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Pull requests: pandas-dev/pandas
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REGR: from_records not initializing subclasses properly Regression Functionality that used to work in a prior pandas version Stale
REGR: ensure numpy fixed-size binary/string arrays are converted to object dtype for Index creation Dtype Conversions Unexpected or buggy dtype conversions Index Related to the Index class or subclasses Regression Functionality that used to work in a prior pandas version
Backport PR #57314 on branch 2.2.x (BUG: Fix near-minimum timestamp handling) Regression Functionality that used to work in a prior pandas version Timestamp pd.Timestamp and associated methods
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
REGR: Index.map adding back tz to tz-agnostic result Apply Apply, Aggregate, Transform, Map Index Related to the Index class or subclasses Regression Functionality that used to work in a prior pandas version
Backport PR #57311 on branch 2.2.x (Fixing multi method for to_sql for non-oracle databases) IO SQL to_sql, read_sql, read_sql_query Regression Functionality that used to work in a prior pandas version
Backport PR #57341 on branch 2.2.x (REGR: assert_series_equal defaulting to check_exact=True for Index) Regression Functionality that used to work in a prior pandas version Testing pandas testing functions or related to the test suite
Backport PR #57323 on branch 2.2.x (REGR: Fix regression when grouping over a Series) Copy / view semantics Regression Functionality that used to work in a prior pandas version
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
Backport PR #57329 on branch 2.2.x (REGR: CategoricalIndex.difference with null values) Categorical Categorical Data Type Regression Functionality that used to work in a prior pandas version setops union, intersection, difference, symmetric_difference
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
Backport PR #57232 on branch 2.2.x (REGR: to_json converting nullable ints to floats) IO JSON read_json, to_json, json_normalize Regression Functionality that used to work in a prior pandas version
Backport PR #57169 on branch 2.2.x (REGR: DataFrame.sort_index not producing stable sort) Index Related to the Index class or subclasses Regression Functionality that used to work in a prior pandas version
REGR: Series.astype raising TypeError when converting a pyarrow integer type with nulls to numpy float Arrow pyarrow functionality Dtype Conversions Unexpected or buggy dtype conversions Regression Functionality that used to work in a prior pandas version
Backport PR #57061 on branch 2.2.x (REGR: non-unique, masked dtype index raising IndexError) Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
Backport PR #57102 on branch 2.2.x (ENH: Add skipna to groupby.first and groupby.last) Enhancement Groupby Reduction Operations sum, mean, min, max, etc. Regression Functionality that used to work in a prior pandas version
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 #57046 on branch 2.2.x (REGR: groupby.idxmin/idxmax wrong result on extreme values) Bug Groupby Reduction Operations sum, mean, min, max, etc. Regression Functionality that used to work in a prior pandas version
Backport PR #57034 on branch 2.2.x (REGR: perf regression in Series.combine_first) Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
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
Backport PR #56922 on branch 2.2.x (REGR: DatetimeTZDtype __from_arrow__ interprets UTC values as wall time) Arrow pyarrow functionality Regression Functionality that used to work in a prior pandas version
Backport PR #56849 on branch 2.2.x (REGR: freq "m" (as alias of deprecated "M") raises an error) Frequency DateOffsets Regression Functionality that used to work in a prior pandas version
Backport PR #56761 on branch 2.2.x (BUG: fix subclass metadata preservation in groupby column selection) Bug Groupby Regression Functionality that used to work in a prior pandas version Subclassing Subclassing pandas objects
Backport PR #53641: BUG: datetime64/timedelta64 with non-nanosecond resolution Regression Functionality that used to work in a prior pandas version Reshaping Concat, Merge/Join, Stack/Unstack, Explode
pd.concat dataframes with different dateti… Non-Nano Backport PR #55764 on branch 2.1.x (REGR: fix return class in _constructor_from_mgr for simple subclasses) Regression Functionality that used to work in a prior pandas version Subclassing Subclassing pandas objects
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