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BUG: pd.read_pickle not backwards compatible from v2.1.0 to v1.3.4

Bug

IO Pickleread_pickle, to_pickleread_pickle, to_pickle

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#55137 In pandas-dev/pandas;

· by elerys was closed on Dec 5, 2023

BUG: <code>pd.concat</code> dataframes with different datetime64 types

Bug

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Closed (completed).

#53640 In pandas-dev/pandas;

· by Charlie-XIAO was closed on Oct 30, 2023

BUG: variable datetime dtype since Pandas 2.1.0

Bug

Non-Nanodatetime64/timedelta64 with non-nanosecond resolutiondatetime64/timedelta64 with non-nanosecond resolution

Status: Closed (completed).

#55879 In pandas-dev/pandas;

· by sergiykhan was closed on Dec 7, 2023

RLS: Release 2.1.4

Release

Status: Closed (completed).

#56177 In pandas-dev/pandas;

· by lithomas1 was closed on Dec 8, 2023

CI: is_timedelta64_ns_dtype failing for unitless np.timedelta64 2.1.x

CIContinuous IntegrationContinuous Integration

Unreliable TestUnit tests that occasionally failUnit tests that occasionally fail

Status: Closed (completed).

#56318 In pandas-dev/pandas;

· by lithomas1 was closed on Dec 8, 2023

BUG: No kwargs in <code>df.apply(raw=True)</code>

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#55753 In pandas-dev/pandas;

· by erezinman was closed on Nov 14, 2023

BUG: Get deprecation warning from <code>Series</code> constructor

Bug

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Closed (completed).

#55228 In pandas-dev/pandas;

· by rikardn was closed on Nov 16, 2023

BUG: pd.DataFrame.to_hdf does not support multiindex frames with <code>string[pyarrow_numpy]</code>

Bug

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

Status: Closed (completed).

#55088 In pandas-dev/pandas;

· by nvasilevv was closed on Nov 27, 2023

Add doc notes for deprecations

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 56222

#56222 In pandas-dev/pandas;

· by phofl was closed on Nov 28, 2023

BUG: hdf can't deal with ea dtype columns

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

StringsString extension data type and string dataString extension data type and string data

Status: Merged (completed).

pandas-dev/pandasnumber 56194

#56194 In pandas-dev/pandas;

· by phofl was closed on Nov 27, 2023

Backport PR #56194 on branch 2.1.x (BUG: hdf can't deal with ea dtype columns)

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

StringsString extension data type and string dataString extension data type and string data

Status: Merged (completed).

pandas-dev/pandasnumber 56199

#56199 In pandas-dev/pandas;

· by meeseeksmachine was closed on Nov 27, 2023

Backport PR #56222 on branch 2.1.x (Add doc notes for deprecations)

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 56225

#56225 In pandas-dev/pandas;

· by meeseeksmachine was closed on Nov 28, 2023

CLN: Get rid of PyArray_GetCastFunc

Compatpandas objects compatability with Numpy or Python functionspandas objects compatability with Numpy or Python functions

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 56114

#56114 In pandas-dev/pandas;

· by lithomas1 was closed on Nov 26, 2023

DOC: add whatsnew for 2.1.4

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 55924

#55924 In pandas-dev/pandas;

· by lukemanley was closed on Nov 13, 2023

Backport PR #55924 on branch 2.1.x (DOC: add whatsnew for 2.1.4)

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 55937

#55937 In pandas-dev/pandas;

· by meeseeksmachine was closed on Nov 13, 2023

BUG: avoid DeprecationWarning when the Series has index as list of Series

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Merged (completed).

pandas-dev/pandasnumber 55395

#55395 In pandas-dev/pandas;

· by Charlie-XIAO was closed on Nov 16, 2023

Fix for 55753 BUG: No kwargs in df.apply(raw=True) [ Backport to 2.1.x ]

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Status: Merged (completed).

pandas-dev/pandasnumber 55930

#55930 In pandas-dev/pandas;

· by dannyi96 was closed on Nov 14, 2023

Backport PR #55920 on branch 2.1.x (Fix off-by-one in aggregations)

SegfaultNon-Recoverable ErrorNon-Recoverable Error

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Merged (completed).

pandas-dev/pandasnumber 55942

#55942 In pandas-dev/pandas;

· by meeseeksmachine was closed on Nov 13, 2023

BUG: setitem casting object Index to arrow strings

Arrowpyarrow functionalitypyarrow functionality

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

StringsString extension data type and string dataString extension data type and string data

Status: Merged (completed).

pandas-dev/pandasnumber 55639

#55639 In pandas-dev/pandas;

· by phofl was closed on Nov 21, 2023

Backport PR #56063 on branch 2.1.x (CI: Fix pyarrow nightly ci failure)

Arrowpyarrow functionalitypyarrow functionality

CIContinuous IntegrationContinuous Integration

Status: Merged (completed).

pandas-dev/pandasnumber 56069

#56069 In pandas-dev/pandas;

· by meeseeksmachine was closed on Nov 19, 2023

CI: Fix pyarrow nightly ci failure

Arrowpyarrow functionalitypyarrow functionality

CIContinuous IntegrationContinuous Integration

Status: Merged (completed).

pandas-dev/pandasnumber 56063

#56063 In pandas-dev/pandas;

· by phofl was closed on Nov 19, 2023

CI: Ignore EncodingWarning in assert_produces_warning

CIContinuous IntegrationContinuous Integration

Testingpandas testing functions or related to the test suitepandas testing functions or related to the test suite

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Merged (completed).

pandas-dev/pandasnumber 56109

#56109 In pandas-dev/pandas;

· by mroeschke was closed on Nov 22, 2023

CI: Add 3.12 builds

CIContinuous IntegrationContinuous Integration

Status: Merged (completed).

pandas-dev/pandasnumber 56174

#56174 In pandas-dev/pandas;

· by phofl was closed on Nov 30, 2023

BUG: Index.getitem returning wrong result with negative step for arrow

Arrowpyarrow functionalitypyarrow functionality

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

Status: Merged (completed).

pandas-dev/pandasnumber 55832

#55832 In pandas-dev/pandas;

· by phofl was closed on Nov 22, 2023

Use DeprecationWarning instead of FutureWarning for is_.._dtype deprecations

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Merged (completed).

pandas-dev/pandasnumber 55703

#55703 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Dec 7, 2023