Search results

BUG: <code>rank</code> gives incorrect outputs on Windows with PyArrow backend

Bug

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

Upstream issueIssue related to pandas dependencyIssue related to pandas dependency

Status: Open.

#61896 In pandas-dev/pandas;

· MarcoGorelli opened on Jul 18, 2025

BUG: fix padding for string categories in CategoricalIndex repr

Bug

Output-Formatting__repr__ of pandas objects, to_string__repr__ of pandas objects, to_string

Status: Open (in progress).

pandas-dev/pandasnumber 61894

#61894 In pandas-dev/pandas;

· jorisvandenbossche opened on Jul 17, 2025

BUG: make to_json with JSON Table Schema work correctly with string dtype

Bug

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

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

Status: Open.

#61889 In pandas-dev/pandas;

· jorisvandenbossche opened on Jul 17, 2025

· 

3.0

BUG:float_precision type hints differ in release version from github and docs pandas==2.3.1

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.

#61873 In pandas-dev/pandas;

· mas-4 opened on Jul 16, 2025

BUG: Operations not implemented for non-1D ExtensionArrays

Bug

NA - MaskedArraysRelated to pd.NA and nullable extension arraysRelated to pd.NA and nullable extension arrays

Numeric OperationsArithmetic, Comparison, and Logical operationsArithmetic, Comparison, and Logical operations

Status: Open.

#61866 In pandas-dev/pandas;

· eicchen opened on Jul 15, 2025

BUG: describe(include=..) fails with unrelated error if provided data types are not present

Bug

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

Status: Open.

#61863 In pandas-dev/pandas;

· jorisvandenbossche opened on Jul 15, 2025

BUG: DateOffset default temporal pattern does not work as expected with DST

Bug

FrequencyDateOffsetsDateOffsets

Status: Open.

#61862 In pandas-dev/pandas;

· ValentinBilla opened on Jul 15, 2025

BUG: .rolling().mean() returns all NaNs on re-execution, despite .copy() use

Bug

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

MultiIndex

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Open.

#61841 In pandas-dev/pandas;

· DavidZatica opened on Jul 12, 2025

BUG: read_csv() on_bad_lines callable does not raise ParserWarning when index_col is set

Bug

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Open.

#61837 In pandas-dev/pandas;

· matthewgottlieb opened on Jul 12, 2025

BUG: Series created from pre-2.1 legacy pickles lose their names during .copy operations

Bug

IO Pickleread_pickle, to_pickleread_pickle, to_pickle

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

Status: Open.

#61819 In pandas-dev/pandas;

· Liam3851 opened on Jul 9, 2025

BUG: Dataframe.aggregate drops pyarrow backend for lambda aggregation functions

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Open.

#61812 In pandas-dev/pandas;

· flori-ko opened on Jul 8, 2025

BUG: Pandas Series with Xarray slow print time.

Bug

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

Output-Formatting__repr__ of pandas objects, to_string__repr__ of pandas objects, to_string

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#61809 In pandas-dev/pandas;

· chaoyupeng opened on Jul 8, 2025