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BUG: positional getitem indexing with list on Series with duplicate integer index fails

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

Status: Closed (completed).

#17347 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Apr 16, 2019

BUG: tz-aware datetime with column-wise comparisions failing with np.minmum/maximum

good first issue

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

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

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#15552 In pandas-dev/pandas;

· by adbull was closed on Jul 17, 2019

IndexSlice cannot infer missing values when an Index object is passed in

Bug

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

MultiIndex

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

Status: Closed (completed).

#16712 In pandas-dev/pandas;

· by guocheng was closed on Jun 29, 2019

corrupted data and segfault in groupby cumsum/cumprod/cummin/cummax with absent categories

Bug

LinuxLinux OSLinux OS

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

SegfaultNon-Recoverable ErrorNon-Recoverable Error

Status: Closed (completed).

#16771 In pandas-dev/pandas;

· by adbull was closed on Apr 20, 2019

to_datetime should support ISO week year

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

DatetimeDatetime data dtypeDatetime data dtype

Status: Closed (completed).

#16607 In pandas-dev/pandas;

· by buyology was closed on Mar 18, 2019

BUG: SparseDataFrame constructor issues

Bug

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

SparseSparse Data TypeSparse Data Type

Status: Closed (completed).

#16807 In pandas-dev/pandas;

· by kbattocchi was closed on Mar 3, 2019

ERR: validate partial string indexing with tz-aware end-points

DatetimeDatetime data dtypeDatetime data dtype

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

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).

#16785 In pandas-dev/pandas;

· by 1kastner was closed on Feb 24, 2019

PERF: Unnecessary hash table with RangeIndex

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#16685 In pandas-dev/pandas;

· by chris-b1 was closed on Jun 30, 2019

Confusing (possibly buggy) IntervalIndex behavior

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

IntervalInterval data typeInterval data type

Status: Closed (completed).

#16316 In pandas-dev/pandas;

· by alexlenail was closed on Jul 2, 2019

DEPR: Timedelta with passed unit M, Y

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

TimedeltaTimedelta data typeTimedelta data type

Status: Closed (completed).

#16344 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Feb 8, 2019

DataFrame.eval errors with AttributeError: 'UnaryOp'

Bug

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

Status: Closed (completed).

#16363 In pandas-dev/pandas;

· by brentp was closed on Apr 12, 2019

Make DataFrame.to_html output full content

Enhancement

IO HTMLread_html, to_html, Styler.apply, Styler.applymapread_html, to_html, Styler.apply, Styler.applymap

Status: Closed (completed).

#17004 In pandas-dev/pandas;

· by dclong was closed on Mar 3, 2019

display.precision not honored for column headers

Bug

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

Status: Closed (completed).

#17280 In pandas-dev/pandas;

· by pblelloch was closed on Apr 4, 2019

BUG: df.plot() with FixedOffset timezones

API Design

DatetimeDatetime data dtypeDatetime data dtype

Enhancement

TimezonesTimezone data dtypeTimezone data dtype

Status: Closed (completed).

#17173 In pandas-dev/pandas;

· by deadlybulb was closed on Jul 17, 2019

DataFrame.iloc raises ValueError: buffer source array is read-only when applied to read-only indices

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

Status: Closed (completed).

#17192 In pandas-dev/pandas;

· by lesteve was closed on Jul 15, 2019

Deprecation of relabeling dicts in groupby.agg brings many issues

API Design

Groupby

Status: Closed (completed).

#18366 In pandas-dev/pandas;

· by zertrin was closed on May 30, 2019

Categorical dtype doesn't survive groupby of first, max, min, value_counts etc.: unwanted coercion to object

CategoricalCategorical Data TypeCategorical Data Type

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Enhancement

Groupby

Status: Closed (completed).

#18502 In pandas-dev/pandas;

· by dcolascione was closed on Jun 27, 2019

DEPS: drop 2.7 support

DependenciesRequired and optional dependenciesRequired and optional dependencies

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

Status: Closed (completed).

#18241 In pandas-dev/pandas;

· by jreback was closed on Jun 3, 2019

ENH: BusinessHour to support multiple opening and closing times per day

Enhancement

FrequencyDateOffsetsDateOffsets

Status: Closed (completed).

#15481 In pandas-dev/pandas;

· by jzwinck was closed on Jun 28, 2019

Behavior change in Index.equals from 0.18.0 to 0.19.0 -- intentional?

Docs

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

Status: Closed (completed).

#14411 In pandas-dev/pandas;

· by njsmith was closed on Jun 28, 2019

adding static type checking with mypy

CIContinuous IntegrationContinuous Integration

Clean

Typingtype annotations, mypy/pyright type checkingtype annotations, mypy/pyright type checking

Status: Closed (completed).

#14468 In pandas-dev/pandas;

· by jreback was closed on Mar 26, 2019

Change MultiIndex repr ?

MultiIndex

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

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

Status: Closed (completed).

#13480 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Jun 19, 2019

BUG/API Series/Index integer floordiv/mod inconsistency

Bug

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

Status: Closed (completed).

#13843 In pandas-dev/pandas;

· by sinhrks was closed on Jul 11, 2019

PERF: better use of searchsorted for indexing performance

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Closed (completed).

#14565 In pandas-dev/pandas;

· by jorisvandenbossche was closed on Feb 24, 2019

SparseSeries.__array__ only returns non-fills

API Design

SparseSparse Data TypeSparse Data Type

Status: Closed (completed).

#14167 In pandas-dev/pandas;

· by jnothman was closed on Oct 17, 2018