List view

REGR: fillna not filling NaNs after pivot without explicitly listing pivot values

InternalsRelated to non-user accessible pandas implementationRelated to non-user accessible pandas implementation

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

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

Status: Closed (completed).

#36495 In pandas-dev/pandas;

· by miles82 was closed on Nov 26, 2020

REGR: Series.__repr__ is broken for SparseDtype("datetime64[ns]")

DatetimeDatetime data dtypeDatetime data dtype

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

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

SparseSparse Data TypeSparse Data Type

Status: Closed (completed).

#35843 In pandas-dev/pandas;

· by dsaxton was closed on Dec 7, 2020

BUG: freq set to NONE when resampling pd.Multiindex (introduced in v1.1.0)

FrequencyDateOffsetsDateOffsets

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

MultiIndex

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

Status: Closed (completed).

#35563 In pandas-dev/pandas;

· by andreas-vester was closed on Nov 30, 2020

AssertionError in multidimensional indexing of a 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).

#35527 In pandas-dev/pandas;

· by TomAugspurger was closed on Dec 1, 2020

REGR: unstack on 'int' dtype prevent fillna to work

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

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

Status: Closed (completed).

#37115 In pandas-dev/pandas;

· by ant1j was closed on Dec 2, 2020

REGR: Row series are broken after applying to_datetime()

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).

#36785 In pandas-dev/pandas;

· by krassowski was closed on Dec 4, 2020

BUG: pytables index expressions fail in Python 3.9

Bug

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

IO HDF5read_hdf, HDFStoreread_hdf, HDFStore

Status: Closed (completed).

#37217 In pandas-dev/pandas;

· by rebecca-palmer was closed on Nov 28, 2020

REGR: Column with datetime values too big to be converted to pd.Timestamp leads to assertion error in groupby

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).

#36003 In pandas-dev/pandas;

· by Khris777 was closed on Nov 27, 2020

BUG: Intersection of multiindex returns duplicates

MultiIndex

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

Status: Closed (completed).

#36915 In pandas-dev/pandas;

· by egorvavilov was closed on Nov 29, 2020

CI: travis-36-cov builds regularly fails to build with The build has been terminated on 1.1.x

CIContinuous IntegrationContinuous Integration

Status: Closed (completed).

#37309 In pandas-dev/pandas;

· by simonjayhawkins was closed on Nov 26, 2020

BUG: Regression adding Timedelta to DatetimeIndex, get ValueError: Inferred frequency None from passed values does not conform to passed frequency

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).

#37295 In pandas-dev/pandas;

· by nathanielatom was closed on Nov 13, 2020

CI: Move Python 3.9 Build to Conda

CIContinuous IntegrationContinuous Integration

Status: Closed (completed).

#33948 In pandas-dev/pandas;

· by alimcmaster1 was closed on Nov 14, 2020

Remove <code>-Werror</code> from setup.py

BuildLibrary building on various platformsLibrary building on various platforms

CIContinuous IntegrationContinuous Integration

Status: Closed (completed).

#33315 In pandas-dev/pandas;

· by xhochy was closed on Nov 27, 2020

BUG: clang-9: error: -Wl,-export_dynamic: 'linker' input unused (OSX)

Bug

BuildLibrary building on various platformsLibrary building on various platforms

Status: Closed (completed).

#33314 In pandas-dev/pandas;

· by xhochy was closed on Nov 27, 2020

DOC: corrupted function signatures on stable

Docs

Status: Closed (completed).

#37813 In pandas-dev/pandas;

· by ivanovmg was closed on Nov 26, 2020

BUG: Regression in 1.1.0. "invalid slicing for a 1-ndim ExtensionArray"

CategoricalCategorical Data TypeCategorical Data Type

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

Status: Closed (completed).

#37631 In pandas-dev/pandas;

· by buhrmann was closed on Nov 9, 2020

BUG: RollingGroupby duplicates columns in index even with group_keys=False

Bug

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

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#37641 In pandas-dev/pandas;

· by venaturum was closed on Nov 9, 2020

BUG: errors with <code>.loc[(slice(...), ), ]</code> when modifying a subset of rows in a pandas dataframe/series in 1.1.4

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).

#37711 In pandas-dev/pandas;

· by taozuoqiao was closed on Nov 14, 2020

BUG: Series.groupby() fails in pandas 1.1.4 when index has tuple name.

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

SeriesSeries data structureSeries data structure

Status: Closed (completed).

#37755 In pandas-dev/pandas;

· by burk was closed on Nov 14, 2020

BUG: EA inplace add (and other ops) with non-EA arg broken

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

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

Status: Closed (completed).

#37910 In pandas-dev/pandas;

· by marco-neumann-by was closed on Nov 24, 2020

RLS: 1.1.5

Release

Status: Closed (completed).

#38066 In pandas-dev/pandas;

· by simonjayhawkins was closed on Dec 8, 2020

BUG: groupby __iter__ on pandas 1.1.x not propagating _metadata on DataFrame subclasses

Groupby

metadata_metadata, .attrs_metadata, .attrs

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

Status: Closed (completed).

#37343 In pandas-dev/pandas;

· by ryandvmartin was closed on Nov 4, 2020

REGR: Performance regression on RollingGroupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Closed (completed).

#38038 In pandas-dev/pandas;

· by cpmbailey was closed on Dec 1, 2020

BUG: GroupBy.first does not skip missing values in string-valued columns

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).

#38286 In pandas-dev/pandas;

· by amalcgcg was closed on Dec 6, 2020

BUG: Fix duplicates in intersection of multiindexes

MultiIndex

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

Status: Merged (completed).

pandas-dev/pandasnumber 36927

#36927 In pandas-dev/pandas;

· by phofl was closed on Nov 29, 2020