pandas-dev / pandas

117 Pull requests merged by 37 people

• TST: RollingGroupby(..., center=True, on=...)

  #37154 merged Oct 16, 2020

• BUG: Fix FloatingArray output formatting

  #36800 merged Oct 16, 2020

• DOC: Fix GL01 docstring errors in some functions

  #36875 merged Oct 16, 2020

• Update code_checks.sh to check for instances of os.remove

  #37097 merged Oct 16, 2020

• CI move check incorrect sphinx directives to pre-commit

  #37136 merged Oct 16, 2020

• DOC: capitalize Python as proper noun

  #37146 merged Oct 16, 2020

• DOC: Remove redundant table in Series docs

  #37143 merged Oct 16, 2020

• CLN: sync min versions

  #37147 merged Oct 16, 2020

• TST: test for expanding window with min_periods GH25857

  #37131 merged Oct 16, 2020

• Remove no-longer-necessary CI checks

  #37138 merged Oct 16, 2020

• CLN: indexing

  #37142 merged Oct 16, 2020

• REF/TYP: pandas/core/window/*.py

  #37091 merged Oct 15, 2020

• BUG: preserve timezone info when writing empty tz-aware frame to HDF5

  #37069 merged Oct 15, 2020

• PERF: compare RangeIndex to equal RangeIndex

  #37130 merged Oct 15, 2020

• Backport PR #35688 on branch 1.1.x: Fix GH-29442 DataFrame.groupby doesn't preserve _metadata

  #37122 merged Oct 15, 2020

• DOC: Add summary to interpolate

  #37042 merged Oct 15, 2020

• BUG: Raise ValueError with nan in timeaware windows

  #36822 merged Oct 15, 2020

• ERR: Removing quotation marks in error message

  #37120 merged Oct 15, 2020

• CI: remove xfail for numpy-dev on branch 1.1.x only

  #37082 merged Oct 14, 2020

• Fix GH-29442 DataFrame.groupby doesn't preserve _metadata

  #35688 merged Oct 14, 2020

• PERF: TimedeltaArray.__iter__

  #36551 merged Oct 14, 2020

• TST: add message matches to pytest.raises in test_duplicate_labels.py GH30999

  #37114 merged Oct 14, 2020

• REF/CLN: pandas/io/parsers.py

  #36852 merged Oct 14, 2020

• VIS: Accept xlabel and ylabel for scatter and hexbin plots

  #37102 merged Oct 14, 2020

• Revert "CLN: core/dtypes/cast.py::maybe_downcast_to_dtype"

  #37116 merged Oct 14, 2020

• BUG/CLN: Clean float / complex string formatting

  #36799 merged Oct 14, 2020

• TYP: core/dtypes/cast.py

  #37024 merged Oct 14, 2020

• DOC: Clarified pandas_version in to_json

  #37025 merged Oct 14, 2020

• CLN: core/dtypes/cast.py::maybe_downcast_to_dtype

  #37050 merged Oct 14, 2020

• Write pickle to file-like without intermediate in-memory buffer

  #37056 merged Oct 14, 2020

• TYP: mostly io, plotting

  #37059 merged Oct 14, 2020

• CLN: clean Index._id

  #37087 merged Oct 14, 2020

• CLN: in maybe_cast_to_integer_array assert that dtype arg is an integer dtype

  #37089 merged Oct 14, 2020

• CLN: remove unnecessary _validate_foo methods

  #37106 merged Oct 14, 2020

• CLN: ops, unnecessary mixin

  #37111 merged Oct 14, 2020

• CLN: runtime imports

  #37112 merged Oct 14, 2020

• BUG: IntervalArray.__eq__ not deferring to Series

  #36908 merged Oct 13, 2020

• REF: back IntervalArray by a single ndarray

  #37047 merged Oct 12, 2020

• CLN: remove unnecessary Categorical._validate_setitem_key

  #37068 merged Oct 12, 2020

• ENH: Use Kahan summation and Welfords method to calculate rolling var and std

  #37055 merged Oct 12, 2020

• PERF: ExpandingGroupby

  #37064 merged Oct 12, 2020

• Backport PR #37034 on branch 1.1.x (REGR: Fix casting of None to str during astype)

  #37076 merged Oct 12, 2020

• DOC: Improve what the `axis=` kwarg does for generic methods

  #37029 merged Oct 12, 2020

• REF/TYP: define Index methods non-dynamically

  #37038 merged Oct 12, 2020

• ENH: Implement sem for Rolling and Expanding

  #37043 merged Oct 12, 2020

• REF: define NDFrame inplace ops non-dynamically

  #37065 merged Oct 12, 2020

• use ensure_clean rather than explicit os.remove #34384

  #34385 merged Oct 12, 2020

• Backport PR #36937 on branch 1.1.x: BUG: GH36928 Allow dict_keys to be used as column names by read_csv

  #37078 merged Oct 12, 2020

• DOC: Clarify display.precision

  #37030 merged Oct 12, 2020

• Backport PR #37046 on branch 1.1.x: Add whatsnew for #36727

  #37079 merged Oct 12, 2020

• TYP: core.internals

  #37058 merged Oct 12, 2020

• CLN: remove inplace kwarg from NDFrame._consolidate

  #36906 merged Oct 12, 2020

• REF/TYP: use OpsMixin for StringArray

  #37061 merged Oct 12, 2020

• TYP: Misc groupby typing

  #37066 merged Oct 12, 2020

• TST: Verify parsing of data with encoded special characters (16218)

