38 Pull requests merged by 19 people

• Bug Fix: pd.DataFrame.sum with min_count changes dtype if result contains NaNs

  #47091 merged May 29, 2022

• Backport PR #47159 on branch 1.4.x (TST: Re-enable test after Cython upgrade)

  #47161 merged May 29, 2022

• TST: Re-enable test after Cython upgrade

  #47159 merged May 28, 2022

• TYP: Upgrade mypy to 0.960

  #47140 merged May 28, 2022

• Backport PR #47051 on branch 1.4.x (BUG: `DataFrame.shift` shows different behavior for `axis=1` when `freq` is specified)

  #47158 merged May 28, 2022

• BUG: `DataFrame.shift` shows different behavior for `axis=1` when `freq` is specified

  #47051 merged May 28, 2022

• Backport PR #47150 on branch 1.4.x (DEPS: Bump Cython)

  #47152 merged May 28, 2022

• ENH: Move SettingWithCopyError to error/__init__.py per GH27656

  #47151 merged May 27, 2022

• DEPS: Bump Cython

  #47150 merged May 27, 2022

• make series axis parameter docs consistent

  #47109 merged May 27, 2022

• Add note about different series lengths to Series.corr and Series.cov docs

  #47145 merged May 27, 2022

• Backport PR #47093 on branch 1.4.x (DOC/CI: Use more explicit data setup in user guides)

  #47144 merged May 27, 2022

• Backport PR #47139 on branch 1.4.x (REGR: index_col False and header=None inferring index names in some cases)

  #47142 merged May 27, 2022

• BUG: read_csv adding additional columns as integers instead of strings

  #47137 merged May 27, 2022

• Backport PR #47135 on branch 1.4.x (CLN: ensure clean up styler tests)

  #47141 merged May 27, 2022

• REGR: index_col False and header=None inferring index names in some cases

  #47139 merged May 27, 2022

• BUG: Resampler attempts to aggregate the `on` column

  #47107 merged May 27, 2022

• DOC/CI: Use more explicit data setup in user guides

  #47093 merged May 27, 2022

• Remove ctime.pyx

  #47133 merged May 27, 2022

• DOC: Improve reshape\concat

  #47061 merged May 27, 2022

• CLN: ensure clean up styler tests

  #47135 merged May 27, 2022

• sync "inplace" document strings anywhere possible

  #47122 merged May 26, 2022

• Fix typo in tz_convert docs

  #47131 merged May 26, 2022

• infer_freq handle non-nano

  #47126 merged May 26, 2022

• BUG: Fix `set_sticky` background

  #47082 merged May 26, 2022

• ENH: move SpecificationError to error/__init__.py

  #47089 merged May 26, 2022

• Backport PR #46636 on branch 1.4.x (REGR: Replace changes the dtype of other columns)

  #47123 merged May 26, 2022

• TYP: CallableDynamicDoc

  #46786 merged May 26, 2022

• TYP: resolve mypy ingores in core/indexing.py

  #47010 merged May 25, 2022

• REGR: Replace changes the dtype of other columns

  #46636 merged May 25, 2022

• TYP: narrow type bounds on extract_array

  #46942 merged May 25, 2022

• TYP: Mypy workaround for NoDefault

  #47045 merged May 25, 2022

• TST: add copy/view test for setting columns with an array/series

  #47070 merged May 25, 2022

• Changes as requested in #47058

  #47119 merged May 25, 2022

• Backport PR #47096 on branch 1.4.x (fix pandas.show_versions() and remove pin for setuptools)

  #47118 merged May 25, 2022

• fix pandas.show_versions() and remove pin for setuptools

  #47096 merged May 25, 2022

• BUG Fix: Cannot read pickle generate_legacy_storage_files version 1.4.2 under environment pandas version 1.5.0 (incompatibilites issue)

  #47104 merged May 24, 2022

• DEPR: df.iloc[:, foo] = bar attempt to set inplace

  #45333 merged May 23, 2022

20 Pull requests opened by 11 people

• Fix segfault with printing dataframe

  #47097 opened May 23, 2022

• Fix SAS7BDAT run-length encoding formula

  #47099 opened May 23, 2022

• Convert ExtensionDtype class objects to instances of that class

  #47108 opened May 24, 2022

• astype_overflowsafe handle timedelta64

  #47110 opened May 25, 2022

• BUG Avoid IndexError on writing empty (row) MI df to excel (GH19543)

  #47111 opened May 25, 2022

• Fix SAS 0x40 control byte handling and column name parsing

  #47113 opened May 25, 2022

• DOC: added copy functionality in code blocks

  #47114 opened May 25, 2022

• Fix reading some RDC compressed pages

  #47115 opened May 25, 2022

• Fix reading SAS7BDAT files with zero rows

  #47116 opened May 25, 2022

• ENH: DatetimeTZDtype support non-nano

  #47120 opened May 25, 2022

• BUG: read_excel loading some xlsx ints as floats

  #47121 opened May 25, 2022

• TYP: read_csv/table (names index_col)

