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ENH: Allow storing ExtensionArrays in containers

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Enhancement

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 19520

#19520 In pandas-dev/pandas;

· by TomAugspurger was closed on Feb 23, 2018

Array Interface and Categorical internals Refactor

Enhancement

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 19268

#19268 In pandas-dev/pandas;

· by TomAugspurger was closed on Feb 2, 2018

· 

0.23.0

WIP/API/ENH: IntervalIndex

API Design

Enhancement

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

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

IntervalInterval data typeInterval data type

Status: Closed (abandoned).

pandas-dev/pandasnumber 8707

#8707 In pandas-dev/pandas;

· by shoyer was closed on Sep 9, 2016

ENH: create Timedelta scalar / TimedeltaIndex

API Design

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

TimedeltaTimedelta data typeTimedelta data type

Status: Merged (completed).

pandas-dev/pandasnumber 8184

#8184 In pandas-dev/pandas;

· by jreback was closed on Sep 13, 2014

· 

0.15.0

[ArrayManager] REF: Implement concat with reindexing

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

RefactorInternal refactoring of codeInternal refactoring of code

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

Status: Merged (completed).

pandas-dev/pandasnumber 39612

#39612 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Apr 12, 2021

· 

1.3

CLN: use integer parsing functions from stdlib

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 62658

#62658 In pandas-dev/pandas;

· by Alvaro-Kothe was closed on Oct 16, 2025

· 

3.0

PERF: block-wise arithmetic for frame-with-frame

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 32779

#32779 In pandas-dev/pandas;

· by jbrockmendel was closed on May 19, 2020

· 

1.1

POC: ArrayManager -- array-based data manager for columnar store

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

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

RefactorInternal refactoring of codeInternal refactoring of code

Status: Merged (completed).

pandas-dev/pandasnumber 36010

#36010 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 13, 2021

· 

1.3

API: add DatetimeBlockTZ #8260

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

PerformanceMemory or execution speed performanceMemory or execution speed performance

TimezonesTimezone data dtypeTimezone data dtype

Status: Merged (completed).

pandas-dev/pandasnumber 10477

#10477 In pandas-dev/pandas;

· by jreback was closed on Sep 5, 2015

· 

0.17.0

CLN/INT: remove Index as a sub-class of NDArray

API Design

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

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

MultiIndex

RefactorInternal refactoring of codeInternal refactoring of code

Status: Merged (completed).

pandas-dev/pandasnumber 7891

#7891 In pandas-dev/pandas;

· by jreback was closed on Aug 7, 2014

· 

0.15.0

Separate parsing functions out from tslib

Clean

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 17363

#17363 In pandas-dev/pandas;

· by jbrockmendel was closed on Sep 26, 2017

· 

0.21.0

ENH: implement DatetimeLikeArray

Enhancement

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

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

Status: Merged (completed).

pandas-dev/pandasnumber 19902

#19902 In pandas-dev/pandas;

· by jbrockmendel was closed on Jul 2, 2018

· 

0.24.0