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BUG: Series.mask incorrectly replaces positions of pd.NA in the cond argument

Arrowpyarrow functionalitypyarrow functionality

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

Status: Open.

#60729 In pandas-dev/pandas;

· kartoria opened on Jan 18, 2025

TST (string dtype): clean-up interpolate tests

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

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

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

Status: Open (in progress).

pandas-dev/pandasnumber 60653

#60653 In pandas-dev/pandas;

· jorisvandenbossche opened on Jan 3, 2025

 ·  

3.0

BUG: MultiIndex union/difference not commutative

Bug

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

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

MultiIndex

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

setopsunion, intersection, difference, symmetric_differenceunion, intersection, difference, symmetric_difference

Status: Open.

#60642 In pandas-dev/pandas;

· ssche opened on Jan 2, 2025

BUG: groupby with dropna=False and pa.dictionary drops NA values

Arrowpyarrow functionalitypyarrow functionality

Groupby

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

Status: Open.

#60567 In pandas-dev/pandas;

· rhshadrach opened on Dec 14, 2024

BUG?: using None as replacement value in replace() typically upcasts to object dtype

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

Bug

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

replacereplace methodreplace method

Status: Open.

#60284 In pandas-dev/pandas;

· jorisvandenbossche opened on Nov 12, 2024

ENH: Add area_limit to `fillna

Enhancement

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

Status: Open.

#60161 In pandas-dev/pandas;

· joshdunnlime opened on Oct 31, 2024

BUG: fix #59965 skipna=True operations don't skip NaN in FloatingArrays

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

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

Stale

Status: Open (in progress).

pandas-dev/pandasnumber 59997

#59997 In pandas-dev/pandas;

· cooolheater opened on Oct 7, 2024

BUG: skipna=True operations don't skip NaN in FloatingArrays

Bug

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

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

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

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

Status: Open.

#59965 In pandas-dev/pandas;

· carlocastoldi opened on Oct 4, 2024

ENH: Restore the functionality of .fillna

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Enhancement

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

Needs InfoClarification about behavior needed to assess issueClarification about behavior needed to assess issue

Status: Open.

#59831 In pandas-dev/pandas;

· tomprimozic opened on Sep 18, 2024

API: handling of missing values in Index.__contains__

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

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

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

Status: Open.

#59765 In pandas-dev/pandas;

· jorisvandenbossche opened on Sep 9, 2024

BUG: converting null timedelta to int with astype() changes NaT to -9223372036854775808

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

Status: Open.

#59711 In pandas-dev/pandas;

· sfc-gh-mvashishtha opened on Sep 4, 2024

BUG: isna on pyarrow backed Series is returning Series with bool dtype instead of bool[pyarrow]

Bug

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

pyarrow dtype retentionop with pyarrow dtype -> expect pyarrow resultop with pyarrow dtype -> expect pyarrow result

Status: Open.

#59431 In pandas-dev/pandas;

· thesword53 opened on Aug 6, 2024