  #36841 merged Oct 12, 2020

• TST/CLN: relocate tests for PyTables roundtrip of timezone-aware Index

  #37060 merged Oct 12, 2020

• CLN: dont special-case DatetimeArray indexing

  #36654 merged Oct 12, 2020

• REF/TYP: use OpsMixin for DataFrame

  #37044 merged Oct 11, 2020

• REF: use OpsMixin in EAs

  #37049 merged Oct 11, 2020

• BUG: in DataFrame.reset_index() only call maybe_upcast_putmask with ndarrays

  #36876 merged Oct 11, 2020

• DOC: improve description of the example which dataframe has two rows

  #36971 merged Oct 11, 2020

• TST: insert 'match' to bare pytest raises in pandas/tests/tseries/off…

  #36865 merged Oct 11, 2020

• CLN: remove unnecessary DatetimeTZBlock.fillna

  #37040 merged Oct 11, 2020

• CI clean pre-commit: upgrade isort, use correct file types in flake8

  #37052 merged Oct 11, 2020

• DOC: Add whatsnew for #36727

  #37046 merged Oct 11, 2020

• TST: Fix failing test from #37027

  #37048 merged Oct 11, 2020

• MYPY: Delete unnecessary unused type hint

  #37045 merged Oct 11, 2020

• CLN: Simplify aggregation.aggregate

  #37033 merged Oct 10, 2020

• ENH: support of pandas.DataFrame.hist for datetime data

  #36287 merged Oct 10, 2020

• API: Deprecate regex=True default in Series.str.replace

  #36695 merged Oct 10, 2020

• DOC: Add GCS as supported filesystem for read_parquet

  #36958 merged Oct 10, 2020

• BUG: Add trailing trailing newline in to_json

  #36898 merged Oct 10, 2020

• CLN: Clean groupby tests

  #36925 merged Oct 10, 2020

• CLN: move maybe_casted_values from pandas/core/frame.py to pandas/core/dtype/cast.py

  #36985 merged Oct 10, 2020

• BUG: fix matplotlib warning on CN color

  #36981 merged Oct 10, 2020

• BUG: GroupBy.ffill()/bfill() do not return NaN values for NaN groups

  #36790 merged Oct 10, 2020

• API: reimplement FixedWindowIndexer.get_window_bounds

  #37035 merged Oct 10, 2020

• CI unpin flake8, only run flake8-rst in pre-commit

  #36722 merged Oct 10, 2020

• REF: separate flex from non-flex DataFrame ops

  #36843 merged Oct 10, 2020

• Call finalize in Series.str

  #37015 merged Oct 10, 2020

• REF/TYP: arrays.datetimelike

  #36932 merged Oct 10, 2020

• DOC: Clean merging.rst

  #37014 merged Oct 10, 2020

• CLN: clean libreduction

  #37036 merged Oct 10, 2020

• DOC: make return type documentation of series methods consistent #35409

  #36862 merged Oct 10, 2020

• REF: ignore_failures in BlockManager.reduce

  #35881 merged Oct 10, 2020

• REGR: Fix casting of None to str during astype

  #37034 merged Oct 10, 2020

• TYP: sas, stata, style

  #36990 merged Oct 10, 2020

• Add pandas-genomics to the ecosystem list

  #37008 merged Oct 10, 2020

• BUG: GH36928 Allow dict_keys to be used as column names by read_csv

  #36937 merged Oct 10, 2020

• TYP: clean unreachable code and duplicate test #27396

  #36935 merged Oct 10, 2020

• TYP: IntervalIndex.SetopCheck

  #36995 merged Oct 10, 2020

• REF/TYP: consistent return type for Block.replace

  #37010 merged Oct 10, 2020

• TYP/REF: use OpsMixin for arithmetic methods

  #36994 merged Oct 10, 2020

• BUG: DataFrame.diff with dt64 and NaTs

  #36998 merged Oct 10, 2020

• REF/TYP: define methods non-dynamically for SparseArray

  #36943 merged Oct 10, 2020

• FIX: fix cleanup warnings for errorbar timeseries

  #36982 merged Oct 10, 2020

• CLN: re-wrap docstrings in pandas\compat\numpy\function.py

  #36979 merged Oct 10, 2020

• CLN: share to_native_types

  #36965 merged Oct 10, 2020

• TYP: use OpsMixin for DecimalArray

  #36961 merged Oct 10, 2020

• DOC: add semicolons to suppress text repr of matplotlib objects in visualization.rst

