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1,818 Open 10,211 Closed
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Issues list

BUG: DataFrame.explode doesn't explode when using pyarrow large list type Bug Needs Triage Issue that has not been reviewed by a pandas team member
#61091 opened Mar 9, 2025 by MarcoGorelli
3 tasks done
BUG: Collision between equivalent frequencies 'QS-FEB' and 'QS-NOV' Bug Datetime Datetime data dtype
#61086 opened Mar 8, 2025 by rwijtvliet
2 of 3 tasks
2
BUG: pd.api.types.infer_dtype on scalar input Bug Docs
#61081 opened Mar 7, 2025 by gnotisauton
3 tasks done
@gm-oo9
8
BUG: str.fullmatch behavior is not the same for object dtype and string[pyarrow] dtype Arrow pyarrow functionality Bug Strings String extension data type and string data
#61072 opened Mar 7, 2025 by ptth222
3 tasks done
BUG: Sorting fails in specific cases with pandas==2.1.1 Bug Needs Info Clarification about behavior needed to assess issue Sorting e.g. sort_index, sort_values
#61068 opened Mar 6, 2025 by nancy-pm
2 of 3 tasks
3
BUG: ValueError: ndarray is not C-contiguous for cummax on nullable dtypes Bug Groupby NA - MaskedArrays Related to pd.NA and nullable extension arrays Transformations e.g. cumsum, diff, rank
#61031 opened Mar 2, 2025 by MarcoGorelli
3 tasks done
@rhshadrach
3
BUG: Dependency check custom error loses information Bug Error Reporting Incorrect or improved errors from pandas
#61030 opened Mar 2, 2025 by Noratrieb
3 tasks done
1
@chilin0525
9
BUG: setting column with 2D object array raises Bug Indexing Related to indexing on series/frames, not to indexes themselves
#61026 opened Mar 1, 2025 by tonyyuyiding
2 tasks done
1
@tonyyuyiding
8
BUG: df.plot() multi-column subplots & title interaction Bug Visualization plotting
#61019 opened Feb 28, 2025 by eicchen02
3 tasks done
@eicchen02
3
BUG: df.plot() "Subplots" changes behavior of how values are stacked using the "Stacked" property Bug Visualization plotting
#61018 opened Feb 28, 2025 by eicchen02
3 tasks done
@eicchen02
3
BUG: scatter and line matplotlib plots not compatible for sharex=True datetime plots Bug Visualization plotting
#61005 opened Feb 25, 2025 by jonbanks87
3 tasks done
@Nivya-21
3
BUG: iloc with Series as indexer fails for __getitem__ but works with __setitem__ Bug Indexing Related to indexing on series/frames, not to indexes themselves
#60994 opened Feb 23, 2025 by luxedo
3 tasks done
1
@arthurlw
2
BUG: invalid result of reindex on columns after unstack with Period data Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#60980 opened Feb 21, 2025 by a-rvn
3 tasks done
@pedromfdiogo
4
BUG: df.astype converts to datetime64[ns] inconsistently with respect to dayfirst Bug datetime.date stdlib datetime.date support Deprecate Functionality to remove in pandas
#60964 opened Feb 19, 2025 by cgflex
3 tasks done
@Anurag-Varma
10
BUG: datetime64 can't be compared with pyarrow-backed variant Bug Datetime Datetime data dtype Numeric Operations Arithmetic, Comparison, and Logical operations
#60937 opened Feb 15, 2025 by MarcoGorelli
3 tasks done
@AshleySonny
3
BUG: Converting string of type lxml.etree._ElementUnicodeResult to a datetime using pandas.to_datetime results in a TypeError. Bug datetime.date stdlib datetime.date support Needs Discussion Requires discussion from core team before further action
#60933 opened Feb 14, 2025 by bentriom
3 tasks done
2
BUG: Index.drop_duplicates() is inconsistent for unhashable values Bug Error Reporting Incorrect or improved errors from pandas
#60925 opened Feb 13, 2025 by camriddell
2 of 3 tasks
3
BUG: series.reindex(mi) behaves different for series with Index and MultiIndex Bug Index Related to the Index class or subclasses MultiIndex
#60923 opened Feb 13, 2025 by ssche
3 tasks done
6
BUG: ValueError: Length of values (5) does not match length of index (4) when subtracting two series with MultIndex and Index and nan values Bug Indexing Related to indexing on series/frames, not to indexes themselves Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate MultiIndex
#60908 opened Feb 11, 2025 by ssche
3 tasks done
BUG: Memory leak when creating a df inside a loop Bug Closing Candidate May be closeable, needs more eyeballs Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance Windows Windows OS
#60897 opened Feb 9, 2025 by Chuck321123
3 tasks done
17
BUG: Poor GroupBy Performance with ArrowDtype(...) wrapped types Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Needs Discussion Requires discussion from core team before further action
#60861 opened Feb 5, 2025 by kzvezdarov
3 tasks done
13
BUG: Unknown Error - Getting from Databricks SQL Python - From PyArrow module (pyarrow.lib.ArrowException) Arrow pyarrow functionality Bug IO SQL to_sql, read_sql, read_sql_query Needs Info Clarification about behavior needed to assess issue
#60838 opened Feb 3, 2025 by Gobi2511
2 of 3 tasks
4
BUG: .str.contains() regex lookbehind and lookahead fail for data type string[pyarrow] Arrow pyarrow functionality Bug Strings String extension data type and string data
#60833 opened Feb 3, 2025 by noahblakesmith
3 tasks done
2.3
10
BUG: pd.HDFStore(file, mode='a') increases file size unnecessarily when file exists and dataframe contains string-based columns Bug IO HDF5 read_hdf, HDFStore
#60823 opened Feb 1, 2025 by brianjzhang
2 of 3 tasks
@PedroM4rques
2
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
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