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BUG: <code>.loc[:, [*labels]]</code> inconsistently reorders <code>MultiIndex</code>ed <code>Series</code> and <code>DataFrame</code>s

Bug

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

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#63187 In pandas-dev/pandas;

· QuaternionsRock opened on Nov 24, 2025

DOC: clarify that <code>value_counts</code>, <code>sort_values</code>, <code>sort_index</code> etc. are deterministic

Docs

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#63154 In pandas-dev/pandas;

· cmp0xff opened on Nov 19, 2025

BUG: <code>sort_index</code> failing on MultiIndex with label name when key is used

Bug

MultiIndex

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#62361 In pandas-dev/pandas;

· ldouteau opened on Sep 17, 2025

BUG: remove_unused_levels does not keep index levels order

Bug

MultiIndex

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

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#61245 In pandas-dev/pandas;

· mathman79 opened on Apr 7, 2025

ENH: Enable nsmallest/nlargest on object dtype

Enhancement

Filterse.g. head, tail, nthe.g. head, tail, nth

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#61166 In pandas-dev/pandas;

· Gri72 opened on Mar 22, 2025

BUG: <code>sort_values</code> is sorting the index too when <code>ignore_index=False</code>

Bug

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#57531 In pandas-dev/pandas;

· galipremsagar opened on Feb 20, 2024

ENH: Better documentation or default behavior for GroupBy for columns with non-sortable values

Enhancement

Groupby

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

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#57525 In pandas-dev/pandas;

· gabuzi opened on Feb 20, 2024

BUG: <code>sort_values</code> should have consistent behavior irrespective of the number of sort columns

Bug

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#57312 In pandas-dev/pandas;

· arpit-goel opened on Feb 9, 2024

BUG: sort_values raises error about null categorical values when no categorical types are used

Arrowpyarrow functionalitypyarrow functionality

Bug

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Status: Open.

#54908 In pandas-dev/pandas;

· rohanjain101 opened on Aug 31, 2023

BUG: groupby sort issue when using rolling

Bug

Groupby

Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_values

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Open.

#50296 In pandas-dev/pandas;

· domjanbaric opened on Dec 16, 2022