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BUG: avoid validation error for ufunc with string[python] array

Bug

StringsString extension data type and string data String extension data type and string data

Status: Open (in progress).

pandas-dev/pandasnumber 62498

#62498 In pandas-dev/pandas;

· jorisvandenbossche opened on Sep 29, 2025

·

2.3.3

CLN: Enforce deprecation of not validating na argument to string methods

Clean

Error ReportingIncorrect or improved errors from pandas Incorrect or improved errors from pandas

StringsString extension data type and string data String extension data type and string data

Status: Open (in progress).

pandas-dev/pandasnumber 62399

#62399 In pandas-dev/pandas;

· rhshadrach opened on Sep 21, 2025

BUG: str.match and str.contains behave inconsistently on compiled regexps (regression in 2.3.2 relative to 2.3.1)

API - ConsistencyInternal Consistency of API/Behavior Internal Consistency of API/Behavior

Bug

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

StringsString extension data type and string data String extension data type and string data

Status: Open.

#62240 In pandas-dev/pandas;

· sam-s opened on Sep 2, 2025

·

3.0

REF/API: Move ArrowDtype(pa.foo_string()) into StringDtype(...)

API Design

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

StringsString extension data type and string data String extension data type and string data

Status: Open.

#62129 In pandas-dev/pandas;

· jbrockmendel opened on Aug 16, 2025

BUG: <code>pd.api.types.is_string_dtype()</code> returns inconsistent results for Categorical series vs dtype

Bug

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

StringsString extension data type and string data String extension data type and string data

Status: Open.

#62109 In pandas-dev/pandas;

· nsarang opened on Aug 14, 2025

BUG: raise a proper exception when str.rsplit is passed a regex and clarify the docs

Stale

StringsString extension data type and string data String extension data type and string data

Status: Open (in progress).

pandas-dev/pandasnumber 62035

#62035 In pandas-dev/pandas;

· hamdanal opened on Aug 3, 2025

BUG: <code>metadata</code> on <code>np.ndarray</code> of <code>np.dtype("O")</code> dtype lost when roundtripped through <code>pandas.Series</code>

StringsString extension data type and string data String extension data type and string data

Status: Open.

#61938 In pandas-dev/pandas;

· ilan-gold opened on Jul 24, 2025

String dtype: backwards compatibility of selecting "object" vs "str" columns in <code>select_dtypes</code>

StringsString extension data type and string data String extension data type and string data

Status: Open.

#61916 In pandas-dev/pandas;

· jorisvandenbossche opened on Jul 21, 2025

·

3.0

BUG: Fix Series.str.zfill for ArrowDtype string arrays #61485

Arrowpyarrow functionality pyarrow functionality

StringsString extension data type and string data String extension data type and string data

Status: Open (in progress).

pandas-dev/pandasnumber 61533

#61533 In pandas-dev/pandas;

· iabhi4 opened on Jun 1, 2025

·

3.0

BUG: Passing string[pyarrow] to the dtype parameter of e.g. csv_read() does produce a string type Series

Arrowpyarrow functionality pyarrow functionality

Dtype ConversionsUnexpected or buggy dtype conversions Unexpected or buggy dtype conversions

IO CSVread_csv, to_csv read_csv, to_csv

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

StringsString extension data type and string data String extension data type and string data

Status: Open.

#61496 In pandas-dev/pandas;

· ClauPet opened on May 26, 2025

BUG: zfill with pyarrow string

Arrowpyarrow functionality pyarrow functionality

Bug

StringsString extension data type and string data String extension data type and string data

Status: Open.

#61485 In pandas-dev/pandas;

· williambdean opened on May 23, 2025

BUG: documented usage of of <code>str.split(...).str.get</code> fails on dtype <code>large_string[pyarrow]</code>

Bug

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

StringsString extension data type and string data String extension data type and string data

Status: Open.

#61431 In pandas-dev/pandas;

· SandroCasagrande opened on May 12, 2025