List view

Failure in groupby-apply if aggregating timedelta and datetime columns

good first issue

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

Status: Closed (completed).

#15562 In pandas-dev/pandas;

· by field-cady was closed on Oct 19, 2019

feature wanted: pd.DataFrame.info() should show line numbers

Enhancement

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

good first issue

Status: Closed (completed).

#17304 In pandas-dev/pandas;

· by victor-luu191 was closed on Jan 3, 2020

pd.Series.diff() on boolean values

API Design

Status: Closed (completed).

#17294 In pandas-dev/pandas;

· by mrtarsa was closed on Oct 1, 2019

AttributeError: 'IntBlock'/'FloatBlock'/etc. object has no attribute 'sp_index'

good first issue

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

Status: Closed (completed).

#17198 In pandas-dev/pandas;

· by Bthompso8784 was closed on Dec 12, 2019

API: Use object dtype for empty Series

API Design

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Closed (completed).

#17261 In pandas-dev/pandas;

· by TomAugspurger was closed on Dec 5, 2019

RLS: 1.0

Release

Status: Closed (completed).

#17287 In pandas-dev/pandas;

· by TomAugspurger was closed on Dec 30, 2019

rolling( window='10D') does not work for df with MultiIndex

API Design

Groupby

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

Status: Closed (completed).

#15584 In pandas-dev/pandas;

· by fjanoos was closed on Oct 22, 2019

API/DEPR: deprecate SparseSeries.from_coo and accept in constructor

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

SparseSparse Data TypeSparse Data Type

Status: Closed (completed).

#15634 In pandas-dev/pandas;

· by jreback was closed on Sep 18, 2019

BUG: Series.cumin/cummax fails with datetime64[ns, tz] dtype

Bug

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

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#15553 In pandas-dev/pandas;

· by jreback was closed on Dec 25, 2019

DOC: more modern sphinx theme

Docs

Status: Closed (completed).

#15556 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Oct 13, 2019

COMPAT: .unique() should be type preserving

good first issue

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

Status: Closed (completed).

#15442 In pandas-dev/pandas;

· by jreback was closed on Nov 14, 2019

MultiIndex.from_product throws on read-only array

good first issue

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

Status: Closed (completed).

#15286 In pandas-dev/pandas;

· by RhysU was closed on Dec 12, 2019

ENH: Changing Series and DataFrame <code>repr</code> for NaN values

Enhancement

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

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

Status: Closed (completed).

#15375 In pandas-dev/pandas;

· by wesm was closed on Dec 30, 2019

DataFrame.replace() overwrites when values are non-numeric

good first issue

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

Status: Closed (completed).

#16051 In pandas-dev/pandas;

· by cx0 was closed on Nov 4, 2019

read_excel does not work on excel file binary text or buffered binary text object

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

IO Excelread_excel, to_excelread_excel, to_excel

Status: Closed (completed).

#15914 In pandas-dev/pandas;

· by alexanderwhatley was closed on Jan 3, 2020

DEPR: pandas.core, pandas.util.testing

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

Status: Closed (completed).

#16232 In pandas-dev/pandas;

· by jreback was closed on Jan 3, 2020

BUG: After reindex(), astype() raises exception for categorical series

good first issue

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

Status: Closed (completed).

#17444 In pandas-dev/pandas;

· by junjiecai was closed on Nov 2, 2019

DataFrame.any(axis={0, 1}) returns inconsistent values for non-zero timedelta

good first issue

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

Status: Closed (completed).

#17667 In pandas-dev/pandas;

· by nmusolino was closed on Oct 13, 2019

DataFrame.from_dict unexpectedly "flatten" tuples in the dictionary keys

good first issue

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

Status: Closed (completed).

#16769 In pandas-dev/pandas;

· by tkf was closed on Nov 9, 2019

API: .argmax should be positional, not an alias for idxmax

API Design

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

Status: Closed (completed).

#16830 In pandas-dev/pandas;

· by TomAugspurger was closed on Dec 11, 2019

BUG: DataFrame.where with category dtype

CategoricalCategorical Data TypeCategorical Data Type

good first issue

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

Status: Closed (completed).

#16979 In pandas-dev/pandas;

· by rhaps0dy was closed on Nov 12, 2019

CLN: generate groupby method wrapper code

Clean

Groupby

Status: Closed (completed).

#16959 In pandas-dev/pandas;

· by jbrockmendel was closed on Oct 1, 2019

DataFrame aggregation methods inconsistent when object columns have missing values

good first issue

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

Status: Closed (completed).

#16832 In pandas-dev/pandas;

· by tdpetrou was closed on Nov 2, 2019

BUG: merging with non-stringlike columns can raise

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

good first issue

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

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

Status: Closed (completed).

#17962 In pandas-dev/pandas;

· by jreback was closed on Nov 3, 2019

Can't .loc[label] on a CategoricalIndex with labels being integer

CategoricalCategorical Data TypeCategorical Data Type

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

Status: Closed (completed).

#17569 In pandas-dev/pandas;

· by aavanian was closed on Dec 11, 2019