List view

REGR: DataFrame.from_records for subclasses no longer calls subclass constructor

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

SubclassingSubclassing pandas objectsSubclassing pandas objects

Status: Closed (completed).

#57008 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 17, 2025

BUG: Index.get_indexer casts values is given as list

API Design

Arrowpyarrow functionalitypyarrow functionality

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

Status: Closed (completed).

#55834 In pandas-dev/pandas;

· by phofl was closed on Nov 16, 2024

BUG (string): contruction of Series / Index fails from dict keys when "str" dtype is specified explicitly

Bug

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

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

Status: Closed (completed).

#60343 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 26, 2025

API: creating DataFrame with no columns: object vs string dtype columns?

API Design

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

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

Status: Closed (completed).

#60338 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Apr 9, 2025

DEPR: deprecate / warn about raising an error in __array__ when copy=False cannot be honore

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

Status: Closed (completed).

#60340 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 13, 2025

BUG (string dtype): <code>replace()</code> value in string column with non-string should cast to object dtype instead of raising an error

Bug

replacereplace methodreplace method

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

Status: Closed (completed).

#60282 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Nov 12, 2024

BUG/API: sum of a string column with all-NaN or empty

Bug

Groupby

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

Status: Closed (completed).

#60229 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Mar 10, 2025

BUG: Inconsistent dtype with GroupBy for StrDtype and all missing values

Bug

Groupby

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

Status: Closed (completed).

#60810 In pandas-dev/pandas;

· by WillAyd was closed on Apr 19, 2025

BUG: <code>pd.Series.groupby</code> issues <code>FutureWarning</code>

Bug

Groupby

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

Status: Closed (completed).

#60831 In pandas-dev/pandas;

· by TiborVoelcker was closed on Feb 22, 2025

BUG (string dtype): looking up missing value in the Index fails

Bug

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

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

Status: Closed (completed).

#59879 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 2, 2025

BUG: <code>numpy.ma.fix_invalid</code> makes changes in-place in numpy 2.1.0 even with <code>copy=True</code>

Bug

Status: Closed (completed).

#59614 In pandas-dev/pandas;

· by kounelisagis was closed on Nov 16, 2024

BUG: .str.contains <code>na</code> validation

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

Bug

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

Status: Closed (completed).

#59561 In pandas-dev/pandas;

· by jbrockmendel was closed on Aug 31, 2024

API/BUG: obj.str.slice(start:None:-1)

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Closed (completed).

#59710 In pandas-dev/pandas;

· by jbrockmendel was closed on Sep 10, 2024

DOC: Intro to pandas table not readily visible in dark mode

Docs

Status: Closed (completed).

#60024 In pandas-dev/pandas;

· by rhshadrach was closed on Apr 30, 2025

BUG: replace with 3 or more <code>None</code> values fails when copy_on_write is enabled

Bug

Copy / view semantics

replacereplace methodreplace method

Status: Closed (completed).

#59770 In pandas-dev/pandas;

· by timvink was closed on Sep 15, 2024

BUG: np.nan_to_num change pandas DataFrame in place when copy = True

Bug

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

Status: Closed (completed).

#59932 In pandas-dev/pandas;

· by lil-blue-curve was closed on Nov 4, 2024

API: string dtype propagation of NaNs in predicate methods (eg .str.startswith)

API Design

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

Status: Closed (completed).

#54805 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Oct 28, 2024

API (string dtype): comparisons between different string classes

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

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

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

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

Status: Closed (completed).

#60639 In pandas-dev/pandas;

· by rhshadrach was closed on May 19, 2025

BUG: round on object columns no longer raises a TypeError

Bug

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

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

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

Status: Closed (completed).

#61206 In pandas-dev/pandas;

· by MT407 was closed on May 21, 2025

BUG: Spurious <code>FutureWarning</code> when using <code>pd.read_json()</code>

Bug

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

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

Status: Closed (completed).

#59511 In pandas-dev/pandas;

· by krassowski was closed on Jun 2, 2025

BUG: FutureWarning for Boolean sparse dtypes in pd.DataFrame.sparse.from_spmatrix()

Bug

SparseSparse Data TypeSparse Data Type

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

Status: Closed (completed).

#59739 In pandas-dev/pandas;

· by sammlapp was closed on Jun 2, 2025

DOC: Documentation website says version 2.2 is unstable

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

Docs

Status: Closed (completed).

#57593 In pandas-dev/pandas;

· by billtubbs was closed on Jun 2, 2025

BUG: pandas testsuite on 2.2.x with numpy 2 fails on numexpr

Bug

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).

#58548 In pandas-dev/pandas;

· by bnavigator was closed on Jun 2, 2025

CoW warning mode for cases that will change behaviour

Copy / view semantics

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Closed (completed).

#56019 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jun 2, 2025

BUG: Union of two DateTimeIndexes is incorrectly calculated

Bug

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

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).

#60816 In pandas-dev/pandas;

· by filmor was closed on Jun 2, 2025