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Switch default string storage from python to pyarrow (if installed) also for NA-variant of the StringDtype

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

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

Status: Open (in progress).

pandas-dev/pandasnumber 62118

#62118 In pandas-dev/pandas;

· jorisvandenbossche opened on Aug 15, 2025

· Updated on Aug 15, 2025

· 

3.0

Change default string storage from "python" to "pyarrow" (if installed) for for NA-variant of StringDtype

API Design

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

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

Status: Open.

#60287 In pandas-dev/pandas;

· jorisvandenbossche opened on Nov 12, 2024

· Updated on Aug 15, 2025

· 

3.0

BUG: rank with object dtype and small values

Bug

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

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

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Status: Open.

#62036 In pandas-dev/pandas;

· jbrockmendel opened on Aug 3, 2025

· Updated on Aug 15, 2025

ENH: Shall we let pd.NA * 0 equals to zero?

API Design

Enhancement

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

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

Status: Open.

#47117 In pandas-dev/pandas;

· tushushu opened on May 25, 2022

· Updated on Aug 12, 2025

Should IntegerArray provide data / mask through an API?

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Enhancement

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

Status: Open.

#34873 In pandas-dev/pandas;

· xhochy opened on Jun 19, 2020

· Updated on Aug 5, 2025

Follow-up on basic FloatingArray implementation

Enhancement

Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issues

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

Status: Open.

#38110 In pandas-dev/pandas;

· jorisvandenbossche opened on Nov 27, 2020

· Updated on Aug 5, 2025

BUG: isna() does not catch np.NaN when datatype is Float64

Bug

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

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

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

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

Status: Open.

#60106 In pandas-dev/pandas;

· mortnstak opened on Oct 25, 2024

· Updated on Jul 23, 2025

BUG: AssertionError when multiplying timedelta Series with a pandas nullable dtype Series

Bug

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

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

TimedeltaTimedelta data typeTimedelta data type

Status: Open.

#58054 In pandas-dev/pandas;

· jamesdow21 opened on Mar 28, 2024

· Updated on Jul 15, 2025

Inconsistent behaviour of GroupBy for BooleanArray series

Groupby

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

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

Status: Open.

#58031 In pandas-dev/pandas;

· ziviland opened on Mar 27, 2024

· Updated on Jul 15, 2025

BUG: mix of int and pd.NA defaults to object dtype

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

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Enhancement

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

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

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

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

Status: Open.

#33662 In pandas-dev/pandas;

· eddy-geek opened on Apr 19, 2020

· Updated on Jun 13, 2025

BUG: Series.mask incorrectly replaces positions of pd.NA in the cond argument

Arrowpyarrow functionalitypyarrow functionality

Bug

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

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

Status: Open.

#60729 In pandas-dev/pandas;

· kartoria opened on Jan 18, 2025

· Updated on May 27, 2025

BUG: <code>.map</code> &amp; <code>.apply</code> would convert element type for extension array.

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

Bug

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

Status: Open.

#60766 In pandas-dev/pandas;

· colinfang opened on Jan 22, 2025

· Updated on Apr 23, 2025