OpenMay 9, 2026
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Potential regression induced by "Refactored pandas_timedelta_to_timedeltastruct"
Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team memberPerformanceMemory or execution speed performanceMemory or execution speed performanceRegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas versionStatus: Open.#57951 In pandas-dev/pandas;BUG / API: setitem on pandas object fails if underlying numpy array is read-only
IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselvesStatus: Open.#62144 In pandas-dev/pandas;TRACKER: new default String dtype (pyarrow-backed, numpy NaN semantics)
Arrowpyarrow functionalitypyarrow functionalityStringsString extension data type and string dataString extension data type and string dataStatus: Open.#54792 In pandas-dev/pandas;Copy-on-Write (PDEP-7) follow-up overview issue
Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issuesStatus: Open.#48998 In pandas-dev/pandas;BUG: Behavior change in pandas 3.x with
Series.resampleandclosed="right", how="right"RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas versionResampleresample methodresample methodStatus: Open.#62200 In pandas-dev/pandas;PDEP-8 inplace keyword deprecation - implementation tracker issue
inplaceRelating to inplace parameter or equivalentRelating to inplace parameter or equivalentMaster TrackerHigh level tracker for similar issuesHigh level tracker for similar issuesStatus: Open.#63207 In pandas-dev/pandas;DEP: Drop NumPy 1.26 support
DependenciesRequired and optional dependenciesRequired and optional dependenciesStatus: Open.#63403 In pandas-dev/pandas;BUG: for ordered categorical data implements correct computation of kendall/spearman correlations
CategoricalCategorical Data TypeCategorical Data TypeStatus: Open (in progress).pandas-dev/pandasnumber 62880#62880 In pandas-dev/pandas;API: implement Period(|Dtype|Array|Index).unit, remove ._freqstr
PeriodPeriod data typePeriod data typeStatus: Open (in progress).pandas-dev/pandasnumber 64155#64155 In pandas-dev/pandas;BUG:
Indexaccepts lists as valuesConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array ConstructorsIndexRelated to the Index class or subclassesRelated to the Index class or subclassesStatus: Open.#61937 In pandas-dev/pandas;CI: Clean misc workflows and files
BuildLibrary building on various platformsLibrary building on various platformsCIContinuous IntegrationContinuous IntegrationStatus: Open (in progress).pandas-dev/pandasnumber 65455#65455 In pandas-dev/pandas;DEPR: deprecate inplace keyword in the rename() method
DeprecateFunctionality to remove in pandasFunctionality to remove in pandasinplaceRelating to inplace parameter or equivalentRelating to inplace parameter or equivalentStatus: Open (in progress).pandas-dev/pandasnumber 65466#65466 In pandas-dev/pandas;ENH: add sort() method to StringArray and ArrowStringArray
ExtensionArrayExtending pandas with custom dtypes or arrays.Extending pandas with custom dtypes or arrays.Sortinge.g. sort_index, sort_valuese.g. sort_index, sort_valuesStatus: Open (in progress).pandas-dev/pandasnumber 65052#65052 In pandas-dev/pandas;BUG: pandas.DataFrame.max fails on datetime64[ns, ...] columns with different time zones and NaT in the data
DatetimeDatetime data dtypeDatetime data dtypeMissing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolateReduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.Status: Open.#65500 In pandas-dev/pandas;- Status: Open (in progress).pandas-dev/pandasnumber 65513#65513 In pandas-dev/pandas;