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BUG: Inconsistent resolution from constructing with and assigning datetime values

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

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

Status: Closed (completed).

#57080 In pandas-dev/pandas;

· by zhu0210 was closed on May 31, 2024

PERF: Slow Series.plot() for DatetimeIndex for pandas 2.2.0 compared to 2.1.4

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Visualizationplottingplotting

Status: Closed (completed).

#57035 In pandas-dev/pandas;

· by rhkarls was closed on Jun 13, 2024

BUG: regression, is_unique is incorrect since pandas 2.1.0

Bug

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

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

Status: Closed (completed).

#57911 In pandas-dev/pandas;

· by morotti was closed on Aug 6, 2024

RLS: 2.2.3

Release

Status: Closed (completed).

#58354 In pandas-dev/pandas;

· by lithomas1 was closed on Sep 21, 2024

BUILD: 3rd party licenses are missing from pandas binary wheels distributed on pypi

BlockerBlocking issue or pull request for an upcoming releaseBlocking issue or pull request for an upcoming release

BuildLibrary building on various platformsLibrary building on various platforms

Status: Closed (completed).

#58632 In pandas-dev/pandas;

· by markdryan was closed on Sep 19, 2024

BUG: Inconsistent datetime conversion behavior when constructing a DataFrame with Python datetimes.

Bug

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

Status: Closed (completed).

#55014 In pandas-dev/pandas;

· by raeganbarker was closed on May 31, 2024

BUG: When upsampling an empty dataframe, the index type changes from DatetimeIndex to MultiIndex

Bug

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

Resampleresample methodresample method

Status: Closed (completed).

#55572 In pandas-dev/pandas;

· by creid-hartree was closed on Mar 24, 2025

REGR: Index.map adding back tz to tz-agnostic result

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

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

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

Status: Closed (abandoned).

pandas-dev/pandasnumber 57475

#57475 In pandas-dev/pandas;

· by rhshadrach was closed on Jul 4, 2024

REGR: Behavior differs when adding Series to frame between matching and non matching index

Numeric OperationsArithmetic, Comparison, and Logical operationsArithmetic, Comparison, and Logical operations

Stale

Status: Closed (abandoned).

pandas-dev/pandasnumber 57462

#57462 In pandas-dev/pandas;

· by phofl was closed on Apr 23, 2024

REGR: ensure numpy fixed-size binary/string arrays are converted to object dtype for Index creation

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

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

Status: Closed (abandoned).

pandas-dev/pandasnumber 57995

#57995 In pandas-dev/pandas;

· by PF2100 was closed on Sep 25, 2024

CI: Pin docutils to < 0.21

CIContinuous IntegrationContinuous Integration

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 58293

#58293 In pandas-dev/pandas;

· by mroeschke was closed on Apr 17, 2024

Backport PR #58293 on branch 2.2.x (CI: Pin docutils to < 0.21)

CIContinuous IntegrationContinuous Integration

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 58295

#58295 In pandas-dev/pandas;

· by meeseeksmachine was closed on Apr 17, 2024

Revert "CI: Pin blosc to fix pytables"

CIContinuous IntegrationContinuous Integration

Status: Merged (completed).

pandas-dev/pandasnumber 58218

#58218 In pandas-dev/pandas;

· by lithomas1 was closed on Apr 11, 2024

Backport PR #58268 on branch 2.2.x (CI/TST: Unxfail test_slice_locs_negative_step Pyarrow test)

Arrowpyarrow functionalitypyarrow functionality

CIContinuous IntegrationContinuous Integration

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

Status: Merged (completed).

pandas-dev/pandasnumber 58269

#58269 In pandas-dev/pandas;

· by meeseeksmachine was closed on Apr 15, 2024

REGR: from_records not initializing subclasses properly

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

Stale

Status: Closed (abandoned).

pandas-dev/pandasnumber 58145

#58145 In pandas-dev/pandas;

· by phofl was closed on Sep 25, 2024

CI: Fix npdev failures

CIContinuous IntegrationContinuous Integration

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

Status: Merged (completed).

pandas-dev/pandasnumber 58389

#58389 In pandas-dev/pandas;

· by mroeschke was closed on Apr 24, 2024

Backport PR #58389 on branch 2.2.x (CI: Fix npdev failures)

CIContinuous IntegrationContinuous Integration

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

Status: Merged (completed).

pandas-dev/pandasnumber 58408

#58408 In pandas-dev/pandas;

· by meeseeksmachine was closed on Apr 24, 2024

CI: remove xfail in test_to_xarray_index_types

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

Status: Merged (completed).

pandas-dev/pandasnumber 59013

#59013 In pandas-dev/pandas;

· by Aloqeely was closed on Jun 14, 2024

Backport PR #59013 on branch 2.2.x (CI: remove xfail in test_to_xarray_index_types )

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

Status: Merged (completed).

pandas-dev/pandasnumber 59015

#59015 In pandas-dev/pandas;

· by meeseeksmachine was closed on Jun 14, 2024

PERF: cache plotting date locators for DatetimeIndex plotting

PerformanceMemory or execution speed performanceMemory or execution speed performance

Visualizationplottingplotting

Status: Merged (completed).

pandas-dev/pandasnumber 58992

#58992 In pandas-dev/pandas;

· by mroeschke was closed on Jun 13, 2024

BUG: Use large_string in string array consistently

Arrowpyarrow functionalitypyarrow functionality

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

Status: Merged (completed).

pandas-dev/pandasnumber 58590

#58590 In pandas-dev/pandas;

· by phofl was closed on May 6, 2024

CI/TST: Unxfail test_slice_locs_negative_step Pyarrow test

Arrowpyarrow functionalitypyarrow functionality

CIContinuous IntegrationContinuous Integration

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

Status: Merged (completed).

pandas-dev/pandasnumber 58268

#58268 In pandas-dev/pandas;

· by mroeschke was closed on Apr 15, 2024

Backport PR #59818 on branch 2.2.x (BUG: Remove np._get_promotion_state usage)

Status: Merged (completed).

pandas-dev/pandasnumber 59821

#59821 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Sep 16, 2024

BUG: Remove np._get_promotion_state usage

CIContinuous IntegrationContinuous Integration

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

Status: Merged (completed).

pandas-dev/pandasnumber 59818

#59818 In pandas-dev/pandas;

· by lysnikolaou was closed on Sep 16, 2024

Backport PR #59836 on branch 2.2.x (BLD: Fix bad Cython annotation)

BuildLibrary building on various platformsLibrary building on various platforms

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

Python 3.13

Status: Merged (completed).

pandas-dev/pandasnumber 59837

#59837 In pandas-dev/pandas;

· by meeseeksmachine was closed on Sep 18, 2024