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BUG: writing categorical of intervals (pd.cut() output) to Parquet is not supported

IntervalInterval data typeInterval data type

IO Parquetparquet, featherparquet, feather

Status: Open.

#62235 In pandas-dev/pandas;

· jorisvandenbossche opened on Sep 2, 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

ENH: No longer always show hour, minute and second components for pd.Interval

Bug

IntervalInterval data typeInterval data type

Output-Formatting__repr__ of pandas objects, to_string__repr__ of pandas objects, to_string

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

Status: Open.

#57748 In pandas-dev/pandas;

· ClaireDons opened on Mar 6, 2024

BUG: <code>pd.cut</code> with <code>IntervalIndex</code> produces unexpected results when <code>freq</code> of data and bins differ

Bug

IntervalInterval data typeInterval 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.

#56764 In pandas-dev/pandas;

· bollard opened on Jan 7, 2024

DEPR: values casting dt64tz, Interval, Period

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

DatetimeDatetime data dtypeDatetime data dtype

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

IntervalInterval data typeInterval data type

PeriodPeriod data typePeriod data type

Status: Open.

#54717 In pandas-dev/pandas;

· jbrockmendel opened on Aug 23, 2023

ENH: <code>__contains__</code> between <code>pd.Series</code> and <code>pd.Interval</code>

Enhancement

IntervalInterval data typeInterval data type

SeriesSeries data structureSeries data structure

Status: Open.

#53843 In pandas-dev/pandas;

· matteosantama opened on Jun 25, 2023

ENH: Create Better IntervalDtype using PyArrow structs.

Arrowpyarrow functionalitypyarrow functionality

Enhancement

IntervalInterval data typeInterval data type

Status: Open.

#53033 In pandas-dev/pandas;

· randolf-scholz opened on May 2, 2023

ENH: pd.cut closed intervals

cutcut, qcutcut, qcut

Enhancement

Groupby

IntervalInterval data typeInterval data type

Status: Open.

#51534 In pandas-dev/pandas;

· Gabriel-Kissin opened on Feb 21, 2023

NotImplementedError: method backfill not yet implemented for IntervalIndex

Enhancement

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

IntervalInterval data typeInterval data type

Status: Open.

#51503 In pandas-dev/pandas;

· ValueRaider opened on Feb 20, 2023

BUG: panda._testing.assert_interval_array_equal no longer checks "exact" parameter

Bug

IntervalInterval data typeInterval data type

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

Status: Open.

#49198 In pandas-dev/pandas;

· venaturum opened on Oct 20, 2022

BUG: pd.cut creates NaNs instead of expected bins for Timestamps. Behaviour is DIFFERENT for list and Series, with IntervalIndex and DatetimeIndex

Bug

cutcut, qcutcut, qcut

DatetimeDatetime data dtypeDatetime data dtype

IntervalInterval data typeInterval data type

Status: Open.

#48083 In pandas-dev/pandas;

· VladimirFokow opened on Aug 15, 2022

PERF: cut with IntervalIndex slower than cut with array of bin edges for large arrays

cutcut, qcutcut, qcut

IntervalInterval data typeInterval data type

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#47614 In pandas-dev/pandas;

· dcherian opened on Jul 6, 2022