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Pull requests: pandas-dev/pandas
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BUG: Fixed merge between int64 uint64 and wrote test Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#58332 by YKim0172 was closed May 8, 2024 Loading…
3 tasks done
BUG: Let Concat, Merge/Join, Stack/Unstack, Explode
melt name multiple variable columns for labels from a MultiIndex MultiIndex Reshaping #58088 by rob-sil was merged May 25, 2024 Loading…
4 of 5 tasks
REGR: Performance of DataFrame.stack where columns are not a MultiIndex Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
ENH: Add leftsemi merge Enhancement Reshaping Concat, Merge/Join, Stack/Unstack, Explode Stale
#57979 by phofl was closed Sep 25, 2024 Loading…
5 tasks
REF: Clean up concat statefullness and validation Refactor Internal refactoring of code Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Fix stubname equal suffix in wide to long function Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#57868 by tqa236 was closed May 26, 2025 Loading…
2 of 5 tasks
PERF: Improve merge performance Performance Memory or execution speed performance Reshaping Concat, Merge/Join, Stack/Unstack, Explode Stale
#57559 by phofl was closed Apr 15, 2025 Loading…
5 tasks
Backport PR #57474 on branch 2.2.x (REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs) Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
CoW: Track references in unstack if there is no copy Copy / view semantics Reshaping Concat, Merge/Join, Stack/Unstack, Explode
REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs Bug Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Backport PR #57333 on branch 2.2.x (REGR: merge with 3rd party EA's can sometimes raise ValueError) Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
REGR: merge with 3rd party EA's can sometimes raise ValueError Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Backport PR #57250 on branch 2.2.x (REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False) Docs Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
DEPR: Enforce deprecation of previous implementation of DataFrame.stack Clean Reshaping Concat, Merge/Join, Stack/Unstack, Explode
REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False Docs Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Backport PR #57101 on branch 2.2.x (REGR: Index.join raising TypeError when joining an empty index to a mixed type index) Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Backport PR #57089 on branch 2.2.x (BUG: wide_to_long with string columns) Reshaping Concat, Merge/Join, Stack/Unstack, Explode Strings String extension data type and string data
REGR: Index.join raising TypeError when joining an empty index to a mixed type index Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Backport PR #57018 on branch 2.2.x (REGR: merge_ordered with fill_method="ffill" and how="left") Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
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