  #36043 merged Oct 10, 2020

• DOC: Group relevant df.mask/df.where examples together

  #37032 merged Oct 10, 2020

• CLN: collected cleanups, warning suppression in tests

  #37021 merged Oct 10, 2020

• BUG: Raise ValueError instead of bare Exception in sanitize_array

  #35769 merged Oct 10, 2020

• CLN: require td64 in TimeDeltaBlock

  #37018 merged Oct 10, 2020

• REF/TYP: define NDFrame numeric methods non-dynamically

  #37017 merged Oct 10, 2020

• CLN/REF: de-duplicate DatetimeTZBlock.setitem

  #37019 merged Oct 10, 2020

• CI: pin pymysql #36465

  #36847 merged Oct 10, 2020

• TYP: generic, series, frame

  #36989 merged Oct 10, 2020

• TST: insert 'match' to bare pytest raises in pandas/tests/test_flags.py

  #37026 merged Oct 10, 2020

• TST: insert 'match' to bare pytest raises in pandas/tests/tools/test_…

  #37027 merged Oct 10, 2020

• TYP: check_untyped_defs core.indexes.base

  #36924 merged Oct 10, 2020

• TYP: io.json._json, util._decorators

  #36903 merged Oct 10, 2020

• DOC: pandas.Index.astype says it raises ValueError instead of TypeError

  #37013 merged Oct 10, 2020

• ERR: Better error message for MultiIndex.astype

  #37016 merged Oct 10, 2020

• REF: Remove rolling window fixed algorithms

  #36567 merged Oct 9, 2020

• CLN: standardize values coercion in Blocks

  #37009 merged Oct 9, 2020

• TST: RollingGroupby.count with closed specified

  #36934 merged Oct 9, 2020

35 Pull requests opened by 23 people

• REGR: fix bug in DatetimeIndex slicing with irregular or unsorted indices

  #37023 opened Oct 10, 2020

• Fixed metadata propagation in DataFrame.__getitem__

  #37037 opened Oct 10, 2020

• CI: move py39 build to conda #33948

  #37039 opened Oct 10, 2020

• BUG: set value with iloc and list like indexer

  #37041 opened Oct 10, 2020

• TST: Verify functioning of histtype argument (GH23992)

  #37063 opened Oct 11, 2020

• BUG: preserve timezone info when writing empty tz-aware series to HDF5

  #37072 opened Oct 12, 2020

• ENH: Add MultiIndex.dtypes

  #37073 opened Oct 12, 2020

• TST: Series constructor behavior is consistent for mixed float NaN and int dtype data

  #37090 opened Oct 12, 2020

• Gh 36562 typeerror comparison not supported between float and str

  #37096 opened Oct 13, 2020

• ENH: load_pickle(...) from zip containing hidden OS X/macOS metadata files/folders

  #37101 opened Oct 13, 2020

• CLN: unify numpy.random-related imports in pandas/tests/plotting

  #37103 opened Oct 13, 2020

• BUG: Fixes #36918 boxplots with matplotlib

  #37107 opened Oct 13, 2020

• TYP: fix typing errors for mypy==0.790, bump mypy version

  #37108 opened Oct 13, 2020

• PERF: Faster comparisons of indexes when compared to self

  #37109 opened Oct 13, 2020

• BLD: extract GH Actions check function to avoid duplication in code_checks.sh

  #37110 opened Oct 13, 2020

• CI: check for numpy.random-related imports

  #37117 opened Oct 14, 2020

• PERF: regression in DataFrame reduction ops performance #37081

  #37118 opened Oct 14, 2020

• REF: IntervalArray comparisons

  #37124 opened Oct 14, 2020

• Add test_masking_duplicate_columns

  #37125 opened Oct 14, 2020

• [REDO] CLN: core/dtypes/cast.py::maybe_downcast_to_dtype

  #37126 opened Oct 15, 2020

• TYP: add Shape alias to pandas._typing

  #37128 opened Oct 15, 2020

• ENH: DataFrame.to_parquet() returns bytes if path_or_buf not provided

  #37129 opened Oct 15, 2020

• BUG: raise when doing arithmetic on DataFrame and list of iterables

  #37132 opened Oct 15, 2020

• TYP: use overload to refine return type of reset_index

  #37137 opened Oct 15, 2020

• BUG: algos.diff with datetimelike and NaT

  #37140 opened Oct 15, 2020

• BLD: update build requirement for py39 #37135

  #37144 opened Oct 15, 2020

• BUG: Fix bug in quantile() for resample and groupby with Timedelta

  #37145 opened Oct 15, 2020

• BUG: DataFrame[td64].sum(skipna=False)

  #37148 opened Oct 15, 2020

• BUG: GroupBy().fillna() performance regression

  #37149 opened Oct 15, 2020

• BUG: RecursionError when selecting single column from IntervalIndex #26490

  #37152 opened Oct 16, 2020

• REF: avoid access to _mgr.blocks -> _mgr._is_single_block

  #37155 opened Oct 16, 2020

• CLN/REF: Refactor min_periods calculation in rolling

  #37156 opened Oct 16, 2020

• BUG: Fix parsing of ISO8601 durations

  #37159 opened Oct 16, 2020

• API: Index.__cmp__(Series) return NotImplemented

  #37160 opened Oct 16, 2020

• BUG: Series.loc[[]] with non-unique MultiIndex #13691

  #37161 opened Oct 16, 2020

62 Issues closed by 17 people

• ENH: No need to call _choose_path in Dataframe groupby transform function

  #37121 closed Oct 16, 2020

• BUG: groupby.rolling.mean seems to roll over different groups when center=True

  #37141 closed Oct 16, 2020

• BUG: Nullable floats can look like ints in repr

  #36775 closed Oct 16, 2020

• DOC: GL01 errors in shared_docs.py

  #36874 closed Oct 16, 2020

• Add CI check to check that `ensure_clean` is used instead of `os.remove`

  #37095 closed Oct 16, 2020

• expanding(min_periods=N).count(), for any N, returns same result as expanding(min_periods=1).count()

