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API/ENH: dtype='string' / pd.String

Enhancement

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

StringsString extension data type and string dataString extension data type and string data

Status: Closed (completed).

#8640 In pandas-dev/pandas;

· by jreback was closed on Oct 17, 2022

FUT: logging option for future changes

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

Status: Closed (completed).

#15703 In pandas-dev/pandas;

· by jreback was closed on Dec 26, 2019

Bug: groupby(..., observed=True) doesn't respect sort key

Bug

CategoricalCategorical Data TypeCategorical Data Type

Groupby

Status: Closed (completed).

#27369 In pandas-dev/pandas;

· by topper-123 was closed on Dec 6, 2022

Index(SparseArray([int])) has object type

Bug

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

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

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

Status: Closed (completed).

#26972 In pandas-dev/pandas;

· by TomAugspurger was closed on Nov 1, 2022

ENH: add option to get nullable dtypes to pd.read_csv

Enhancement

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#36712 In pandas-dev/pandas;

· by galipremsagar was closed on Oct 7, 2022

BUG: Cannot create third-party ExtensionArrays for datetime types

Bug

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

Timestamppd.Timestamp and associated methodspd.Timestamp and associated methods

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#34986 In pandas-dev/pandas;

· by xhochy was closed on Sep 19, 2022

Refactor StringMethods for extension arrays

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

RefactorInternal refactoring of codeInternal refactoring of code

StringsString extension data type and string dataString extension data type and string data

Status: Closed (completed).

#36216 In pandas-dev/pandas;

· by TomAugspurger was closed on Sep 30, 2020

BUG: IntervalIndex.astype("category") doesn't preserve exact interval dtype in categories

Astype

Bug

CategoricalCategorical Data TypeCategorical Data Type

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

IntervalInterval data typeInterval data type

Status: Closed (completed).

#38316 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Aug 29, 2022

BUG: DataFrame and Series constructor inconsistent in handling of Datetimelike object index

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

DatetimeDatetime data dtypeDatetime data dtype

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#39307 In pandas-dev/pandas;

· by phofl was closed on Oct 18, 2022

DEPR: log of deprecations in 1.x (to be removed in 2.0)

AdminAdministrative tasks related to the pandas projectAdministrative tasks related to the pandas project

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issues

Status: Closed (completed).

#30228 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Feb 8, 2023

Groupby.transform returns data with incorrect indexing when grouping on categoricals with missing values

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

Bug

CategoricalCategorical Data TypeCategorical Data Type

Groupby

Status: Closed (completed).

#28788 In pandas-dev/pandas;

· by CassonStallings was closed on Dec 6, 2022

BUG: Memory leak in json encoding for time related objects

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#40443 In pandas-dev/pandas;

· by Dollars was closed on Jan 18, 2023

str.replace('.','') should replace every character?

Bug

StringsString extension data type and string dataString extension data type and string data

Status: Closed (completed).

#24804 In pandas-dev/pandas;

· by ThibTrip was closed on Nov 3, 2022

CLN: Refactor groupby's _make_wrapper

Clean

Groupby

Status: Closed (completed).

#48028 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 12, 2022

BUG: Union of multi index with EA types can lose EA dtype

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.

MultiIndex

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

Status: Closed (completed).

#48032 In pandas-dev/pandas;

· by ssche was closed on Oct 14, 2022

BUG: DataFrameGroupBy.value_counts when grouper has a frequency

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

Bug

Groupby

Status: Closed (completed).

#47286 In pandas-dev/pandas;

· by LucasG0 was closed on Jan 8, 2023

BUG: when re-index is filling values for both index and columns with dtype uint8 the filled values are incorrect

Bug

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

Status: Closed (completed).

#48184 In pandas-dev/pandas;

· by KerimovEmil was closed on Aug 31, 2022

DOC: Signature information for groupby.aggregate does not include Named Aggregation

Docs

Groupby

Status: Closed (completed).

#47974 In pandas-dev/pandas;

· by DRudel was closed on Dec 17, 2022

DOC: Include SeriesGroupBy ops in API docs

Docs

Enhancement

Groupby

Status: Closed (completed).

#48399 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 15, 2022

BUG: Appending or concatenating to empty ExtensionArray removes type information

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

good first issue

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

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

Status: Closed (completed).

#48510 In pandas-dev/pandas;

· by ssche was closed on Sep 15, 2022

CI: Improve warning when no pandas dev version installed when running stubtest

CIContinuous IntegrationContinuous Integration

good first issue

Typingtype annotations, mypy/pyright type checkingtype annotations, mypy/pyright type checking

Status: Closed (completed).

#48260 In pandas-dev/pandas;

· by phofl was closed on Aug 26, 2022

API: Timestamp and Timedelta .value changing in 2.0

Non-Nanodatetime64/timedelta64 with non-nanosecond resolutiondatetime64/timedelta64 with non-nanosecond resolution

TimedeltaTimedelta data typeTimedelta data type

Timestamppd.Timestamp and associated methodspd.Timestamp and associated methods

Status: Closed (completed).

#49076 In pandas-dev/pandas;

· by jbrockmendel was closed on Feb 9, 2023

BUG/API: Indexes on empty frames/series should be RangeIndex, are Index[object]

Bug

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

DataFrameDataFrame data structureDataFrame data structure

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

Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team member

SeriesSeries data structureSeries data structure

Status: Closed (completed).

#49572 In pandas-dev/pandas;

· by topper-123 was closed on Dec 7, 2022

Datetime parsing (PDEP-4): allow mixture of ISO formatted strings?

DatetimeDatetime data dtypeDatetime data dtype

Status: Closed (completed).

#50411 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Feb 14, 2023

DOC: DataFrame.count_values supports single label

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

Docs

good first issue

Testingpandas testing functions or related to the test suitepandas testing functions or related to the test suite

Status: Closed (completed).

#50829 In pandas-dev/pandas;

· by mattf was closed on Feb 20, 2023