  #47124 opened May 25, 2022

• REGR: setitem writing into RangeIndex instead of creating a copy

  #47143 opened May 27, 2022

• Properly propagate exceptions in sas.pyx

  #47149 opened May 27, 2022

• CLN: do not suppress errors when closing file handles

  #47153 opened May 27, 2022

• Allow reading SAS files from archives

  #47154 opened May 27, 2022

• DEPR: na_sentinel in factorize

  #47157 opened May 28, 2022

• ENH: implement Timedelta._as_unit

  #47162 opened May 29, 2022

• DOC: how to_datetime %S differs from strptime

  #47164 opened May 29, 2022

• BUG: do not suppress errors when closing file handles

  #47165 opened May 29, 2022

35 Issues closed by 11 people

• BUG: pandas.cut doesnt respect to `precision=3` when `include_lowest=True`

  #46797 closed May 29, 2022

• BUG: pd.DataFrame.sum with min_count changes dtype if result contains NaNs

  #46947 closed May 29, 2022

• BUG: equal-valued series should work with qcut

  #47156 closed May 29, 2022

• BUG: Maximum call stack size exceeded when indexing

  #47155 closed May 28, 2022

• BUG: `DataFrame.shift` shows different behavior for `axis=1` when `freq` is specified

  #47039 closed May 28, 2022

• CI: py 3.10 build failing

  #41935 closed May 28, 2022

• DOC: unused Series axis parameter arbitrarily defaults to 0 or None

  #47146 closed May 27, 2022

• DOC: Series.rolling and DataFrame.rolling share docstring

  #45969 closed May 27, 2022

• BUG: Series.clip should not take axis argument

  #47100 closed May 27, 2022

• DOC/BUG: correlation between series of different lengths

  #34602 closed May 27, 2022

• BUG: ExcelWriter append mode='a' not work

  #46840 closed May 27, 2022

• Leading zeros in data for read_excel vs read_csv

  #46895 closed May 27, 2022

• BUG: Groupby does not work with mean/sum function on columns

  #46916 closed May 27, 2022

• BUG: read_csv(index_col=False) -> auto-generated column headers for variable row length get headers of type int

  #46997 closed May 27, 2022

• BUG: index_col=False doesn't work for unequal length of data

  #46955 closed May 27, 2022

• BUG: resample ops includes sampled column

  #47079 closed May 27, 2022

• DOC: write guide for how to replace append

  #46825 closed May 27, 2022

• BUG: `DataFrame.groupby.agg` has inconsistent behaviour depending on `DataFrame.groupby` `by`'s Iterable length and use of `DataFrame.groupby.agg`'s `*args`/`**kwargs`

  #47092 closed May 27, 2022

• BUG or DOC: NaNs generated when enlarge DataFrame with loc[:, cols] with a DataFrame RHS

  #47112 closed May 27, 2022

• DOC: DataFrame.rename Method

  #47030 closed May 26, 2022

• DOC: tz_convert docs could be improved for Series and DataFrame

  #47129 closed May 26, 2022

• Link from, for e.g., version/0.22/generate, to stable/reference

  #26922 closed May 26, 2022

• ADMIN: display issue metrics

  #30576 closed May 26, 2022

• BUG: Style.set_sticky() doesn’t work with dark mode

  #46984 closed May 26, 2022

• BUG: Replace changes the dtype of other columns

  #46634 closed May 25, 2022

• DOC: Improve documentation for mode parameter in to_csv() method

  #47058 closed May 25, 2022

• ENH: Support conditional selection for DataFrame.at

  #46977 closed May 25, 2022

• CI: Builds failing in ``pandas.show_versions()``

  #44980 closed May 25, 2022

• BUG: Partial support only for extension DTypes in `pandas.core.dtypes.common`

  #45417 closed May 25, 2022

• BUG: Cannot read pickle generate_legacy_storage_files version 1.4.2 under environment pandas version 1.5.0 (incompatibilites issue)

  #47090 closed May 24, 2022

• Issue template versions command no longer works

  #47106 closed May 24, 2022

• BUG: Converting `pd.Timestamp.min` to equivalent pydatetime object and back raises `OutOfBoundsDatetime`

  #46154 closed May 24, 2022

• BUG/API: DataFrame.iloc[:, foo] = bar inplaceness?

  #44353 closed May 23, 2022

• BUG: `pd.read_json` throwing error on `bytes` input

  #46935 closed May 23, 2022

• QST: \n when opening a .csv with Pandas

  #47095 closed May 23, 2022

18 Issues opened by 18 people

• BUG: Docker build without cache leads to error due to identity issues

  #47163 opened May 29, 2022

• EA: How much of the EA API can we commit to?

