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DOC: More subtotals / margins in pivot_table

Docs

good first issue

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

Status: Closed (completed).

#4817 In pandas-dev/pandas;

· by hayd was closed on Aug 12, 2021

index_col and usecols do not work reliably together in read_csv

Bug

IO CSVread_csv, to_csvread_csv, to_csv

Status: Closed (completed).

#9098 In pandas-dev/pandas;

· by awhan was closed on Dec 18, 2021

CSV parse_dates not working if multiline header is specified.

Bug

IO CSVread_csv, to_csvread_csv, to_csv

MultiIndex

Status: Closed (completed).

#8991 In pandas-dev/pandas;

· by roldugin was closed on Nov 14, 2021

Implement high performance rolling_rank

PerformanceMemory or execution speed performanceMemory or execution speed performance

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#9481 In pandas-dev/pandas;

· by PH82 was closed on Sep 14, 2021

API: Index should support __inverse__ ops

Enhancement

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

Status: Closed (completed).

#8875 In pandas-dev/pandas;

· by sinhrks was closed on Dec 23, 2021

index_col in read_csv and read_table ignores dtype argument

Bug

IO CSVread_csv, to_csvread_csv, to_csv

Status: Closed (completed).

#9435 In pandas-dev/pandas;

· by makmanalp was closed on Nov 28, 2021

support Ellipsis (...) in pandas indexing

Enhancement

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

Status: Closed (completed).

#10956 In pandas-dev/pandas;

· by shoyer was closed on Oct 16, 2021

Unable to read MultiIndex columns from CSV if empty levels

Bug

IO CSVread_csv, to_csvread_csv, to_csv

MultiIndex

Status: Closed (completed).

#13054 In pandas-dev/pandas;

· by jluttine was closed on Dec 19, 2021

ENH: EWM Sum?

Enhancement

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#13297 In pandas-dev/pandas;

· by max-sixty was closed on Oct 6, 2021

BUG: in read_csv, keep_date_cols doesn't result in correct dtype

Bug

IO CSVread_csv, to_csvread_csv, to_csv

Status: Closed (completed).

#13378 In pandas-dev/pandas;

· by Thomasillo was closed on Nov 28, 2021

Add decimal option to read_excel

Enhancement

IO Excelread_excel, to_excelread_excel, to_excel

Status: Closed (completed).

#14403 In pandas-dev/pandas;

· by bbirand was closed on Nov 5, 2021

Row based style.apply doesn't modify background colors

Docs

Stylerconditional formatting using DataFrame.styleconditional formatting using DataFrame.style

Status: Closed (completed).

#13657 In pandas-dev/pandas;

· by shri was closed on Aug 19, 2021

read_fwf does not use comment character if colspecs argument does not include first column

good first issue

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#14135 In pandas-dev/pandas;

· by nograpes was closed on Nov 1, 2021

Add ability to process bad lines for read_csv

Enhancement

IO CSVread_csv, to_csvread_csv, to_csv

Status: Closed (completed).

#5686 In pandas-dev/pandas;

· by tbicr was closed on Jan 8, 2022

DataFrame.rename renames wrong elements

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

rename.rename, .rename_axis.rename, .rename_axis

Status: Closed (completed).

#4980 In pandas-dev/pandas;

· by fonnesbeck was closed on Nov 15, 2021

API: add Series.info method

Enhancement

Status: Closed (completed).

#5167 In pandas-dev/pandas;

· by jreback was closed on Dec 1, 2021

read_csv: Inconsistent behaviour with parse_dates if the first row is short

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

IO CSVread_csv, to_csvread_csv, to_csv

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

Status: Closed (completed).

#11019 In pandas-dev/pandas;

· by jmopp was closed on Nov 26, 2021

BUG: setitem with at not inferring dtype correctly

Bug

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

Status: Closed (completed).

#6942 In pandas-dev/pandas;

· by jreback was closed on Jan 3, 2022

read_fwf() doesn't work properly when both skiprows and iterator options are used.

Enhancement

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

IO CSVread_csv, to_csvread_csv, to_csv

Status: Closed (completed).

#10261 In pandas-dev/pandas;

· by arenius was closed on Nov 26, 2021

CustomBusinessMonthBegin offset parameter

good first issue

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

Status: Closed (completed).

#14869 In pandas-dev/pandas;

· by LingnanLemon was closed on Oct 31, 2021

Series values cannot be accessed by numeric categorical index

Bug

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).

#14865 In pandas-dev/pandas;

· by alex-filatov was closed on Dec 23, 2021

BUG: groupby.rank with non-unique index groupers

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

good first issue

Groupby

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

Status: Closed (completed).

#16577 In pandas-dev/pandas;

· by jreback was closed on Nov 1, 2021

Index with dtype int32

32bit32-bit systems32-bit systems

Enhancement

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#16404 In pandas-dev/pandas;

· by Stanpol was closed on Aug 5, 2021

Pandas different between Python 2.7 and Python 3.5

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

Status: Closed (completed).

#16380 In pandas-dev/pandas;

· by marabout2015 was closed on Nov 1, 2021

df.stack() still misbehaving in unsorted case

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).

#16925 In pandas-dev/pandas;

· by dsm054 was closed on Nov 1, 2021