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DEPR: Series.combine with non-Series

combine/combine_first/updateNDFrame.combine, combine_first, updateNDFrame.combine, combine_first, update

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#62918 In pandas-dev/pandas;

· jbrockmendel opened on Oct 30, 2025

DEPR: columns keyword in Series.drop

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open (in progress).

pandas-dev/pandasnumber 62685

#62685 In pandas-dev/pandas;

· jbrockmendel opened on Oct 13, 2025

DEPR: implicit resample in plotting

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Stale

Visualizationplottingplotting

Status: Open (in progress).

pandas-dev/pandasnumber 62433

#62433 In pandas-dev/pandas;

· jbrockmendel opened on Sep 24, 2025

DEPR: rename 'unit' keyword in to_datetime etc

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Open.

#62097 In pandas-dev/pandas;

· jbrockmendel opened on Aug 12, 2025

DEPR: convert_dtypes keywords

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

Status: Open.

#62022 In pandas-dev/pandas;

· jbrockmendel opened on Aug 2, 2025

DEPR: PeriodDtype.freq

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

PeriodPeriod data typePeriod data type

Stale

Status: Open (in progress).

pandas-dev/pandasnumber 61897

#61897 In pandas-dev/pandas;

· jbrockmendel opened on Jul 18, 2025

BUG: join unexpectedly created extra column start with "key_"

Bug

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61294 In pandas-dev/pandas;

· albb318 opened on Apr 15, 2025

DEPR: Make <code>dtype="category"</code> always imply ordered=False

CategoricalCategorical Data TypeCategorical Data Type

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#61074 In pandas-dev/pandas;

· mroeschke opened on Mar 7, 2025

BUG: df.astype converts to datetime64[ns] inconsistently with respect to dayfirst

Bug

DatetimeDatetime data dtypeDatetime data dtype

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#60964 In pandas-dev/pandas;

· cgflex opened on Feb 19, 2025

API: <code>future.default_arg</code> for method-specific behavior changes

API Design

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Open.

#60593 In pandas-dev/pandas;

· rhshadrach opened on Dec 20, 2024

DEPR: <code>keep_default_dates</code> and <code>convert_dates</code> in <code>read_json</code>

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

Status: Open.

#59161 In pandas-dev/pandas;

· mroeschke opened on Jul 1, 2024

BUG: from_dict() hidden (correct) behavior not aligned with documentation and typing: accepts and processes lists of dicts

Bug

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Open.

#58862 In pandas-dev/pandas;

· pmaier-bhs opened on May 29, 2024