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BUG: Outer merge casts EA dtype to object

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

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).

#40073 In pandas-dev/pandas;

· by adaitche was closed on Sep 3, 2021

RLS: 1.3.3

Release

Status: Closed (completed).

#43050 In pandas-dev/pandas;

· by simonjayhawkins was closed on Sep 12, 2021

Combination of groupby with dropna set to True and apply function not returning expected output

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

Bug

Groupby

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

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

Status: Closed (completed).

#43205 In pandas-dev/pandas;

· by deponovo was closed on Sep 6, 2021

BUG: <code>RangeIndex.where</code> throws AssertionError

Bug

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

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

Status: Closed (completed).

#43240 In pandas-dev/pandas;

· by galipremsagar was closed on Aug 27, 2021

BUG: Regression from 1.2.5 to 1.3.x: groupby using sum on DataFrame containing lists fails

Bug

Duplicate ReportDuplicate issue or pull requestDuplicate issue or pull request

Groupby

Nested DataData where the values are collections (lists, sets, dicts, objects, etc.).Data where the values are collections (lists, sets, dicts, objects, etc.).

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

Status: Closed (completed).

#43108 In pandas-dev/pandas;

· by Dr-Irv was closed on Aug 24, 2021

DataFrameGroupBy.aggregate engine='numba' doesn't pass index

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

Bug

Groupby

numbanumba-accelerated operationsnumba-accelerated operations

Status: Closed (completed).

#43133 In pandas-dev/pandas;

· by richbwood was closed on Aug 27, 2021

REGR: 1.3 invalid exclusion of nuisance columns with groupby aggregation

Bug

Docs

Duplicate ReportDuplicate issue or pull requestDuplicate issue or pull request

Groupby

Nuisance ColumnsIdentifying/Dropping nuisance columns in reductions, groupby.add, DataFrame.applyIdentifying/Dropping nuisance columns in reductions, groupby.add, DataFrame.apply

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

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

Status: Closed (completed).

#43380 In pandas-dev/pandas;

· by joseph-wakeling-frequenz was closed on Sep 11, 2021

BUG: Regression in 1.3.0: Exception when setting arrays as cell values

Bug

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

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

Status: Closed (completed).

#43422 In pandas-dev/pandas;

· by felixdivo was closed on Sep 7, 2021

BUG: Series.fillna raising with <code>float32</code> dtype when using value arg

Bug

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

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

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

Status: Closed (completed).

#43424 In pandas-dev/pandas;

· by mzeitlin11 was closed on Sep 9, 2021

BUG: Cythonized kendall correlation implementation is incorrect

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

Bug

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: Closed (completed).

#43401 In pandas-dev/pandas;

· by zrait was closed on Sep 6, 2021

BUG: SpooledTemporaryFile no longer working with read_csv

Bug

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#43439 In pandas-dev/pandas;

· by oskli was closed on Sep 10, 2021

BUG: pandas 1.3.2 incompatible with fastparquet 0.7.0

Bug

IO Parquetparquet, featherparquet, feather

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

Status: Closed (completed).

#43075 In pandas-dev/pandas;

· by mmac-m3a was closed on Sep 1, 2021

BUG: Slicing on Datetimeindex fails

Bug

DatetimeDatetime data dtypeDatetime data dtype

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

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

Status: Closed (completed).

#43223 In pandas-dev/pandas;

· by benHeid was closed on Sep 9, 2021

BUG: GroupBy's quantile incompatible with pd.NA

Bug

Groupby

NA - MaskedArraysRelated to pd.NA and nullable extension arraysRelated to pd.NA and nullable extension arrays

quantilequantile methodquantile method

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

Status: Closed (completed).

#42849 In pandas-dev/pandas;

· by JP-Ellis was closed on Sep 4, 2021

BUG: DataFrame constructor fails to repeat length-1 list to length of index if it contains a Timestamp/datetime64

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

DatetimeDatetime data dtypeDatetime data dtype

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

Status: Closed (completed).

#42810 In pandas-dev/pandas;

· by RobbieClarken was closed on Aug 17, 2021

BUG: RecursionError using <code>agg</code> on a resampled SeriesGroupBy

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

Bug

Groupby

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

Resampleresample methodresample method

Status: Closed (completed).

#42905 In pandas-dev/pandas;

· by manoelpqueiroz was closed on Sep 6, 2021

Python 3.10 manylinux wheels

BuildLibrary building on various platformsLibrary building on various platforms

Python 3.10

Status: Closed (completed).

#42946 In pandas-dev/pandas;

· by hrnciar was closed on Sep 12, 2021

BUG: DataFrame.groupby drops timedelta column in v1.3.0

Bug

Groupby

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

Status: Closed (completed).

#42395 In pandas-dev/pandas;

· by venaturum was closed on Sep 9, 2021

BUG: Regression on SeriesGrouper using Timestamp index with pandas 1.3.0

DatetimeDatetime data dtypeDatetime data dtype

Groupby

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

Status: Closed (completed).

#42390 In pandas-dev/pandas;

· by philpep was closed on Aug 17, 2021

REGR: rolling.EWMMethods.time_ewm

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

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#42333 In pandas-dev/pandas;

· by simonjayhawkins was closed on Aug 16, 2021

BUG: Series.groupby fails with InvalidIndexError on time series with a tuple-named grouper.

Bug

Groupby

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

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

SeriesSeries data structureSeries data structure

Status: Closed (completed).

#42731 In pandas-dev/pandas;

· by ghost was closed on Sep 6, 2021

Backport PR #43145 on branch 1.3.x (REGR: Fix fastparquet 0.7.0 not being able to read a parquet file)

Bug

IO Parquetparquet, featherparquet, feather

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 43347

#43347 In pandas-dev/pandas;

· by meeseeksmachine was closed on Sep 1, 2021

CI: Fix Failing Doc Build

CIContinuous IntegrationContinuous Integration

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 43349

#43349 In pandas-dev/pandas;

· by alimcmaster1 was closed on Sep 1, 2021

Backport PR #43349 on branch 1.3.x (CI: Fix Failing Doc Build)

CIContinuous IntegrationContinuous Integration

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 43350

#43350 In pandas-dev/pandas;

· by meeseeksmachine was closed on Sep 1, 2021

REGR: SpooledTemporaryFile support in read_csv

Compatpandas objects compatability with Numpy or Python functionspandas objects compatability with Numpy or Python functions

IO CSVread_csv, to_csvread_csv, to_csv

Status: Merged (completed).

pandas-dev/pandasnumber 43447

#43447 In pandas-dev/pandas;

· by twoertwein was closed on Sep 10, 2021