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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

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

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

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

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

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

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: 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

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

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

DEPR: Remove Int64Index, UInt64Index, Float64Index and Index._is_backward_compat_public_numeric_index

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).

#42717 In pandas-dev/pandas;

· by topper-123 was closed on Feb 3, 2023

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

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

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

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: Spurious "FutureWarning: Use pd.to_datetime instead."

Bug

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

IO CSVread_csv, to_csvread_csv, to_csv

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Closed (completed).

#47576 In pandas-dev/pandas;

· by lafrech was closed on Dec 9, 2022

RLS: 2.0

Release

Status: Closed (completed).

#46776 In pandas-dev/pandas;

· by simonjayhawkins was closed on Apr 3, 2023

BUG: very slow groupby(col1)[col2].value_counts() for columns of type 'category'

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

Bug

CategoricalCategorical Data TypeCategorical Data Type

Groupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#46202 In pandas-dev/pandas;

· by whypandasslow was closed on Jan 11, 2023

PERF: Slow performance of <code>to_dict("records")</code>

IO DataIO issues that don't fit into a more specific labelIO issues that don't fit into a more specific label

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#46470 In pandas-dev/pandas;

· by RogerThomas was closed on Nov 22, 2022

DOC: groupby Automatic exclusion of “nuisance” columns

Docs

Groupby

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

Status: Closed (completed).

#46415 In pandas-dev/pandas;

· by arnaudlegout was closed on Feb 26, 2023

BUG: to_datetime(..., infer_datetime_format=True) fails if argument is np.str_

Bug

DatetimeDatetime data dtypeDatetime data dtype

Status: Closed (completed).

#48969 In pandas-dev/pandas;

· by MarcoGorelli was closed on Oct 6, 2022

BUG: pd.compare does not recognize differences with the nullable Int64 data type

Bug

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

Status: Closed (completed).

#48939 In pandas-dev/pandas;

· by sergiykhan was closed on Oct 14, 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