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usecols investigation for various I/O functions

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#61538 In pandas-dev/pandas;

· by eicchen was closed on Jun 3, 2025

PERF: Slow Windows / Ubuntu Unit Tests during Status Checks

CIContinuous IntegrationContinuous Integration

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

WindowsWindows OSWindows OS

Status: Closed (completed).

#61460 In pandas-dev/pandas;

· by MartinBraquet was closed on Jun 2, 2025

ENH: IDEA Introduce axis→0/axis→1 arrow aliases to disambiguate direction vs. label operations

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

Enhancement

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

Status: Closed (completed).

#61336 In pandas-dev/pandas;

· by withlionbuddha was closed on Apr 23, 2025

BUG: Negation of <code>.str.isnumeric()</code> changes <code>dtype</code> when <code>pd.NA</code> is present

Bug

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

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

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

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

Status: Closed (completed).

#61182 In pandas-dev/pandas;

· by noahblakesmith was closed on Apr 4, 2025

Preserve Complex Data Types for to_csv

ComplexComplex NumbersComplex Numbers

Enhancement

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (abandoned).

pandas-dev/pandasnumber 61157

#61157 In pandas-dev/pandas;

· by Jaspvr was closed on May 9, 2025

DOC: No warning in set_index() that previous index column is removed.

Docs

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

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

Status: Closed (completed).

#60973 In pandas-dev/pandas;

· by ncotie was closed on Mar 5, 2025

BUG: Union of two DateTimeIndexes is incorrectly calculated

Bug

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

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

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

Status: Closed (completed).

#60816 In pandas-dev/pandas;

· by filmor was closed on Jun 2, 2025

 ·  

2.3

ENH: Enable .mode to sort with NA values

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

Enhancement

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

Status: Merged (completed).

pandas-dev/pandasnumber 60702

#60702 In pandas-dev/pandas;

· by rhshadrach was closed on Jan 13, 2025

 ·  

2.3

API (string dtype): comparisons between different string classes

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

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

Numeric OperationsArithmetic, Comparison, and Logical operationsArithmetic, Comparison, and Logical operations

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

Status: Closed (completed).

#60639 In pandas-dev/pandas;

· by rhshadrach was closed on May 19, 2025

 ·  

2.3

[WIP] <code>df.apply</code>: add support for <code>engine='bodo'</code>

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

Status: Closed (abandoned).

pandas-dev/pandasnumber 60622

#60622 In pandas-dev/pandas;

· by scott-routledge2 was closed on Mar 15, 2025

BUG: Index.equals is not commutative for string and category dtypes

Bug

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

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

Status: Closed (completed).

#60194 In pandas-dev/pandas;

· by DhruvBShetty was closed on Nov 5, 2024

BUG: isna() does not catch np.NaN when datatype is Float64

Bug

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

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

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

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

Status: Closed (completed).

#60106 In pandas-dev/pandas;

· by mortnstak was closed on Oct 25, 2024