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Issues list

BUG: DataFrame.to_markdown exception when a cell has numpy.array type Bug Dependencies Required and optional dependencies IO Data IO issues that don't fit into a more specific label Needs Discussion Requires discussion from core team before further action Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#61337 opened Apr 22, 2025 by omarsaad98
3 tasks done
@sajmaru
6
BUG: pd.to_sql fails with an ARRAY of composites Bug IO SQL to_sql, read_sql, read_sql_query Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54651 opened Aug 20, 2023 by sergiykhan
3 tasks done
BUG (Regression): Using a tuple as first column name in empty dataframe creates a non functional dataframe and memory errors Bug DataFrame DataFrame data structure Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54385 opened Aug 3, 2023 by jenno-verdonck
2 of 3 tasks
4
BUG: list output incorrectly reused when calling DataFrame.apply Apply Apply, Aggregate, Transform, Map Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54250 opened Jul 25, 2023 by pkch
3 tasks done
2
BUG: Bug Indexing Related to indexing on series/frames, not to indexes themselves MultiIndex Needs Discussion Requires discussion from core team before further action Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54013 opened Jul 5, 2023 by mcp292
3 tasks done
1
BUG: Reassigning an index in a Series with a 1 dimensional numpy array of length 1 loses dimension. Regression from v 2.0.0 Bug Indexing Related to indexing on series/frames, not to indexes themselves Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Regression Functionality that used to work in a prior pandas version
#53565 opened Jun 8, 2023 by lendle
2 of 3 tasks
4
BUG: Problem in assigning multiple items to ListType array members Arrow pyarrow functionality Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#53178 opened May 11, 2023 by martinschi
3
ENH: Enable assert_almost_equal to test numpy-like zero-dimensional arrays Enhancement Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Testing pandas testing functions or related to the test suite
#48919 opened Oct 3, 2022 by andrewgsavage
1 of 3 tasks
2
@kvn4
7
BUG: A series/dataframe with np.nan values stored in a tuple does not pickle/unpickle as expected Bug IO Pickle read_pickle, to_pickle Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#45945 opened Feb 11, 2022 by thehomebrewnerd
2 of 3 tasks
BUG: unsuccessful value assignment of data frame with an n*2 list when using pandas loc Bug Indexing Related to indexing on series/frames, not to indexes themselves MultiIndex Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#45769 opened Feb 1, 2022 by jialusui
3 tasks done
1
BUG: _repr_*_ methods should not iterate over Sequence when dtype=object Enhancement Needs Discussion Requires discussion from core team before further action Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Output-Formatting __repr__ of pandas objects, to_string
#44799 opened Dec 7, 2021 by randolf-scholz
2 of 3 tasks
6
BUG: .fillna({}) doesn't work Bug Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#44030 opened Oct 14, 2021 by q121212
3 tasks done
2
BUG: Inconsistency between behavior of cumsum when applied directly, and when applied within groupby. API - Consistency Internal Consistency of API/Behavior Bug Groupby Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#44009 opened Oct 13, 2021 by floccinauc
3 tasks done
1
BUG: DataFrame.drop() fails when columns= is given as tuple Bug Needs Discussion Requires discussion from core team before further action Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#43978 opened Oct 11, 2021 by JBGreisman
2 of 3 tasks
1
@erfannariman
6
BUG: DataFrame.equals returns True when compared elements differ in being np.arrays Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#43867 opened Oct 3, 2021 by MaxGhenis
2 of 3 tasks
1
BUG: Selecting multiple columns from data frames with MultiIndex columns raises "ValueError" when each level of index is tuple Bug Indexing Related to indexing on series/frames, not to indexes themselves MultiIndex Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#43780 opened Sep 28, 2021 by tiezhishizi
3 tasks done
1
2
BUG: pd.testing.assert_frame_equal fails if nested DataFrame contains np.nan Bug DataFrame DataFrame data structure Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Testing pandas testing functions or related to the test suite
#43022 opened Aug 13, 2021 by ChiQiao
2 of 3 tasks
@pratyushsharan
6
BUG: equals method failed for nested Series/DataFrame Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#43008 opened Aug 13, 2021 by ChiQiao
2 of 3 tasks
3
BUG: list-like objects are broadcast to each row (1.3 regression) Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#42549 opened Jul 15, 2021 by erik-hasse
3 tasks done
20
ENH: json_normalize flatten lists as well Enhancement IO JSON read_json, to_json, json_normalize Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#42311 opened Jun 29, 2021 by cosama
1
BUG: Addition operation between NaN and list returns NaN Deprecate Functionality to remove in pandas Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Needs Discussion Requires discussion from core team before further action Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Numeric Operations Arithmetic, Comparison, and Logical operations
#41764 opened Jun 1, 2021 by aj125
2 of 3 tasks
1
BUG: The DataFrame object's element bool check can NOT work with empty list Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Numeric Operations Arithmetic, Comparison, and Logical operations
#41582 opened May 20, 2021 by TigerZhao007
2 of 3 tasks
2
BUG: Infinite recursion when creating Series with arrow-backed extension dtype and no data Bug Constructors Series/DataFrame/Index/pd.array Constructors ExtensionArray Extending pandas with custom dtypes or arrays. Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#41377 opened May 8, 2021 by mosalx
2 of 3 tasks
BUG: Frozensets are not supported as indices. Bug Indexing Related to indexing on series/frames, not to indexes themselves Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#41238 opened Apr 30, 2021 by pezize
2 of 3 tasks
BUG: map nested dict on categorical Series prints a TypeError and ignores it Bug Categorical Categorical Data Type hashing hash_pandas_object Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#40892 opened Apr 12, 2021 by adrien-berchet
2 of 3 tasks
3
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