  #25857 closed Oct 16, 2020

• CI remove redundant checks covered by pyupgrade

  #37133 closed Oct 16, 2020

• iloc does not return a view on single slice

  #16593 closed Oct 15, 2020

• STY: avoid 1-letter variable names, especially pdb keywords

  #37123 closed Oct 15, 2020

• BUG: HDFStore failures on timezone-aware data

  #20594 closed Oct 15, 2020

• BUG: rolling aggregations not checking monotonic index when grouping by

  #34617 closed Oct 15, 2020

• October 2020 Developer Meeting

  #37077 closed Oct 14, 2020

• DataFrame.groupby doesn't preserve _metadata

  #29442 closed Oct 14, 2020

• Performance for TimedeltaArray.__iter__ and PeriodArray.__iter__

  #26713 closed Oct 14, 2020

• VIS: Allow xlabel and ylabel in DataFrame.plot.scatter plot and hexbin plot

  #37001 closed Oct 14, 2020

• BUG: Rolling mean with ~4k records returns infinite values on ~95% of the rows

  #37113 closed Oct 14, 2020

• Improve docs for pandas_version in Dataframe to_json(orient='table')

  #26637 closed Oct 14, 2020

• ENH: Support out-of-band pickling (protocol 5)

  #34244 closed Oct 14, 2020

• API: Series[dt64].astype(dt64tz) vs Datetime(Array|Index)[naive].astype(dt64tz)

  #37085 closed Oct 13, 2020

• DOC: add one more column may better

  #37075 closed Oct 13, 2020

• BUG: Passing datetime strings of the form "1-01-01 00:00:00"

  #37071 closed Oct 13, 2020

• Pandas MultiIndex causes out of memory error

  #36074 closed Oct 12, 2020

• Mismatch in Series/DataFrame boolean ops behavior

  #22724 closed Oct 12, 2020

• API: DataFrame.__and__ vs Series.__and__ fillna behavior mismatch

  #28466 closed Oct 12, 2020

• ENH/API: errors argument for ExtensionArray.astype

  #36151 closed Oct 12, 2020

• Improve docs on what the axis= kwarg does in individual functions/methods

  #29203 closed Oct 12, 2020

• Standard Error of the Mean Unavailable in RollingGroupby

  #26476 closed Oct 12, 2020

• TST: use ensure_clean rather than explicit os.remove

  #34384 closed Oct 12, 2020

• (Further) clarify documentation for display.precision

  #21004 closed Oct 12, 2020

• BUG: read_json fails to read data fields with ":\\"

  #37074 closed Oct 12, 2020

• Incorrect parsing of UTF-16 TSV if file includes Unicode 'FULLWIDTH COLON' (U+FF1A)

  #16218 closed Oct 12, 2020

• BUG: Series.ne() returns False for both NaN value even if something is passed to fill_value

  #23130 closed Oct 12, 2020

• API/DEPR: casting bool-indexer to slice in dt64/td64/period

  #36210 closed Oct 12, 2020

• BUG: Python 3.9 Polyfit sanity test emitted a warning

  #37057 closed Oct 11, 2020

• BUG: reset_index of MultiIndex with CategoricalIndex levels with missing values fails

  #24206 closed Oct 11, 2020

• DOC: improve description of the examplewhich dataframe has two rows

  #36970 closed Oct 11, 2020

• BUG: IntervalArray.__setitem__ creates copies incorrectly

  #27147 closed Oct 11, 2020

• API: DatetimeIndex.get_loc(datetime) should require tzawareness compat?

  #30994 closed Oct 11, 2020

• Histogram or kde from datetime column

  #32590 closed Oct 10, 2020

• BUG: to_json(lines=True) does not add a trailing newline

  #36888 closed Oct 10, 2020

• BUG: warning when using colors 'CN'

  #36972 closed Oct 10, 2020

• BUG: fillna(method="ffill") and ffill() on DataFrameGroupBy gives different results

  #34725 closed Oct 10, 2020

• BUG: Rolling min_periods not working on groupby object

  #36040 closed Oct 10, 2020

• CI: Linting errors from flake >= 3.8.1

  #34150 closed Oct 10, 2020

• API: disallow frame.__and__(other, axis="foo", fill_value="bar") etc

  #36796 closed Oct 10, 2020

• DOC: Fix code style in documentation

  #36777 closed Oct 10, 2020

• BUG: Index of an empty Series cannot be compared to a Timestamp anymore

  #36983 closed Oct 10, 2020

• DOC: Inconsistent return type documentation for functions with "inplace" option

  #35409 closed Oct 10, 2020

• REGR: change in Series.astype(str) behavior for None

  #36904 closed Oct 10, 2020

• BUG: `dict_keys` cannot be used as `pd.read_csv`'s `names` parameter

  #36928 closed Oct 10, 2020

• `DataFrame.diff` on `datetime64` returns result inconsistent with `Series.diff`

  #32441 closed Oct 10, 2020

• DOC: DataFrame.mask() uses df.where in the examples section

  #25187 closed Oct 10, 2020

• DataFrame.apply returns Series of type object instead of correct dtype

  #26223 closed Oct 10, 2020

• BUG: pd.Series() constructor with 2d NumPy array raises bare Exception

  #35744 closed Oct 10, 2020

• ENH: allow NaN value in str.place

  #37020 closed Oct 10, 2020

• BUG: DateOffset replaces month with given value instead of adding it to the current month.

