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BUG: indexing a MultiIndex-ed DataFrame (only) with a scalar on a level and a slice on another doesn't drop a level

Bug

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

MultiIndex

Status: Open.

#62926 In pandas-dev/pandas;

· toobaz opened on Oct 30, 2025

BUG: loc raising error for MultiIndex with bool indexer _and first level of object dtype_

Bug

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

MultiIndex

Status: Open.

#50165 In pandas-dev/pandas;

· toobaz opened on Dec 10, 2022

Code for list of partial indexers should be in MultiIndex.get_indexer

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

MultiIndex

RefactorInternal refactoring of codeInternal refactoring of code

Status: Open.

#27181 In pandas-dev/pandas;

· toobaz opened on Jul 2, 2019

DataFrame.[key] and .loc[:, key] with non-unique columns returns frame if (and only if) columns are MultiIndex

Bug

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

MultiIndex

Status: Open.

#21309 In pandas-dev/pandas;

· toobaz opened on Jun 4, 2018

DataFrame.loc[] prioritizes columns when setting with missing label

Bug

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

MultiIndex

Status: Open.

#19110 In pandas-dev/pandas;

· toobaz opened on Jan 6, 2018

.loc with (scalar, slice(None)) on MultiIndex does not drop first level

Bug

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

MultiIndex

Status: Open.

#18631 In pandas-dev/pandas;

· toobaz opened on Dec 4, 2017

Wrong behavior and/or error message when assigning row with empty columns

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Bug

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

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

Status: Open.

#17895 In pandas-dev/pandas;

· toobaz opened on Oct 16, 2017

Asymmetric behavior between index and columns when getting incomplete label

Bug

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

Status: Open.

#17029 In pandas-dev/pandas;

· toobaz opened on Jul 19, 2017

Unintended cast to float when adding row with multiindex

Bug

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

MultiIndex

setitem-with-expansion

Status: Open.

#17026 In pandas-dev/pandas;

· toobaz opened on Jul 19, 2017

.loc with partial key flattens MultiIndex on index

API Design

Bug

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

MultiIndex

Status: Open.

#17024 In pandas-dev/pandas;

· toobaz opened on Jul 19, 2017

Incoherent behavior when ambiguously indexing MultiIndexed DataFrame with slice or list

Bug

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

MultiIndex

Status: Open.

#16396 In pandas-dev/pandas;

· toobaz opened on May 20, 2017

.loc with list of incomplete labels misbehaves or raises

Bug

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

MultiIndex

Status: Open.

#16083 In pandas-dev/pandas;

· toobaz opened on Apr 21, 2017