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BUG: user defined function does not work with <code>DataFrame.apply</code>

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

Bug

MultiIndex

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

Status: Open.

#59908 In pandas-dev/pandas;

· shobsi opened on Sep 27, 2024

BUG: select_dtypes does not work with timestamp[ns][pyarrow]

Arrowpyarrow functionalitypyarrow functionality

Bug

Status: Open.

#59888 In pandas-dev/pandas;

· dbalabka opened on Sep 25, 2024

BUG: drop_duplicates() inconsistent output when using/not using subset and having different types of NaNs

Bug

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

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

Status: Open.

#59887 In pandas-dev/pandas;

· user-jx opened on Sep 25, 2024

BUG: Arrow Binary View Types Don't Print When containing missing values

Arrowpyarrow functionalitypyarrow functionality

Bug

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

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

Status: Open.

#59883 In pandas-dev/pandas;

· WillAyd opened on Sep 24, 2024

BUG: When using to_excel() columns with Date Format are converting in Excel to 'General Format.

Bug

IO Excelread_excel, to_excelread_excel, to_excel

Needs InfoClarification about behavior needed to assess issueClarification about behavior needed to assess issue

Status: Open.

#59882 In pandas-dev/pandas;

· ArunPesari2 opened on Sep 24, 2024

BUG: Automatic change of color when the plot type is "line" but not when it is "scatter"

Bug

Visualizationplottingplotting

Status: Open.

#59846 In pandas-dev/pandas;

· TinoDerb opened on Sep 20, 2024

BUG: pd.options.future.no_silent_downcasting is not backward compatible

Bug

Needs InfoClarification about behavior needed to assess issueClarification about behavior needed to assess issue

PDEP6-relatedrelated to PDEP6 (not upcasting during setitem-like Series operations)related to PDEP6 (not upcasting during setitem-like Series operations)

Status: Open.

#59845 In pandas-dev/pandas;

· vityas opened on Sep 20, 2024

BUG: to_sql with ADBC driver fails when schema exists without tables

Bug

IO SQLto_sql, read_sql, read_sql_queryto_sql, read_sql, read_sql_query

Status: Open.

#59841 In pandas-dev/pandas;

· WillAyd opened on Sep 19, 2024

BUG: is_unique fails when using float128 indexes, since pandas 2.0

Bug

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

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

Status: Open.

#59826 In pandas-dev/pandas;

· morotti opened on Sep 17, 2024

BUG: Empty column name in group dataframe when using pyarrow types

Bug

Resampleresample methodresample method

Status: Open.

#59823 In pandas-dev/pandas;

· dbalabka opened on Sep 16, 2024

BUG: pd.concat() cannot concatenate more than 3 mixed-frequency dataframes with multi-index series

Bug

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

PeriodPeriod data typePeriod data type

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

Status: Open.

#59775 In pandas-dev/pandas;

· sakaiando opened on Sep 11, 2024

BUG: tz-aware series with NaT raises exception on .to_numpy("datetime64")

Bug

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#59772 In pandas-dev/pandas;

· Ranfir opened on Sep 10, 2024