Potential perf regressions introduced by Copy-on-Write Copy / view semantics Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#57431 opened Feb 15, 2024 by rhshadrach
22 of 50 tasks
9
BUG: Resampling with non nano returns an error Bug Non-Nano datetime64/timedelta64 with non-nanosecond resolution Regression Functionality that used to work in a prior pandas version Resample resample method
#57427 opened Feb 14, 2024 by khider
3 tasks done
2.3
2
BUG: Identity checking NA in map is incorrect Arrow pyarrow functionality NA - MaskedArrays Related to pd.NA and nullable extension arrays Regression Functionality that used to work in a prior pandas version
#57390 opened Feb 13, 2024 by mroeschke
1
@droussea2001
4
Potential regression induced by PR #56037 Non-Nano datetime64/timedelta64 with non-nanosecond resolution Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#57366 opened Feb 11, 2024 by rhshadrach 2.3
4
BUG: FutureWarning when splitting a dataframe using np.split Blocker Blocking issue or pull request for an upcoming release Compat pandas objects compatability with Numpy or Python functions Deprecate Functionality to remove in pandas Regression Functionality that used to work in a prior pandas version
#57351 opened Feb 11, 2024 by amanlai
2 of 3 tasks
3.0
13
BUG: pandas.tseries.offsets.Second() division Bug Frequency DateOffsets Regression Functionality that used to work in a prior pandas version
#57264 opened Feb 5, 2024 by famenzel
2 of 3 tasks
2.3
1
@lithomas1
2
BUG: Error when trying to use pd.date_range Bug datetime.date stdlib datetime.date support Regression Functionality that used to work in a prior pandas version
#57215 opened Feb 2, 2024 by khider
3 tasks done
2.3
8
BUG: pandas 2.2.0 DataFrame.groupby regression when group labels of type pd.Timestamp Bug Index Related to the Index class or subclasses Regression Functionality that used to work in a prior pandas version Timezones Timezone data dtype
#57192 opened Feb 1, 2024 by maread99
2 of 3 tasks
2.3
1
3
BUG: df.stack() returns wrong data when NaT is in index (regression since 2.1.0, ok in <= 2.0.3) Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#57152 opened Jan 30, 2024 by behrenhoff
3 tasks done
2.3
3
BUG: DataFrame.update() raises FutureWarning due to the use of 'where' method Bug Conditionals E.g. where, mask, case_when DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions Regression Functionality that used to work in a prior pandas version
#57124 opened Jan 29, 2024 by Clifford-Yen
3 tasks done
2.3
1
BUG: Pandas 2.2 breaks SQLAlchemy 1.4 compatibility Compat pandas objects compatability with Numpy or Python functions Dependencies Required and optional dependencies IO SQL to_sql, read_sql, read_sql_query Regression Functionality that used to work in a prior pandas version
#57049 opened Jan 24, 2024 by miraculixx
3 tasks done
2.3
1
@snitish
28
ProTip! Updated in the last three days: updated:>2025-05-07.