List view

DEPR: Certain Grouper and Grouping attributes

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Groupby

RefactorInternal refactoring of codeInternal refactoring of code

Status: Closed (completed).

#56148 In pandas-dev/pandas;

· by rhshadrach was closed on Nov 26, 2023

DEPR: Series.view

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Closed (completed).

#20251 In pandas-dev/pandas;

· by jreback was closed on Nov 27, 2023

Groupby doesn't call aggregation on empty groups

Bug

CategoricalCategorical Data TypeCategorical Data Type

good first issue

Groupby

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

Status: Closed (completed).

#18869 In pandas-dev/pandas;

· by TomAugspurger was closed on Dec 27, 2023

BUG: prod and groupby.prod behave differently

Bug

good first issue

Groupby

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

Reduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.

Status: Closed (completed).

#46573 In pandas-dev/pandas;

· by tf401 was closed on Dec 9, 2023

BUG: Inconsistency with grouping columns in agg

Bug

good first issue

Groupby

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

Status: Closed (completed).

#50383 In pandas-dev/pandas;

· by rhshadrach was closed on Sep 19, 2023

REF: BinGrouper indices

Groupby

RefactorInternal refactoring of codeInternal refactoring of code

Status: Closed (completed).

#52468 In pandas-dev/pandas;

· by rhshadrach was closed on Aug 19, 2023

DEPR/BUG: DataFrame.stack including all null rows when stacking multiple levels

Bug

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#53515 In pandas-dev/pandas;

· by rhshadrach was closed on Oct 17, 2023

DEPR: pct_change method/limit keyword

BlockerBlocking issue or pull request for an upcoming releaseBlocking issue or pull request for an upcoming release

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Status: Closed (completed).

#53491 In pandas-dev/pandas;

· by jbrockmendel was closed on Jan 4, 2024

BUG: Grouped rank incorrect behaviour with nullable types

Bug

good first issue

Groupby

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

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Status: Closed (completed).

#54206 In pandas-dev/pandas;

· by NMAC427 was closed on Sep 22, 2023

BUG: pd.read_excel with engine "xlrd" fails when a cell contains NaN/inf

Bug

IO Excelread_excel, to_excelread_excel, to_excel

IO SQLto_sql, read_sql, read_sql_queryto_sql, read_sql, read_sql_query

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

Status: Closed (completed).

#54564 In pandas-dev/pandas;

· by burnpanck was closed on Aug 21, 2023

DEPR: observed=False default for DataFrame.pivot_table

CategoricalCategorical Data TypeCategorical Data Type

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#56236 In pandas-dev/pandas;

· by rhshadrach was closed on Dec 4, 2023

BUG: new string dtype fails with >2 GB of data in a single column

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Closed (completed).

#56259 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Dec 21, 2023

BUG: assert_series_equal not raising on unequal series?

Blocker for rcBlocking issue or pull request for release candidateBlocking issue or pull request for release candidate

Bug

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

Status: Closed (completed).

#55882 In pandas-dev/pandas;

· by MarcoGorelli was closed on Nov 27, 2023

BUG: future_stack changes incorrectly pd.NA in index to np.nan

Bug

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

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

Status: Closed (completed).

#56573 In pandas-dev/pandas;

· by torchbear was closed on Dec 21, 2023

BUG: TypeError when using convert_dtypes() and pyarrow engine

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Closed (completed).

#56581 In pandas-dev/pandas;

· by dxdc was closed on Dec 21, 2023

DOC: "Copy On Write: Patterns to avoid" confusion

Copy / view semantics

Docs

Status: Closed (completed).

#56622 In pandas-dev/pandas;

· by avm19 was closed on Dec 27, 2023

BUG: <code>pd.testing.assert_series_equal</code> break in version 2.2.0rc0

BlockerBlocking issue or pull request for an upcoming releaseBlocking issue or pull request for an upcoming release

Bug

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).

#56646 In pandas-dev/pandas;

· by shobsi was closed on Jan 8, 2024

BUG: testing assert break in version 2.2.0rc0

Bug

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

Status: Closed (completed).

#56651 In pandas-dev/pandas;

· by shobsi was closed on Dec 28, 2023

BUG: <code>ArrowInvalid</code> dividing large <code>int64[pyarrow]</code>

Arrowpyarrow functionalitypyarrow functionality

Bug

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

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

Status: Closed (completed).

#56645 In pandas-dev/pandas;

· by mattharrison was closed on Dec 28, 2023

REGR: assert_frame_equal check_dtype=False no longer works for equal values but numpy vs extension dtype

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).

#56340 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Dec 28, 2023

Restructure offset deprecation whatsnew

Docs

Status: Closed (completed).

#56299 In pandas-dev/pandas;

· by phofl was closed on Dec 6, 2023

BUG: __eq__ raises NotImplementedError for new arrow string dtype

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Closed (completed).

#56008 In pandas-dev/pandas;

· by phofl was closed on Dec 21, 2023

ENH: add limit_area argument to ffill() method as interpolate( method='ffill', limit_area='inside') as been deprecated

Enhancement

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

Status: Closed (completed).

#56492 In pandas-dev/pandas;

· by j-carson was closed on Dec 19, 2023

REGR: DatetimeTZDtype.__from_arrow__ interprets UTC values as local wall time

Arrowpyarrow functionalitypyarrow functionality

BlockerBlocking issue or pull request for an upcoming releaseBlocking issue or pull request for an upcoming release

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

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#56775 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jan 19, 2024

BUG: Regression for grouping on Decimal values when upgrading from 1.3 to 2.0.3

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

Bug

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

Status: Closed (completed).

#54847 In pandas-dev/pandas;

· by stevenlandis-rl was closed on Dec 17, 2023