  #47148 opened May 27, 2022

• BUG: Crosstab inconsistent with using aggfunc=sum when MultiIndex has category

  #47147 opened May 27, 2022

• BUG: usecols behaving differently between c and python

  #47138 opened May 27, 2022

• BUG: Pandas should not swallow exceptions when close()ing a write handle

  #47136 opened May 27, 2022

• DOC: how to_datetime %S differs from strptime

  #47134 opened May 27, 2022

• BUG: Series.corr() returns nan for identical Series objects of length 1

  #47132 opened May 26, 2022

• ENH: Add is_dst attribute to DatetimeIndex

  #47130 opened May 26, 2022

• BUG: RangeIndex problem

  #47128 opened May 26, 2022

• BUG: concat column order behaviors changes after 1.4

  #47127 opened May 26, 2022

• BUG: trying to assign to a dataframe with a boolean index fails with boolean dtype

  #47125 opened May 26, 2022

• ENH: Shall we let pd.NA * 0 equals to zero?

  #47117 opened May 25, 2022

• BUG: nan comparisons behave differently on identical objects

  #47105 opened May 24, 2022

• BUG: style.format na_rep raises error with list elements

  #47103 opened May 24, 2022

• BUG: HDFStore: Compression not supported on Fixed format stores

  #47102 opened May 24, 2022

• BUG: AttributeError: 'bool' object has no attribute 'to_numpy' in "mask_missing" method of core/missing.py

  #47101 opened May 24, 2022

• BUG: Join() Does NOT Preserve Calling DataFrame Index Orders with Multi-Index

  #47098 opened May 23, 2022

• BUG: pd.Series.mode failed to give expected result when it is embedded inside groupby.transform

  #47094 opened May 23, 2022

65 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.

• ENH: Incorproate ArrowDtype into ArrowExtensionArray

  #47034 commented on May 27, 2022 • 25 new comments

• REF: Add Manager.column_setitem to set values into a single column (without intermediate series)

  #47074 commented on May 25, 2022 • 15 new comments

• [EHN] pandas.DataFrame.to_orc

  #44554 commented on May 30, 2022 • 13 new comments

• ENH: Feature Request for Ungroup Method for Grouped Data Frames

  #43902 commented on May 29, 2022 • 6 new comments

• BLD: Build shared c dependencies as a library

  #47081 commented on May 24, 2022 • 6 new comments

• BUG: Eval scopes ignoring empty dictionaries (#47084)

  #47085 commented on May 25, 2022 • 6 new comments

• Proposal for future copy / view semantics in indexing operations

  #36195 commented on May 25, 2022 • 5 new comments

• BUG: Segfault when printing dataframe

  #46848 commented on May 26, 2022 • 5 new comments

• Deprecate na_sentinel being None in pd.factorize, add dropna

  #46910 commented on May 27, 2022 • 5 new comments

• ENH: consistency of input args for boundaries - Interval

  #46522 commented on May 29, 2022 • 5 new comments

• TYP: resolve mypy ignores in core/apply.py

  #47066 commented on May 29, 2022 • 5 new comments

• Bug46381 - Add `storage_option` parameter to to_excel method in Styler

  #46491 commented on May 25, 2022 • 4 new comments

• Add setup-conda action

  #46611 commented on May 29, 2022 • 4 new comments

• PERF: Slow performance of to_dict (#46470)

  #46487 commented on May 24, 2022 • 3 new comments

• Update join docs for other param

  #46850 commented on May 28, 2022 • 3 new comments

• API/TST: add tests for new copy/view behaviour

  #46979 commented on May 25, 2022 • 3 new comments

• Simplify Timedelta init, standardize overflow errors

  #47004 commented on May 24, 2022 • 3 new comments

• ENH: Support Python 3.11

  #46680 commented on May 23, 2022 • 2 new comments

• BUG: Reset index regression

  #47071 commented on May 24, 2022 • 2 new comments

• BUG: Setting values on a multiindex df, via loc, does nothing on 1.4.x

  #46983 commented on May 27, 2022 • 2 new comments

• astype(str) / astype_unicode: np.nan converted to "nan" (checknull, skipna)

  #25353 commented on May 27, 2022 • 2 new comments

• BUG: CategoricalDtype is not refresh after index categories set

  #46820 commented on May 28, 2022 • 2 new comments

• DOC: Wrong Series.rename parameter documentation

  #46889 commented on May 30, 2022 • 2 new comments

• Absolute value or minus sign missing in docstrings for head and tail

  #42204 commented on May 30, 2022 • 2 new comments

• Try to fix groupby_valuecount

  #46846 commented on May 26, 2022 • 2 new comments

• pd.read_csv automatically casts strings into int/float

  #31821 commented on May 23, 2022 • 1 new comment

• ENH: Allow storing timezone-aware datetimes in a series with a datetime64 dtype

  #46998 commented on May 23, 2022 • 1 new comment

• DOC: splitting the IO docs into separate pages

  #10446 commented on May 24, 2022 • 1 new comment

• BUG: to_excel to throw IndexError for dataframe with empty (row) MultiIndex

  #19543 commented on May 24, 2022 • 1 new comment

• BUG: Problem importing compressed dataset (with repro datasets)

  #35545 commented on May 24, 2022 • 1 new comment

• merge_asof on multiple columns?

