List view

BUG: Pandas 1.4.x - calling groupBy(...).apply(func) on an empty dataframe invokes func

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Bug

Groupby

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#47985 In pandas-dev/pandas;

· by fredspizza was closed on Sep 27, 2022

BUG: generated timestamps deviate from expected values

Bug

ExtensionArrayExtending pandas with custom dtypes or arrays.Extending pandas with custom dtypes or arrays.

Timestamppd.Timestamp and associated methodspd.Timestamp and associated methods

Status: Closed (completed).

#48255 In pandas-dev/pandas;

· by chalmerlowe was closed on Sep 29, 2022

BUG: df.fillna(dict, inplace=True) triggers FutureWarning in 1.5.0rc0 when DataFrame is empty

Copy / view semantics

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

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48480 In pandas-dev/pandas;

· by marekro was closed on Sep 29, 2022

BUG: freq information lost after stack() is called

Bug

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

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#49054 In pandas-dev/pandas;

· by MMCMA was closed on Oct 14, 2022

BUG: pd.fillna(np.nan, inplace=True) replaces values which are not None when using datetime dtype

Bug

DatetimeDatetime data dtypeDatetime data dtype

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

replacereplace methodreplace method

Status: Closed (completed).

#48863 In pandas-dev/pandas;

· by adnapPanda was closed on Sep 29, 2022

BUG: <code>pd.to_datetime()</code> fails to parse nanoseconds

DatetimeDatetime data dtypeDatetime data dtype

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48767 In pandas-dev/pandas;

· by gtopper was closed on Sep 29, 2022

BUG: None value converted to NaN in Series

Bug

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

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48665 In pandas-dev/pandas;

· by stephanecollot was closed on Sep 23, 2022

QST: pd.series indexing True auto 0 change

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

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48653 In pandas-dev/pandas;

· by sc303030 was closed on Sep 26, 2022

REGR: df.apply('any', axis=1) fails with ValueError

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48656 In pandas-dev/pandas;

· by vnlitvinov was closed on Sep 30, 2022

REGR: Setting values with 'loc' and boolean mask mixes up values (all-True mask)

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

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48701 In pandas-dev/pandas;

· by sohailc was closed on Sep 22, 2022

BUG: regression in read_csv reading from file stream with encoding

Bug

IO CSVread_csv, to_csvread_csv, to_csv

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48646 In pandas-dev/pandas;

· by coroa was closed on Sep 20, 2022

BUG: AttributeError: 'function' object has no attribute 'currentframe'

IO SQLto_sql, read_sql, read_sql_queryto_sql, read_sql, read_sql_query

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48733 In pandas-dev/pandas;

· by huka81 was closed on Sep 26, 2022

BUG: <code>df.groupby(axis=1).size()</code> returns weird output

Bug

Groupby

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48738 In pandas-dev/pandas;

· by vnlitvinov was closed on Sep 26, 2022

BUG: pandas 1.5 fails to groupby on (nullable) Int64 column with dropna=False

Bug

Groupby

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

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48794 In pandas-dev/pandas;

· by sm-Fifteen was closed on Oct 4, 2022

BUG: The behavior for <code>DataFrame.corrwith</code> is changed in pandas 1.5.0 ??

AlgosNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diffNon-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48826 In pandas-dev/pandas;

· by itholic was closed on Oct 17, 2022

BUG: to_hdf fails with boolean index in 1.5

Bug

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48667 In pandas-dev/pandas;

· by anthonyaag was closed on Sep 22, 2022

BUG: <code>dropna</code> affects <code>observed</code> in <code>DataFrame.groupby()</code> since v1.5

Bug

CategoricalCategorical Data TypeCategorical Data Type

Groupby

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48645 In pandas-dev/pandas;

· by pwwang was closed on Sep 23, 2022

BUG: DataFrame.plot(kind='scatter') does not raise KeyError when unknown colormap is applied

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Visualizationplottingplotting

Status: Closed (completed).

#48726 In pandas-dev/pandas;

· by lisphilar was closed on Sep 23, 2022

BUG: to_datetime - confusion with timeawarness

DatetimeDatetime data dtypeDatetime data dtype

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48678 In pandas-dev/pandas;

· by PrimozGodec was closed on Sep 30, 2022

BUG: <code>FutureWarning: Inferring datetime64[ns]</code> when using <code>pd.pivot_table(..., margins=True)</code> and <code>datetime64[ns]</code>

Bug

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

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Closed (completed).

#48683 In pandas-dev/pandas;

· by bollard was closed on Sep 23, 2022

BUG: ExcelWriter.book - attribute not accessible for setting

IO Excelread_excel, to_excelread_excel, to_excel

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48780 In pandas-dev/pandas;

· by vranoch was closed on Oct 5, 2022

BUG: Regression on pandas 1.5.0 using describe with Int64 dtype getting a TypeError

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48778 In pandas-dev/pandas;

· by killerrex was closed on Sep 26, 2022

RLS: pandas 1.5.1

Release

Status: Closed (completed).

#48991 In pandas-dev/pandas;

· by datapythonista was closed on Oct 20, 2022

BUG: Regression in assert_frame_equal with check_like=True and Multiindex

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Testingpandas testing functions or related to the test suitepandas testing functions or related to the test suite

Status: Closed (completed).

#48975 In pandas-dev/pandas;

· by boxblox was closed on Oct 7, 2022

BUG: df.to_parquet() fails for a PyFilesystem2 file handle

Bug

IO Parquetparquet, featherparquet, feather

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Closed (completed).

#48944 In pandas-dev/pandas;

· by SamRWest was closed on Oct 12, 2022