  #37028 closed Oct 10, 2020

• DOC: pandas.Index.astype says it raises ValueError instead of TypeError

  #37012 closed Oct 10, 2020

• BUG: Incorrect data when modifying a dataframe column with +=

  #37011 closed Oct 9, 2020

• CLN: Standardize values coercion during Block initialization

  #19492 closed Oct 9, 2020

• BUG: Groupby rolling count with datetime not working correctly

  #35869 closed Oct 9, 2020

• CI: Compatibility with pytest-azurepipelines

  #27421 closed Oct 9, 2020

• assert_series_equal doesn't distinguish between different NA values

  #27613 closed Oct 9, 2020

29 Issues opened by 22 people

• BUG: unexpected behaviour using `.sample` without replacement and with weights as a series

  #37158 opened Oct 16, 2020

• BUG: pd.read_sql_table() raises unknown column error when column name of a table contains `%`

  #37157 opened Oct 16, 2020

• BUG: rolling.median/quantile does not work with (some) BaseIndexer subclasses

  #37153 opened Oct 16, 2020

• API/BUG: empty sum with td64 NaT or timedelta(0)?

  #37151 opened Oct 15, 2020

• BUG: Surprisingly large memory usage in groupby (but maybe I have the wrong mental model?)

  #37139 opened Oct 15, 2020

• BUG:Installation problem in python 3.9

  #37135 opened Oct 15, 2020

• Remove the Label alias in pandas._typing.

  #37134 opened Oct 15, 2020

• ENH: Aggregation with multiple columns in one function

  #37127 opened Oct 15, 2020

• typing_extensions

  #37119 opened Oct 14, 2020

• BUG: unstack on 'int' dtype prevent fillna to work

  #37115 opened Oct 14, 2020

• ENH: df.to_parquet() should return bytes

  #37105 opened Oct 13, 2020

• TYP: typing errors for mypy==0.790

  #37104 opened Oct 13, 2020

• BUG: Series.to_json produces incorrect json format

  #37100 opened Oct 13, 2020

• API: interaction between subclasses (implementing __finalize__) and attrs/flags handling in __finalize__

  #37099 opened Oct 13, 2020

• ENH: Support for loading pickles from OS X/macOS zip files containing extraneous "__MACOSX" folder and ".DS_STORE" file

  #37098 opened Oct 13, 2020

• BUG: Pandas 1.1.3 read_csv raises a TypeError when dtype, and index_col are provided, and file has >1M rows

  #37094 opened Oct 13, 2020

• BUG: groupby-transform produces NaN for series keys with as_index=False

  #37093 opened Oct 13, 2020

• ENH: read_sas only selected columns (and rows) of a large data file

  #37088 opened Oct 12, 2020

• SUMM: Consistent Casting and Length Checks in Ops

  #37086 opened Oct 12, 2020

• QST:AttributeError: module 'fsspec' has no attribute 'utils'

  #37084 opened Oct 12, 2020

• BUG: Empty object column writes to parquet as INT32 instead of BINARY L:STRING

  #37083 opened Oct 12, 2020

• PERF: regression in DataFrame reduction ops performance

  #37081 opened Oct 12, 2020

• DEPR: ExtensionOpsMixin in favor of OpsMixin

  #37080 opened Oct 12, 2020

• CI/TST: xfail in `test_parquet` has passed

  #37067 opened Oct 12, 2020

• ENH: MultiIndex.dtypes

  #37062 opened Oct 11, 2020

• CLN: unify numpy.random-related imports

  #37053 opened Oct 11, 2020

• ENH: Implement a more numerically stable algorithm for rolling var

  #37051 opened Oct 11, 2020

• PERF: Memory leaks after migrating from 0.25.3 to 1.1.3

  #37031 opened Oct 10, 2020

• PERF: Investivate potential performance improvements for rolling min/max

  #37022 opened Oct 10, 2020

146 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Proposal for future copy / view semantics in indexing operations

  #36195 commented on Oct 15, 2020 • 33 new comments

• BUG/REF: read_csv shouldn't close user-provided file handles

  #36997 commented on Oct 16, 2020 • 29 new comments

• TST/CLN: roll_sum/mean/var/skew/kurt: simplification for non-monotonic indices

  #36933 commented on Oct 16, 2020 • 13 new comments

• DEPR: Deprecate use of strings denoting units with 'M', 'Y', 'm' or 'y' in pd.to_timedelta (36666)

  #36838 commented on Oct 16, 2020 • 12 new comments

• API/DEPR: Deprecate inplace parameter

  #16529 commented on Oct 14, 2020 • 9 new comments

• BUG: Index.astype does not localize to UTC first like Series.astype with datetime64[ns, tz] dtypes

  #33401 commented on Oct 14, 2020 • 9 new comments

• BUG: Groupy dropped nan groups from result when grouping over single column

  #36842 commented on Oct 16, 2020 • 9 new comments

• Implement DataFrame.__array_ufunc__

  #36955 commented on Oct 11, 2020 • 7 new comments

• BUG: pd.array([timedelta_like_strings]) should infer TimedeltaArray

  #33558 commented on Oct 13, 2020 • 6 new comments

• BUG: "cannot reindex from duplicate axis" thrown using unique indexes, duplicated column names and a specific numpy array values

  #31954 commented on Oct 16, 2020 • 6 new comments

• Partial Selection on MultiIndex: The need for empty slice support & dict indexing

  #4036 commented on Oct 13, 2020 • 5 new comments

• CLN: clean up new detected trailing whitespace

  #36588 commented on Oct 14, 2020 • 5 new comments

• PERF: using murmur hash for float64 khash-tables

  #36729 commented on Oct 15, 2020 • 5 new comments

• BUG: Timedelta drops decimals if precision is greater than nanoseconds

  #36771 commented on Oct 11, 2020 • 5 new comments

• regression fix for merging DF with datetime index with empty DF

  #36897 commented on Oct 12, 2020 • 5 new comments

• BUG: Horizontal boxplots on subplots throws ValueError

  #36918 commented on Oct 13, 2020 • 4 new comments

• TST: astyp via loc to int64

  #36942 commented on Oct 11, 2020 • 4 new comments

• BUG: in read_excel for mangled columns only the original/first column dtype is correct, col.N is not parsed correctly

