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BUG: Fix GroupBy aggregate coersion of outputs inconsistency for pyarrow dtypes

Arrowpyarrow functionalitypyarrow functionality

Bug

Groupby

Status: Open (in progress).

pandas-dev/pandasnumber 61640

#61640 In pandas-dev/pandas;

· heoh opened on Jun 12, 2025

Fix void dtype handling

Bug

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

Status: Draft (not ready).

pandas-dev/pandasnumber 61637

#61637 In pandas-dev/pandas;

· flying-sheep opened on Jun 12, 2025

BUG: Groupby aggregate coersion of outputs inconsistency for pyarrow dtypes

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Open.

#61636 In pandas-dev/pandas;

· AndrejIring opened on Jun 12, 2025

BUG: PerformanceWarning when agg with pd.NamedAgg and as_index=False

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

Bug

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

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

Status: Open.

#61628 In pandas-dev/pandas;

· xma08 opened on Jun 10, 2025

BUG: the behavior of DataFrameGroupBy.apply(..., include_groups=True) breaks post-mortem debugging

Bug

Groupby

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

Status: Open.

#61627 In pandas-dev/pandas;

· pulkin opened on Jun 10, 2025

BUG: Fix infer_dtype result for float with embedded pd.NA

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

Status: Open (in progress).

pandas-dev/pandasnumber 61624

#61624 In pandas-dev/pandas;

· heoh opened on Jun 10, 2025

BUG: CoW - eq not implemented for <class 'pandas.core.internals.blocks.ExtensionBlock'>

Bug

Copy / view semantics

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

Status: Open.

#61622 In pandas-dev/pandas;

· mhabets opened on Jun 10, 2025

BUG: infer_dtype result for float with embedded pd.NA

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

Status: Open.

#61621 In pandas-dev/pandas;

· MarkusZimmerDLR opened on Jun 10, 2025

BUG: numpy_nullable NaNs do not round-trip through CSV

Bug

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

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: Open.

#61617 In pandas-dev/pandas;

· jbrockmendel opened on Jun 9, 2025

BUG: Writing UUIDs fail

Bug

IO Parquetparquet, featherparquet, feather

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

Status: Open.

#61602 In pandas-dev/pandas;

· torchss opened on Jun 7, 2025

BUG: Require sample weights to sum to less than 1 when replace = True

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

Bug

Status: Open (in progress).

pandas-dev/pandasnumber 61582

#61582 In pandas-dev/pandas;

· microslaw opened on Jun 6, 2025

BUG: pd.DataFrame.mul has not support fill_value?

Bug

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

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

Status: Open.

#61581 In pandas-dev/pandas;

· TungPhaSanh opened on Jun 6, 2025