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BUG: Take method of NumpyExtensionArray now returns another extension array with the correct dtype.

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

Bug

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

Status: Open (in progress).

pandas-dev/pandasnumber 62502

#62502 In pandas-dev/pandas;

· aijams opened on Sep 29, 2025

BUG: Arithmetic operation on ExtensionArray

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

Status: Draft (not ready).

pandas-dev/pandasnumber 62471

#62471 In pandas-dev/pandas;

· praateekmahajan opened on Sep 26, 2025

BUG: factorize does not preserve extension dtypes

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

Bug

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

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

Status: Open.

#62337 In pandas-dev/pandas;

· batterseapower opened on Sep 14, 2025

BUG: .describe() doesn't work for EAs

Bug

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

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

Status: Open.

#61707 In pandas-dev/pandas;

· andrewgsavage opened on Jun 25, 2025

BUG: assert_frame_equal(check_dtype=False) fails when comparing two DFs containing pd.NA that only differ in dtype (object vs Int32)

Bug

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

good first issue

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

Status: Open.

#61473 In pandas-dev/pandas;

· michiel-de-muynck opened on May 21, 2025

BUG: Some <code>ExtensionArray</code>s can return 0-d Elements

Bug

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

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

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

Status: Open.

#61433 In pandas-dev/pandas;

· ilan-gold opened on May 12, 2025

BUG: Creation of UInt64 column with <code>18446744073709551615</code> throws RuntimeWarning

Bug

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

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

Status: Open.

#60050 In pandas-dev/pandas;

· Tishj opened on Oct 15, 2024

BUG:to_numpy() returns numpy array with Object dtype, for multiple columns with the same dtype ("Float64" or "float64[pyarrow]").

Bug

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

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.

#60038 In pandas-dev/pandas;

· dpmcauliffe opened on Oct 14, 2024

BUG: skipna=True operations don't skip NaN in FloatingArrays

Bug

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

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

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

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

Status: Open.

#59965 In pandas-dev/pandas;

· carlocastoldi opened on Oct 4, 2024

API: pd.StringDtype.value_counts should return pd.Int64Dtype

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

API Design

Arrowpyarrow functionalitypyarrow functionality

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

Status: Open.

#59346 In pandas-dev/pandas;

· WillAyd opened on Jul 29, 2024

BUG: Behaviour of sum/mean on sparse boolean arrays changed between 1.5.3 and pandas 2.2

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

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

SparseSparse Data TypeSparse Data Type

Status: Open.

#58015 In pandas-dev/pandas;

· CompRhys opened on Mar 26, 2024

ENH: Make ExtensionArray a Protocol

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

Enhancement

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

Status: Open.

#57633 In pandas-dev/pandas;

· WillAyd opened on Feb 26, 2024