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BUG: fix SeriesGroupBy.plot does not respect cmap parameter

Bug

Groupby

Visualizationplottingplotting

Status: Open (in progress).

pandas-dev/pandasnumber 62671

#62671 In pandas-dev/pandas;

· zhuoyahuang opened on Oct 12, 2025

ENH: Consistent <code>name</code> property for the iterates in <code>DataFrameGroupBy</code>

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

Bug

Enhancement

Groupby

Status: Open.

#62141 In pandas-dev/pandas;

· FelixBenning opened on Aug 18, 2025

BUG: series.groupby(level=0) and series.groupby(pd.Grouper(level=0)) produce different orders

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

Bug

Groupby

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

Status: Open.

#61943 In pandas-dev/pandas;

· sfc-gh-mvashishtha opened on Jul 25, 2025

BUG: <code>rank</code> gives incorrect outputs on Windows with PyArrow backend

Bug

Groupby

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Upstream issueIssue related to pandas dependencyIssue related to pandas dependency

Status: Open.

#61896 In pandas-dev/pandas;

· MarcoGorelli opened on Jul 18, 2025

BUG: Calling dict(df.groupby(...)) raises TypeError: 'str' object is not callable despite valid inputs

Bug

Groupby

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

Status: Open.

#61772 In pandas-dev/pandas;

· ykayz opened on Jul 3, 2025

BUG: way to include all columns within a groupby apply

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

Bug

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Groupby

Status: Open.

#61406 In pandas-dev/pandas;

· madelavar12 opened on May 8, 2025

BUG: Dropped Index Name on Aggregated Index Column with MultiIndexed DataFrame

Bug

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Groupby

Status: Open.

#60603 In pandas-dev/pandas;

· RahimD opened on Dec 24, 2024

API: pass <code>ddof</code> down to Cythonised <code>std</code> / <code>var</code> in <code>groupby.agg</code>

API Design

Groupby

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

Reduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.

Status: Open.

#60591 In pandas-dev/pandas;

· MarcoGorelli opened on Dec 20, 2024

BUG: <code>transform("cumcount")</code> returns a Series instead of a Dataframe.

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

Bug

Groupby

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

Status: Open.

#60551 In pandas-dev/pandas;

· ClaudioSalvatoreArcidiacono opened on Dec 12, 2024

PERF: <code>dropna</code> with <code>SparseArray</code> experiments a much worse time complexity

Groupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

SparseSparse Data TypeSparse Data Type

Status: Open.

#60179 In pandas-dev/pandas;

· mflova opened on Nov 4, 2024

ENH: Should groupby's <code>value_counts</code> sorts on <code>count</code> before <code>proportion</code> is computed

AlgosNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diffNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff

Enhancement

Groupby

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

Status: Open.

#59725 In pandas-dev/pandas;

· sfc-gh-joshi opened on Sep 5, 2024

BUG: inconsistent indices in <code>GroupByRolling</code> when selecting or not selecting subset of columns

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

Bug

Groupby

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Open.

#59567 In pandas-dev/pandas;

· inigohidalgo opened on Aug 20, 2024