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BUG: Exception with <code>unstack(sort=False)</code> and NA in index

Bug

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

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61221 In pandas-dev/pandas;

· jlumpe opened on Apr 3, 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

REF: make _cast_pointwise_result an EA method

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

RefactorInternal refactoring of codeInternal refactoring of code

Status: Open.

#59895 In pandas-dev/pandas;

· jbrockmendel opened on Sep 25, 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

ENH: Pandas Tensor Data Type

Enhancement

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.

#59006 In pandas-dev/pandas;

· bionicles opened on Jun 13, 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.

Status: Open.

#58015 In pandas-dev/pandas;

· CompRhys opened on Mar 26, 2024

BUG: pd.read_csv error when parse_dates used on index_col for dtype_backend="pyarrow"

Arrowpyarrow functionalitypyarrow functionality

Bug

DatetimeDatetime data dtypeDatetime data dtype

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

IO CSVread_csv, to_csvread_csv, to_csv

Status: Open.

#57930 In pandas-dev/pandas;

· MCRE-BE opened on Mar 20, 2024

ENH: Make ExtensionArray a Protocol

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

PERF: groupby.first and groupby.last fallback to apply for EAs

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

Groupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Open.

#57591 In pandas-dev/pandas;

· rhshadrach opened on Feb 23, 2024

BUG: Subtraction fails with matching index of different name and type

Bug

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

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

Status: Open.

#57524 In pandas-dev/pandas;

· Bjoern-Rapp opened on Feb 20, 2024