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BUG: Series.argsort() incorrect handling of NaNs

AlgosNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diffNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff

Bug

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

Status: Closed (completed).

#12694 In pandas-dev/pandas;

· by seth-p was closed on Jun 26, 2024

groupby boxplot doesn't work if multiple by's are used

Bug

Groupby

MultiIndex

Visualizationplottingplotting

Status: Closed (completed).

#14701 In pandas-dev/pandas;

· by languitar was closed on Mar 31, 2024

API: Default to stdlib timezone objects instead of pytz

API Design

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#34916 In pandas-dev/pandas;

· by jbrockmendel was closed on Aug 12, 2024

BUG: <code>len(df.groupby(..., dropna=False))</code> raises ValueError: Categorical categories cannot be null

Bug

good first issue

Groupby

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

Status: Closed (completed).

#35202 In pandas-dev/pandas;

· by ssche was closed on Feb 28, 2025

read_json reads large integers as strings incorrectly if dtype not explicitly mentioned

Bug

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

Status: Closed (completed).

#20608 In pandas-dev/pandas;

· by Udayraj123 was closed on Sep 24, 2024

Support axis=None in all reductions

Enhancement

Reduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.

Status: Closed (completed).

#21597 In pandas-dev/pandas;

· by TomAugspurger was closed on May 25, 2023

ENH: Allow different <code>dtype</code> in <code>pandas.Series.str.get_dummies</code>

Enhancement

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Closed (completed).

#47872 In pandas-dev/pandas;

· by JeffersonQin was closed on Sep 9, 2024

BUG: Hexbin plots does not display x label and xtick labels in pandas 1.3.3

Bug

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

Visualizationplottingplotting

Status: Closed (completed).

#44050 In pandas-dev/pandas;

· by stelios-c was closed on Nov 12, 2024

REF: Series.argsort should dispatch to EA.argsort

ExtensionArrayExtending pandas with custom dtypes or arrays.Extending pandas with custom dtypes or arrays.

RefactorInternal refactoring of codeInternal refactoring of code

Status: Closed (completed).

#43840 In pandas-dev/pandas;

· by jbrockmendel was closed on Jun 26, 2024

BUG: series.astype(str) vs Index.astype(str) inconsistency

Astype

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Closed (completed).

#45326 In pandas-dev/pandas;

· by jbrockmendel was closed on Feb 15, 2023

WEB: Better management of releases in the pandas home page

good first issue

Webpandas websitepandas website

Status: Closed (completed).

#50885 In pandas-dev/pandas;

· by datapythonista was closed on Dec 13, 2023

BUG: pandas 1.5.2 segfault with pypy 3.9-7.3.11

Bug

PyPy

SegfaultNon-Recoverable ErrorNon-Recoverable Error

Status: Closed (completed).

#50817 In pandas-dev/pandas;

· by nicolaerosia was closed on Nov 10, 2023

BUG: <code>Series.isnull()</code> and <code>DataFrame.isnull()</code> do not respect <code>use_inf_as_na</code> option

Bug

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team member

Status: Closed (completed).

#50495 In pandas-dev/pandas;

· by jborman-exos was closed on Feb 14, 2024

CI: pyarrow 11 broke ci

Arrowpyarrow functionalitypyarrow functionality

CIContinuous IntegrationContinuous Integration

Status: Closed (completed).

#51146 In pandas-dev/pandas;

· by phofl was closed on Feb 10, 2023

REF: Proposal: change <code>DataFrame.to_excel</code> to output unformatted excel file

IO Excelread_excel, to_excelread_excel, to_excel

RefactorInternal refactoring of codeInternal refactoring of code

Status: Closed (completed).

#54154 In pandas-dev/pandas;

· by attack68 was closed on Feb 15, 2024

DOC: Adding new columns in a DataFrame of Nullable type might be better explained

Docs

good first issue

NA - MaskedArraysRelated to pd.NA and nullable extension arraysRelated to pd.NA and nullable extension arrays

Status: Closed (completed).

#49201 In pandas-dev/pandas;

· by killerrex was closed on Jun 6, 2024

ENH: Expose <code>to_pandas_kwargs</code> in <code>read_parquet</code> for pyarrow engine

Arrowpyarrow functionalitypyarrow functionality

Enhancement

good first issue

IO Parquetparquet, featherparquet, feather

Status: Closed (completed).

#49236 In pandas-dev/pandas;

· by TomAugspurger was closed on Nov 21, 2024

<code>pyarrow</code> uses <code>is_sparse()</code>, which is deprecated in development code, causing warnings on I/O routines with pandas

Arrowpyarrow functionalitypyarrow functionality

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Needs DiscussionRequires discussion from core team before further actionRequires discussion from core team before further action

Status: Closed (completed).

#52899 In pandas-dev/pandas;

· by Dr-Irv was closed on Dec 28, 2023

ENH: Allow dictionaries to be passed to pandas.Series.str.replace

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

API Design

Enhancement

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

Status: Closed (completed).

#51748 In pandas-dev/pandas;

· by lukefeilberg was closed on Feb 12, 2024

DEPR: make_block

Blocker for rcBlocking issue or pull request for release candidateBlocking issue or pull request for release candidate

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#56815 In pandas-dev/pandas;

· by mroeschke was closed on Jun 4, 2024

BUG: assert_index_equal defaults to check_exact_index=False on integers

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Bug

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

Status: Closed (completed).

#57386 In pandas-dev/pandas;

· by rhshadrach was closed on Apr 24, 2024

DOC: CoW User Guide - Previous behavior is current

Copy / view semantics

Docs

Status: Closed (completed).

#57290 In pandas-dev/pandas;

· by VladimirFokow was closed on Mar 16, 2024

BUG: to_latex() does not escape index name

Bug

IO LaTeXto_latexto_latex

Stylerconditional formatting using DataFrame.styleconditional formatting using DataFrame.style

Status: Closed (completed).

#57362 In pandas-dev/pandas;

· by bileamScheuvens was closed on Apr 28, 2025

BUG: validate_docstring uses main python executable instead of sys.executable

Bug

CIContinuous IntegrationContinuous Integration

Status: Closed (completed).

#57219 In pandas-dev/pandas;

· by jrmylow was closed on Feb 3, 2024

DEPR: groupby.corrwith

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Groupby

Needs DiscussionRequires discussion from core team before further actionRequires discussion from core team before further action

Reduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.

Status: Closed (completed).

#57158 In pandas-dev/pandas;

· by rhshadrach was closed on Jun 3, 2024