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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: 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

DEPR: SparseDtype

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

SparseSparse Data TypeSparse Data Type

Status: Open.

#56518 In pandas-dev/pandas;

· jbrockmendel opened on Dec 15, 2023

DEPR: read_csv keywords: keep_date_col, delim_whitespace

API Design

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

IO CSVread_csv, to_csvread_csv, to_csv

Status: Open.

#55569 In pandas-dev/pandas;

· jbrockmendel opened on Oct 18, 2023

DEPR: pd.Categorical

CategoricalCategorical Data TypeCategorical Data Type

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#55550 In pandas-dev/pandas;

· jbrockmendel opened on Oct 16, 2023

API/DEPR: infer_freq/inferred_freq return an offset object

API Design

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

FrequencyDateOffsetsDateOffsets

Status: Open.

#55504 In pandas-dev/pandas;

· jbrockmendel opened on Oct 13, 2023

DEPR: DatetimeIndex/TimedeltaIndex constructor keywords

API Design

DatetimeDatetime data dtypeDatetime data dtype

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Open.

#55499 In pandas-dev/pandas;

· jbrockmendel opened on Oct 12, 2023

DEPR: Index.where and Index.putmask

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.

#55174 In pandas-dev/pandas;

· jbrockmendel opened on Sep 16, 2023

BUG: Inconsistent Series constructor behavior ndarray-vs-DTA

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Open.

#55140 In pandas-dev/pandas;

· jbrockmendel opened on Sep 14, 2023