  #35211 commented on Oct 13, 2020 • 3 new comments

• Feature to read csv from hdfs:// URL

  #18199 commented on Oct 13, 2020 • 3 new comments

• Numerical issue with rolling cov and corr

  #24019 commented on Oct 14, 2020 • 3 new comments

• BUG: GroupBy().fillna() performance regression

  #36757 commented on Oct 16, 2020 • 3 new comments

• pd.where OverflowError with large numbers

  #31687 commented on Oct 16, 2020 • 3 new comments

• ENH: Select numeric ExtensionDtypes with DataFrame.select_dtypes

  #35341 commented on Oct 11, 2020 • 3 new comments

• BUG: df[col] = arr should not overwrite data in df[col]

  #35417 commented on Oct 16, 2020 • 3 new comments

• ENH: Enable short_caption in to_latex

  #35668 commented on Oct 12, 2020 • 3 new comments

• Fix unable to build Pandas with xlc on z/OS

  #35829 commented on Oct 13, 2020 • 3 new comments

• ENH: Support MultiIndex columns in parquet (#34777)

  #36305 commented on Oct 11, 2020 • 3 new comments

• CI/BLD: Restrict ci/code_checks.sh to tracked repo files

  #36386 commented on Oct 14, 2020 • 3 new comments

• BUG: replacing a string with None causes an unexpected forward fill

  #36984 commented on Oct 10, 2020 • 2 new comments

• API: series.values EA or ndarray[object]?

  #36957 commented on Oct 10, 2020 • 2 new comments

• Please add force_suffixes to pandas.merge()

  #17834 commented on Oct 12, 2020 • 2 new comments

• BUG: 'Series' objects are mutable, thus they cannot be hashed

  #34251 commented on Oct 12, 2020 • 2 new comments

• Slicing Datetime MultiIndex with string or datetime.date slices

  #15906 commented on Oct 14, 2020 • 2 new comments

• ExtensionArray.value_counts

  #22843 commented on Oct 14, 2020 • 2 new comments

• API: should allow setting with enlargement with list-likes

  #7887 commented on Oct 15, 2020 • 2 new comments

• DataFrame with MultiIndex raises `TypeError` instead of `KeyError` for inexistent keys

  #27420 commented on Oct 15, 2020 • 2 new comments

• Pandas Series Construction Extremely Slow for Array of Large Series

  #25364 commented on Oct 16, 2020 • 2 new comments

• DataFrameGroupby.boxplot fails when subplots=False

  #28102 commented on Oct 14, 2020 • 2 new comments

• Add fix to raise error when category value 'x' is not predefined but is assigned through df.loc[..]=x

  #34011 commented on Oct 14, 2020 • 2 new comments

• Fix: StringArray non-extensible due to inconsisent assertion

  #34310 commented on Oct 9, 2020 • 2 new comments

• CLN: dont consolidate in reshape.concat

  #34683 commented on Oct 16, 2020 • 2 new comments

• API: Honor copy for dict-input in DataFrame

  #34872 commented on Oct 12, 2020 • 2 new comments

• BUG: Index.get_indexer_non_unique misbehaves with multiple nan

  #35498 commented on Oct 13, 2020 • 2 new comments

• ENH: implement timeszones support for read_json(orient='table') and astype() from 'object'

  #35973 commented on Oct 9, 2020 • 2 new comments

• POC: ArrayManager -- array-based data manager for columnar store

  #36010 commented on Oct 16, 2020 • 2 new comments

• BUG: pandas.DataFrame().stack() raise an error, while expected is empty

  #36185 commented on Oct 10, 2020 • 2 new comments

• BUG: Don't raise for NDFrame.mask with nullable boolean

  #36201 commented on Oct 11, 2020 • 2 new comments

• TST GH 29699 multilevel column is called after multiple appends

  #36230 commented on Oct 13, 2020 • 2 new comments

• BUG: DataFrame.pivot drops column level names when both rows and columns are multiindexed

  #36655 commented on Oct 11, 2020 • 2 new comments

• BUG: Don't ignore na_rep in DataFrame.to_html

  #36690 commented on Oct 14, 2020 • 2 new comments

• Fix/empty string datetimelike conversion/issue 36550

  #36834 commented on Oct 16, 2020 • 2 new comments

• BUG: df.replace over pd.Period columns (#34871)

  #36867 commented on Oct 15, 2020 • 2 new comments

• DOC: Update dependency for to_markdown documentation

  #36938 commented on Oct 10, 2020 • 2 new comments

• DOC: Added indexing views to roadmap

  #36988 commented on Oct 9, 2020 • 2 new comments

• assert_frame_equal not differentiating NaN and None within object dtype

  #18463 commented on Oct 9, 2020 • 1 new comment

• Bad Error message / docs for Categorical.fillna with dict `value`

  #19705 commented on Oct 9, 2020 • 1 new comment

• BUG: loc with empty multiindex raises exception

  #36936 commented on Oct 9, 2020 • 1 new comment

• BUG: aggfunc use different default arguments in pivot_table

  #36508 commented on Oct 9, 2020 • 1 new comment

• pd.read_csv automatically casts strings into int/float

  #31821 commented on Oct 10, 2020 • 1 new comment

• Add Styler.applyformat to set values instead of styles

  #28013 commented on Oct 10, 2020 • 1 new comment

• pd.Interval default closed='right'?

