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ENH: name(s) argument for reset_index?

Enhancement

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

Status: Closed (completed).

#6878 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Mar 29, 2022

BUG: options.column_space doesn't behave at expected

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#7576 In pandas-dev/pandas;

· by clham was closed on Jun 10, 2022

BUG: groupby.first/last with nans

Bug

Groupby

Status: Closed (completed).

#8427 In pandas-dev/pandas;

· by jreback was closed on Mar 10, 2022

API: read_csv,from_csv/to_csv keyword consistency

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

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#9568 In pandas-dev/pandas;

· by rmorgans was closed on Jan 30, 2022

Can't slice float indices, but can slice integer indices?

Bug

Docs

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

Status: Closed (completed).

#7501 In pandas-dev/pandas;

· by mrjbq7 was closed on Jan 16, 2022

API/ENH: from_dummies

CategoricalCategorical Data TypeCategorical Data Type

Enhancement

Status: Closed (completed).

#8745 In pandas-dev/pandas;

· by jreback was closed on Aug 15, 2022

BUG: DataFrame quantile with only datetime dtypes should provide better error message

Bug

quantilequantile methodquantile method

Status: Closed (completed).

#7308 In pandas-dev/pandas;

· by TomAugspurger was closed on Mar 18, 2022

BUG? DataFrame.groupby.apply result has unexpected index

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

Bug

Groupby

Status: Closed (completed).

#9704 In pandas-dev/pandas;

· by shoyer was closed on Mar 30, 2022

API: inconsistent return format of groupby apply

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

Bug

Groupby

Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issues

Status: Closed (completed).

#13056 In pandas-dev/pandas;

· by edfall was closed on Mar 30, 2022

Series.loc/iloc[x, y] does not raise exception

Bug

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

Status: Closed (completed).

#13831 In pandas-dev/pandas;

· by pkch was closed on Jan 30, 2022

startswith function gives misleading results when passed a series

Bug

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

Status: Closed (completed).

#3485 In pandas-dev/pandas;

· by darindillon was closed on Feb 14, 2022

DEPR: mad (mean absolute difference) functions

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#11787 In pandas-dev/pandas;

· by aechase was closed on Apr 9, 2022

PERF: groupby-diff

Groupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#16706 In pandas-dev/pandas;

· by jreback was closed on Feb 28, 2022

DataFrame.groupby.apply returns different results with copy lambda functions.

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

Bug

Groupby

Status: Closed (completed).

#14927 In pandas-dev/pandas;

· by mroeschke was closed on Mar 30, 2022

Rolling window with step size

Enhancement

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

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#15354 In pandas-dev/pandas;

· by alexlouden was closed on Feb 28, 2022

Series.asof not preserving dtype

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Closed (completed).

#16063 In pandas-dev/pandas;

· by fabrice-deschatres was closed on Jan 16, 2022

Logical operations on np.bool_ using pandas.eval raises TypeError

expressionspd.eval, querypd.eval, query

good first issue

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

Status: Closed (completed).

#25823 In pandas-dev/pandas;

· by james-mchugh was closed on Jun 5, 2022

Inconsistent handling of duplicate axes + mixed dtypes in <code>DataFrame.where</code>

good first issue

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

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

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

Status: Closed (completed).

#25399 In pandas-dev/pandas;

· by batterseapower was closed on Feb 26, 2022

groupby/apply behaves different if a column is timezone-aware or not

good first issue

Groupby

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

Status: Closed (completed).

#27212 In pandas-dev/pandas;

· by jordansamuels was closed on Mar 30, 2022

Adhere to the standard for dropping Python versions

DependenciesRequired and optional dependenciesRequired and optional dependencies

Docs

good first issue

Status: Closed (completed).

#27557 In pandas-dev/pandas;

· by datapythonista was closed on Apr 28, 2022

BUG: Groupby.transform('size') fails for multicolumn frame

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

Bug

Groupby

Status: Closed (completed).

#27469 In pandas-dev/pandas;

· by ghost was closed on Jan 30, 2022

Column dtype change on write of improper value

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

Status: Closed (completed).

#26049 In pandas-dev/pandas;

· by jp68138743541 was closed on Jan 10, 2022

BUG: Passing <code>level=</code> to <code>DataFrame.reindex</code> fails when the index is flat

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

Bug

MultiIndex

Status: Closed (completed).

#35132 In pandas-dev/pandas;

· by zhenruiliao was closed on Mar 11, 2022

BUG: pd.to_datetime() raises InvalidIndexError with Null-like arguments

DatetimeDatetime data dtypeDatetime data dtype

good first issue

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

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

Status: Closed (completed).

#35888 In pandas-dev/pandas;

· by blinkseb was closed on Feb 1, 2022

BUG: Pandas 1.0.5 → 1.1.0 behavior change on DataFrame.apply() where fn returns np.ndarray

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

Compatpandas objects compatability with Numpy or Python functionspandas objects compatability with Numpy or Python functions

good first issue

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

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

Status: Closed (completed).

#35517 In pandas-dev/pandas;

· by dechamps was closed on Mar 7, 2022