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BUG: for ordered categorical data implements correct computation of kendall/spearman correlations

Bug

CategoricalCategorical Data TypeCategorical Data Type

cov/corr

Status: Open (in progress).

pandas-dev/pandasnumber 62880

#62880 In pandas-dev/pandas;

· pandeconscious opened on Oct 27, 2025

·  

3.0

ENH: Infer enums as categories

CategoricalCategorical Data TypeCategorical Data Type

Enhancement

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

Status: Open.

#62207 In pandas-dev/pandas;

· JensHeinrich opened on Aug 28, 2025

BUG: ArrowEA.astype to categorical returning all-NaT

Arrowpyarrow functionalitypyarrow functionality

Bug

CategoricalCategorical Data TypeCategorical Data Type

datetime.datestdlib datetime.date supportstdlib datetime.date support

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Open.

#62051 In pandas-dev/pandas;

· jbrockmendel opened on Aug 5, 2025

BUG: <code>assert_series_equal</code> broken with <code>check_category_order=False</code> for arrays with null values

Bug

CategoricalCategorical Data TypeCategorical Data Type

Status: Open.

#62008 In pandas-dev/pandas;

· fjetter opened on Jul 31, 2025

indexing with a <code>Categorical</code> of <code>Interval</code>s is inefficient

CategoricalCategorical Data TypeCategorical Data Type

IntervalInterval data typeInterval data type

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#61928 In pandas-dev/pandas;

· flying-sheep opened on Jul 23, 2025

BUG: mapping categorical with single category to boolean returns category instead of bool dtype

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

Bug

CategoricalCategorical Data TypeCategorical Data Type

Status: Open.

#61719 In pandas-dev/pandas;

· kdebrab opened on Jun 27, 2025

DEPR: Make <code>dtype="category"</code> always imply ordered=False

CategoricalCategorical Data TypeCategorical Data Type

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#61074 In pandas-dev/pandas;

· mroeschke opened on Mar 7, 2025

ENH: Add the <code>observed</code> parameter to <code>get_dummies</code>

CategoricalCategorical Data TypeCategorical Data Type

Enhancement

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

Status: Open.

#60585 In pandas-dev/pandas;

· alonme opened on Dec 17, 2024

BUG: Parquet roundtrip fails with numerical categorical dtype

Bug

CategoricalCategorical Data TypeCategorical Data Type

IO Parquetparquet, featherparquet, feather

Status: Open.

#60491 In pandas-dev/pandas;

· adrienpacifico opened on Dec 4, 2024

ENH: Allow <code>select_dtypes("category")</code> to identify <code>ArrowDtype(pa.dictionary))</code>

Arrowpyarrow functionalitypyarrow functionality

CategoricalCategorical Data TypeCategorical Data Type

Enhancement

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

Status: Open.

#58636 In pandas-dev/pandas;

· nachomaiz opened on May 8, 2024

BUG: <code>NotImplementedError |S8</code> when converting categories from object containing byte arrays to bytes

Astype

Bug

BytesDtype

CategoricalCategorical Data TypeCategorical Data Type

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

Status: Open.

#57925 In pandas-dev/pandas;

· smarie opened on Mar 20, 2024

BUG: DataFrame([Series with different CategoricalIndexes]) results in non-Categorical columns

CategoricalCategorical Data TypeCategorical Data Type

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

DataFrameDataFrame data structureDataFrame data structure

Status: Open.

#57592 In pandas-dev/pandas;

· mroeschke opened on Feb 23, 2024