  #25396 commented on Oct 11, 2020 • 1 new comment

• Pandas pytables interface doesn't create empty table datasets

  #13016 commented on Oct 11, 2020 • 1 new comment

• to_csv fails silently when writing to S3 (only 1 time out of 50,000)

  #36828 commented on Oct 11, 2020 • 1 new comment

• Incorrect multi-index specific level sorting after an align

  #34141 commented on Oct 11, 2020 • 1 new comment

• Series.rmod called with scalar returns inconsistent results based on size of series

  #29602 commented on Oct 11, 2020 • 1 new comment

• agg behaviour depends on the number of arguments of the function

  #33242 commented on Oct 11, 2020 • 1 new comment

• Update setting data pointers for Cython 3

  #34014 commented on Oct 11, 2020 • 1 new comment

• step option does not work for hist

  #23992 commented on Oct 11, 2020 • 1 new comment

• BUG: RecursionError when aligning column MultiIndex

  #33765 commented on Oct 11, 2020 • 1 new comment

• BUG: pd.DataFrame.add() does not broadcast across levels, when level is None

  #34388 commented on Oct 11, 2020 • 1 new comment

• BUG: StringArray non-extensible due to inconsisent assertion

  #34309 commented on Oct 12, 2020 • 1 new comment

• Improve type handling in read_sql and read_sql_table

  #13049 commented on Oct 12, 2020 • 1 new comment

• Series constructor with missing values and int dtype fails or passes depending on data type

  #22585 commented on Oct 12, 2020 • 1 new comment

• Difference between count and nunique formatting

  #32463 commented on Oct 12, 2020 • 1 new comment

• BUG: dataframe.any() method behaves differently for empty rows and columns

  #35450 commented on Oct 13, 2020 • 1 new comment

• BUG: read_csv with both names and parse_date raises 'NoneType' TypeError

  #33699 commented on Oct 13, 2020 • 1 new comment

• qcut doesn't always properly distribute across bins

  #16585 commented on Oct 13, 2020 • 1 new comment

• BUG: DataFrameGroupBy.transform with axis=1 fails

  #36308 commented on Oct 14, 2020 • 1 new comment

• ENH: Add some features like R data.table's fread() function.

  #35043 commented on Oct 14, 2020 • 1 new comment

• [Good first issue] TST: Disallow bare pytest.raises

  #30999 commented on Oct 14, 2020 • 1 new comment

• QST: Howto write a custom DateOffset

  #35569 commented on Oct 14, 2020 • 1 new comment

• Categorical in GroupBy with aggregations raise error under specific conditions

  #36698 commented on Oct 14, 2020 • 1 new comment

• BUG: String upgraded to complex128 (and cascading to other columns) in df.mean() and df.agg('mean')

  #36703 commented on Oct 14, 2020 • 1 new comment

• EA: revisit interface

  #32586 commented on Oct 15, 2020 • 1 new comment

• API: timeseries accessors naming convention

  #9606 commented on Oct 15, 2020 • 1 new comment

• pandas.Dataframe.interpolate() does not extrapolate even if it is asked to, depending on interpolation method

  #31949 commented on Oct 15, 2020 • 1 new comment

• DOC: df.to_sql `chunksize` seems to be ignored by default.

  #35891 commented on Oct 15, 2020 • 1 new comment

• Groupby behaviour of missing zeros

  #28572 commented on Oct 15, 2020 • 1 new comment

• ENH: implement drop_levels argument in loc

  #35418 commented on Oct 15, 2020 • 1 new comment

• TypeError in Index.get_indexer_non_unique if Index.is_all_dates

  #19187 commented on Oct 15, 2020 • 1 new comment

• BUG: iterrows encounters OverflowError with str and datetime64[ns] columns

  #35665 commented on Oct 15, 2020 • 1 new comment

• ERR: more helpful error message on invalid access with a timestamp-like

  #7211 commented on Oct 15, 2020 • 1 new comment

• frame and columns can get out of sync

  #13569 commented on Oct 16, 2020 • 1 new comment

• ENH/BUG: support a column interval index

  #17130 commented on Oct 16, 2020 • 1 new comment

• Support downcasting of nullable arrays

  #33435 commented on Oct 12, 2020 • 1 new comment

• Roll quantile support multiple quantiles as per #12093: rough sketch for discussion

  #33843 commented on Oct 13, 2020 • 1 new comment

• DOC: use the sphinx-panels extension for cards instead of raw html

  #34065 commented on Oct 15, 2020 • 1 new comment

• ENH: allow storing ExtensionArrays in the Index

  #34159 commented on Oct 12, 2020 • 1 new comment

• Revert "CLN: _consolidate_inplace less"

  #34407 commented on Oct 14, 2020 • 1 new comment

• Coding Style Guidline.rst

  #34608 commented on Oct 12, 2020 • 1 new comment

• BUG: Cannot create third-party ExtensionArrays for datetime types (xfail)

