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197 Open 1,158 Closed
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Issues list

ENH: df.join should not convert int32 to float but instead pd.Int32Dtype when introducing NaN Dtype Conversions Unexpected or buggy dtype conversions Enhancement NA - MaskedArrays Related to pd.NA and nullable extension arrays Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#48421 opened Sep 6, 2022 by septatrix
1 of 3 tasks
BUG: Crosstab inconsistent with using aggfunc=sum when MultiIndex has category Bug Categorical Categorical Data Type Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#47147 opened May 27, 2022 by BraisLP
7
ENH: Add lsuffix=/rsuffix= kwargs to pd.merge() and df.merge() API - Consistency Internal Consistency of API/Behavior Deprecate Functionality to remove in pandas Enhancement Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#46046 opened Feb 18, 2022 by wany-oh
3
BUG: Pivot table on empty frame generates MultiIndex (regression) Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#46475 opened Mar 22, 2022 by rxxg
3 tasks done
@zhenqin77
5
BUG: pd.concat on DF with time series containing daylight/non-daylight savings times changes some time index values and sets data values to NaN Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode Timezones Timezone data dtype
#46539 opened Mar 28, 2022 by davehemming
3 tasks done
2
ENH: allow preserving one of the indexes when merging two DataFrames Enhancement Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#46882 opened Apr 27, 2022 by multimeric
1
@Mehgarg
4
ENH: Add pd.Series.stack() -> pd.MultiIndex Enhancement Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#49749 opened Nov 17, 2022 by erezinman
1 of 3 tasks
2
API/BUG: pd.concat doesn't copy indexes if with axis=1 and copy=True when they are the same Bug Copy / view semantics Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#50673 opened Jan 11, 2023 by lithomas1
3
BUG: column labels converted to string in merge Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#46885 opened Apr 27, 2022 by ericman93
3 tasks done
6
BUG: pd.wide_to_long can't handle stubname equal to suffix Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#46939 opened May 4, 2022 by YMRTN
2 of 3 tasks
1
@tqa236
3
API: ExtensionArray._concat_same_type doesn't define axis API Design ExtensionArray Extending pandas with custom dtypes or arrays. PDEP missing values Issues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#47514 opened Jun 26, 2022 by mroeschke
5
PERF: Memory leak when returning subset of DataFrame and deleting the rest Indexing Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#49582 opened Nov 8, 2022 by mar-ses
3 tasks done
8
BUG: Full outer of single index dataframe on multi-index dataframe behavior not as expected Bug MultiIndex Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#49516 opened Nov 4, 2022 by david6l34
2 of 3 tasks
ENH: "one-to-one" validation in left join should ignore right side non unique that are not in left Enhancement Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#50492 opened Dec 29, 2022 by alonme
1 of 3 tasks
1
ENH: allow EAs to override MergeOperation._get_join_indexers API Design ExtensionArray Extending pandas with custom dtypes or arrays. Performance Memory or execution speed performance Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#53696 opened Jun 15, 2023 by jbrockmendel
3
DEPR: left_index, right_index in pd.merge Deprecate Functionality to remove in pandas Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#53783 opened Jun 22, 2023 by jbrockmendel
3 tasks done
2
DEPR: Some dropna behaviors in DataFrame.pivot_table 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 Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#53521 opened Jun 4, 2023 by rhshadrach
1
DEPR: pd.merge vs DataFrame.merge Deprecate Functionality to remove in pandas Needs Discussion Requires discussion from core team before further action Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#53708 opened Jun 17, 2023 by jbrockmendel
3 tasks done
3
BUG: DataFrame.pivot fails with pyarrow backend if variable is already encoded as dictionary Arrow pyarrow functionality Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#53051 opened May 3, 2023 by randolf-scholz
3 tasks done
1
@aswinj18
6
BUG: df1.merge(df2, on='ds', how='outer') not convert column ds to the highest resolution datetime type of the two dfs Bug Non-Nano datetime64/timedelta64 with non-nanosecond resolution Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#55212 opened Sep 20, 2023 by seanslma
2 of 3 tasks
2.2.3
1
4
BUG/TST: can_use_libjoin cases with mixed-freq Periods Bug Period Period data type Reshaping Concat, Merge/Join, Stack/Unstack, Explode Testing pandas testing functions or related to the test suite
#55333 opened Sep 30, 2023 by jbrockmendel
2
BUG/TST: can_use_libjoin exclude CategoricalDtype? Bug Categorical Categorical Data Type Index Related to the Index class or subclasses Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#55335 opened Sep 30, 2023 by jbrockmendel
1
BUG: Index.join different sorting behavior in libjoin faspath Bug Index Related to the Index class or subclasses Internals Related to non-user accessible pandas implementation Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#54646 opened Aug 20, 2023 by jbrockmendel
6
ENH: dataframe.explode() function variant Enhancement Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#55063 opened Sep 8, 2023 by jablka
2 of 3 tasks
@rmhowe425
3
BUG: DataFrame.explode() does not gracefully handle tuple arguments Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#55142 opened Sep 15, 2023 by BenjaminHelyer
3 tasks done
2
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