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BRANCH: libpandas native core experiments

Status: Closed (abandoned).

pandas-dev/pandasnumber 11960

#11960 In pandas-dev/pandas;

· by wesm was closed on Jan 6, 2016

DOC: Design drafts to assist with next-gen pandas internals discussion

API Design

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

Docs

Status: Closed (abandoned).

pandas-dev/pandasnumber 13944

#13944 In pandas-dev/pandas;

· by wesm was closed on Aug 24, 2016

BUG: Series constructor not respecting CoW when called with BlockManager

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52017

#52017 In pandas-dev/pandas;

· by phofl was closed on Mar 29, 2023

API / CoW: Copy arrays by default in Series constructor

Copy / view semantics

SeriesSeries data structureSeries data structure

Status: Merged (completed).

pandas-dev/pandasnumber 52022

#52022 In pandas-dev/pandas;

· by phofl was closed on Mar 29, 2023

BUG-CoW: from_records not tracking references when called with df

Copy / view semantics

DataFrameDataFrame data structureDataFrame data structure

Status: Merged (completed).

pandas-dev/pandasnumber 52029

#52029 In pandas-dev/pandas;

· by phofl was closed on Mar 17, 2023

Backport PR #52014 on branch 2.0.x (DOC Change slack invitation from email to link)

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 52026

#52026 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 16, 2023

Backport PR #51950 on branch 2.0.x (BUG: Series.getitem not respecting CoW with MultiIndex)

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52005

#52005 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 16, 2023

Backport PR #51788 on branch 2.0.x (DOC: Add section about copy on write and mutating objects)

Copy / view semantics

Docs

Status: Merged (completed).

pandas-dev/pandasnumber 52006

#52006 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 16, 2023

Backport PR #51834: CoW: Set copy=False in internal usages of Series/DataFrame constructors

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52012

#52012 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Mar 16, 2023

Backport PR #51803 on branch 2.0.x (CoW: Add reference tracking to index when created from series)

Copy / view semantics

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

Status: Merged (completed).

pandas-dev/pandasnumber 52000

#52000 In pandas-dev/pandas;

· by phofl was closed on Mar 16, 2023

Backport PR #51302 on branch 2.0.x (ENH: Enable more Arrow CSV tests/features)

Arrowpyarrow functionalitypyarrow functionality

IO CSVread_csv, to_csvread_csv, to_csv

Status: Merged (completed).

pandas-dev/pandasnumber 51998

#51998 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 15, 2023

BUG - CoW: Series with MultiIndex with tuples does not respect CoW

Copy / view semantics

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

MultiIndex

Status: Merged (completed).

pandas-dev/pandasnumber 52001

#52001 In pandas-dev/pandas;

· by phofl was closed on Mar 16, 2023

Backport PR #52010 on branch 2.0.x (DEPS: Filter numpy's FutureWarning from array_equal)

Upstream issueIssue related to pandas dependencyIssue related to pandas dependency

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

Status: Closed (abandoned).

pandas-dev/pandasnumber 52013

#52013 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 16, 2023

DEPR: Properly enforce group_keys defaulting to False in resample

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Groupby

Resampleresample methodresample method

Status: Merged (completed).

pandas-dev/pandasnumber 52071

#52071 In pandas-dev/pandas;

· by rhshadrach was closed on Mar 19, 2023

BUG: Arrow setitem segfaults when len > 145 000

Arrowpyarrow functionalitypyarrow functionality

Status: Merged (completed).

pandas-dev/pandasnumber 52075

#52075 In pandas-dev/pandas;

· by phofl was closed on Mar 27, 2023

BUG: Fix regression when using Series with arrow string array

Arrowpyarrow functionalitypyarrow functionality

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 52076

#52076 In pandas-dev/pandas;

· by phofl was closed on Mar 22, 2023

Backport PR #52071: DEPR: Properly enforce group_keys defaulting to False in resample

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Groupby

Resampleresample methodresample method

Status: Merged (completed).

pandas-dev/pandasnumber 52078

#52078 In pandas-dev/pandas;

· by rhshadrach was closed on Mar 19, 2023

CoW: Set copy=False explicitly internally for Series and DataFrame in io/pytables

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52032

#52032 In pandas-dev/pandas;

· by phofl was closed on Mar 17, 2023

BUG-CoW: DataFrame constructed from Series not respecting CoW

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52031

#52031 In pandas-dev/pandas;

· by phofl was closed on Mar 29, 2023

CoW: Optimize Series.reset_index to make lazy copy

Copy / view semantics

Status: Merged (completed).

pandas-dev/pandasnumber 52040

#52040 In pandas-dev/pandas;

· by phofl was closed on Mar 17, 2023

BUG: Remove unnecessary validation to non-string columns/index in df.to_parquet

IO Parquetparquet, featherparquet, feather

Status: Merged (completed).

pandas-dev/pandasnumber 52036

#52036 In pandas-dev/pandas;

· by mroeschke was closed on Mar 17, 2023

Backport PR #51631 on branch 2.0.x (BUG: Series.any and Series.all for empty or all-null pyarrow-backed dtypes)

Arrowpyarrow functionalitypyarrow functionality

Status: Merged (completed).

pandas-dev/pandasnumber 51999

#51999 In pandas-dev/pandas;

· by phofl was closed on Mar 15, 2023

Backport PR #52001 on branch 2.0.x (BUG - CoW: Series with MultiIndex with tuples does not respect CoW)

Copy / view semantics

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

MultiIndex

Status: Merged (completed).

pandas-dev/pandasnumber 52009

#52009 In pandas-dev/pandas;

· by meeseeksmachine was closed on Mar 16, 2023

CoW: Avoid copying Index in Series constructor

Copy / view semantics

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

SeriesSeries data structureSeries data structure

Status: Merged (completed).

pandas-dev/pandasnumber 52008

#52008 In pandas-dev/pandas;

· by phofl was closed on Mar 17, 2023

PERF: Fix performance regression in read_csv when converting datetimes

IO CSVread_csv, to_csvread_csv, to_csv

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 52057

#52057 In pandas-dev/pandas;

· by phofl was closed on Mar 29, 2023