  #34987 commented on Oct 14, 2020 • 1 new comment

• Document Tips for Debugging C Extensions

  #35100 commented on Oct 9, 2020 • 1 new comment

• paste_windows() wrong arg for c_wchar_p

  #35947 commented on Oct 10, 2020 • 1 new comment

• ENH: Arithmetic with Timestamp-based intervals

  #36001 commented on Oct 14, 2020 • 1 new comment

• BUG: 35977 Adding regex support for ExtensionBlock replace method

  #36038 commented on Oct 16, 2020 • 1 new comment

• [BUG]: Groupy and Resample miscalculated aggregation

  #36198 commented on Oct 15, 2020 • 1 new comment

• Maintain inplace operation on series

  #36498 commented on Oct 14, 2020 • 1 new comment

• REF: simplify info.py

  #36752 commented on Oct 9, 2020 • 1 new comment

• ENH: allow for top and mid-level assignment to DataFrames with MultIndex columns #7475

  #36755 commented on Oct 12, 2020 • 1 new comment

• BUG: Fix duplicates in intersection of multiindexes

  #36927 commented on Oct 11, 2020 • 1 new comment

• Failing test_missing_required_dependency in pandas-wheels

  #33999 commented on Oct 9, 2020 • 0 new comments

• BUG: groupby(..., dropna=False).indices with single group key does not include nan group

  #35646 commented on Oct 10, 2020 • 0 new comments

• BUG: Groupby dropna=False argument unexpected behaviour with rolling window

  #35542 commented on Oct 10, 2020 • 0 new comments

• Assigned conversion via loc to Int64 fails under peculiar conditions

  #31861 commented on Oct 10, 2020 • 0 new comments

• ENH: Support Multi-Index for columns in parquet format

  #34777 commented on Oct 10, 2020 • 0 new comments

• CI: Move Python 3.9 Build to Conda

  #33948 commented on Oct 10, 2020 • 0 new comments

• BUG: Merging two data frames on a datetime index where one index is Object data type

  #36895 commented on Oct 10, 2020 • 0 new comments

• BUG: ValueError: Cannot convert non-finite values (NA or inf) to integer only when DF exceed certain size

  #35227 commented on Oct 10, 2020 • 0 new comments

• DataFrameGroupBy.boxplot with subplots=False fails when using column param

  #16748 commented on Oct 10, 2020 • 0 new comments

• Grouping by all columns of an empty DataFrame should produce MultiIndex, but doesn't

  #32464 commented on Oct 11, 2020 • 0 new comments

• API: read_excel's header and index_col handling rules

  #34766 commented on Oct 11, 2020 • 0 new comments

• PeriodIndex.ravel returns ndarray[int64]

  #19956 commented on Oct 12, 2020 • 0 new comments

• BUG: series.eq(other) does not equal series == other when the series contain pd.NA

  #36941 commented on Oct 12, 2020 • 0 new comments

• DEPR: |&^ as set operations for Index

  #36758 commented on Oct 12, 2020 • 0 new comments

• DEPR: Index == Series should return NotImplemented

  #36759 commented on Oct 12, 2020 • 0 new comments

• ENH: Add option for `to_json` function to discard null values

  #36912 commented on Oct 12, 2020 • 0 new comments

• BUG?: should ComplexBlock._can_hold_element/should_store check itemsize?

  #32878 commented on Oct 12, 2020 • 0 new comments

• mean with skipna either True or False on groupby gives error

  #32696 commented on Oct 12, 2020 • 0 new comments

• Memory leaks if an object is saved in a DataFrame and references the DataFrame

  #32433 commented on Oct 12, 2020 • 0 new comments

• Using scipy's entropy function with "string" dtype

  #32234 commented on Oct 12, 2020 • 0 new comments

• TYPING: Unreachable code

  #27396 commented on Oct 12, 2020 • 0 new comments

• DataFrame vs Series vs Index arithmetic Roundup

  #18824 commented on Oct 13, 2020 • 0 new comments

• API: More direct way to determine which rows cause pd.to_numeric to coerce to 'NA' or raise ValueError

  #32818 commented on Oct 13, 2020 • 0 new comments

• BUG: TypeError: '<' not supported between instances of 'float' and 'str' when using `.combine_first` with categorical index containing nan

  #36562 commented on Oct 14, 2020 • 0 new comments

• Undocumented behavior change (1.0.5->1.1.0) when using arithmetic operations on dataframes

  #36702 commented on Oct 15, 2020 • 0 new comments

• 'IntegerArray' object has no attribute 'T'

  #32342 commented on Oct 15, 2020 • 0 new comments

• PERF: regression in reindex. Pandas 0.23.4 is 60x slower than 0.22.0 with a MultiIndex with datetime64

  #23735 commented on Oct 15, 2020 • 0 new comments

• Aliases for column names

  #11723 commented on Oct 15, 2020 • 0 new comments

• BUG: Summation of NaT in a DataFrame with axis=1 does not return NaT

  #17235 commented on Oct 16, 2020 • 0 new comments

• RecursionError when selecting single column from IntervalIndex

  #26490 commented on Oct 16, 2020 • 0 new comments

• s.loc[[]] raises error (only) if index is not unique

  #13691 commented on Oct 16, 2020 • 0 new comments

• Add HTML repr for groupby dataframe and series

  #34926 commented on Oct 11, 2020 • 0 new comments

• ENH: support index=True/False keyword for io.sql.get_schema

  #35063 commented on Oct 11, 2020 • 0 new comments

• BUG: DataFrame.groupby(., dropna=True, axis=0) incorrectly throws ShapeError

  #35751 commented on Oct 11, 2020 • 0 new comments

• BUG: Timestamp == date match stdlib

  #36131 commented on Oct 14, 2020 • 0 new comments

• BUG: df.to_markdown() with empty frame incorrect output

  #36233 commented on Oct 12, 2020 • 0 new comments