  #20369 commented on May 24, 2022 • 1 new comment

• Resampling on index and column after groupby give different results

  #30057 commented on May 24, 2022 • 1 new comment

• BUG: column labels converted to string in merge

  #46885 commented on May 24, 2022 • 1 new comment

• PERF: performance regression in assigning value to df[col_name]

  #46267 commented on May 25, 2022 • 1 new comment

• BUG: NaNs generated when mutating subset of column MultiIndex via loc

  #45751 commented on May 25, 2022 • 1 new comment

• Add interactive terminal to pandas website

  #46682 commented on May 25, 2022 • 1 new comment

• BUG: not able to convert non-zero padded hour to timestamp.

  #46849 commented on May 26, 2022 • 1 new comment

• BUG: `pd.MultiIndex.reindex` when the levels are `pd.Int64Index` behaves differently.

  #46833 commented on May 26, 2022 • 1 new comment

• BUG: Possible bug with `Series.agg()`

  #46581 commented on May 27, 2022 • 1 new comment

• ENH: print location of input error when reading file

  #46956 commented on May 27, 2022 • 1 new comment

• Feature request: Protocol for converting something to a pandas DataFrame

  #30218 commented on May 27, 2022 • 1 new comment

• BUG: Timedelta.total_seconds method is returning wrong values in nanosecond intervals

  #46819 commented on May 29, 2022 • 1 new comment

• BUG: `dropna=False` not respected for groupby aggs on result of concatenated dataframes

  #46783 commented on May 29, 2022 • 1 new comment

• BUG: Different types of group keys when grouping over one or multiple columns

  #46659 commented on May 29, 2022 • 1 new comment

• BUG: cut() precision at the left end does not appear as specified (3 digits by default)

  #33912 commented on May 29, 2022 • 1 new comment

• BUG: Fix infinite recursion loop when pivot of IntervalTree is ±inf

  #46664 commented on May 27, 2022 • 1 new comment

• BUG: Series.replace with to_replace dict and value=None, nonsensical error message

  #46689 commented on May 30, 2022 • 1 new comment

• ENH: Added Index param to to_dict like in to_json #46398

  #46784 commented on May 27, 2022 • 1 new comment

• ENH: adding datetime default output formatting in Styler

  #46802 commented on May 30, 2022 • 1 new comment

• Importing pandas changes return value of sys.getsizeof?

  #46832 commented on May 27, 2022 • 1 new comment

• TST: GH32822 data types in frame manip

  #46836 commented on May 28, 2022 • 1 new comment

• PERF: Optimize read_excel nrows

  #46894 commented on May 27, 2022 • 1 new comment

• ENH: plot.scatter passes errorbar specific keyword arguments to ax.er…

  #46954 commented on May 25, 2022 • 1 new comment

• CLN: DatetimeTZBlock don't override values_for_json

  #46993 commented on May 25, 2022 • 1 new comment

• CI: Start Testing on Python 3.11

  #47032 commented on May 24, 2022 • 1 new comment

• API: DatetimeIndex.get_loc(date) partial-slice?

  #47043 commented on May 23, 2022 • 0 new comments

• BUG: Inconsistent return type for groupby-resample-count

  #46826 commented on May 26, 2022 • 0 new comments

• BUG: Construction of DataFrame works with empty list but not empty array

  #46822 commented on May 28, 2022 • 0 new comments

• BUG: Runtime warning with groupby/tail when `None` appears in group column

  #46814 commented on May 29, 2022 • 0 new comments

• BUG: algorithms.factorize moves null values when sort=False

  #46601 commented on May 28, 2022 • 0 new comments

• BUG: `DataFrameGroupBy.value_counts` includes non-observed categories of non-grouping columns

  #46798 commented on May 23, 2022 • 0 new comments

• API: New copy / view semantics using Copy-on-Write

  #46958 commented on May 25, 2022 • 0 new comments

• Stacklevel argument updated #46687

  #47035 commented on May 23, 2022 • 0 new comments

• Update mangle_dupe_cols documentation to reflect actual state of implementation

  #47046 commented on May 27, 2022 • 0 new comments

• TST: Added test for bug Reindexing pd.Float64Dtype() series gives runtime warnings when passed to np.log

  #47087 commented on May 24, 2022 • 0 new comments