Search results

REGR: DataFrame.transpose resulting in not contiguous data on nullable EAs

Bug

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

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

Status: Merged (completed).

pandas-dev/pandasnumber 57474

#57474 In pandas-dev/pandas;

· by rhshadrach was closed on Feb 18, 2024

· 

2.2.1

Potential perf regressions introduced by Copy-on-Write

Copy / view semantics

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Open.

#57431 In pandas-dev/pandas;

· rhshadrach opened on Feb 15, 2024

DEPR: Add note to groupby docstring about deprecation of axis=1

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Docs

good first issue

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

Status: Closed (completed).

#54873 In pandas-dev/pandas;

· by rhshadrach was closed on Aug 31, 2023

· 

2.1.1

REGR: DataFrame.stack was sometimes sorting resulting index

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

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

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

Status: Closed (completed).

#53969 In pandas-dev/pandas;

· by rhshadrach was closed on Jul 13, 2023

· 

2.1

REGR: SeriesGroupBy.agg with multiple categoricals, as_index=False, and a list fails

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

Bug

CategoricalCategorical Data TypeCategorical Data Type

Groupby

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

Status: Merged (completed).

pandas-dev/pandasnumber 52850

#52850 In pandas-dev/pandas;

· by rhshadrach was closed on Apr 22, 2023

· 

2.0.1

REGR: DataFrame.resample fails on a frame with no columns

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

Resampleresample methodresample method

Status: Merged (completed).

pandas-dev/pandasnumber 52615

#52615 In pandas-dev/pandas;

· by rhshadrach was closed on Apr 20, 2023

· 

2.0.1

REGR: groupby.size with axis=1 doesn't return a Series

Bug

Groupby

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

Status: Merged (completed).

pandas-dev/pandasnumber 48760

#48760 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 26, 2022

· 

1.5.1

REGR: Performance decrease in factorize

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Merged (completed).

pandas-dev/pandasnumber 48620

#48620 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 22, 2022

· 

1.5.1

REGR: Adding a row via DataFrame.at

Bug

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

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

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

Status: Closed (completed).

#48296 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 1, 2022

· 

1.5

REGR: Resampler.aggregate fails when used with column selection

Bug

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

Resampleresample methodresample method

Status: Merged (completed).

pandas-dev/pandasnumber 43410

#43410 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 6, 2021

· 

1.3.3

REG: DataFrame/Series.transform with list and non-list dict values

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

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

Status: Merged (completed).

pandas-dev/pandasnumber 40090

#40090 In pandas-dev/pandas;

· by rhshadrach was closed on Feb 27, 2021

· 

1.2.3

BUG: DataFrame/Series.transform with list and non-list dict values

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

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

Status: Closed (completed).

#40018 In pandas-dev/pandas;

· by rhshadrach was closed on Feb 27, 2021

· 

1.2.3