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Issues list

BUG: inserting list of strings into Series auto-infers them as datetimes with mixed formats Bug Datetime Datetime data dtype
#61353 opened Apr 25, 2025 by MarcoGorelli
3 tasks done
BUG: 'ArrowExtensionArray' object has no attribute 'max' when passing pyarrow-backed series to .iloc Arrow pyarrow functionality Bug Indexing Related to indexing on series/frames, not to indexes themselves
#61311 opened Apr 19, 2025 by MarcoGorelli
3 tasks done
1
BUG(?): rolling sum with pyarrow types results in float64 instead of preserving integer type Arrow pyarrow functionality Bug Dtype Conversions Unexpected or buggy dtype conversions Window rolling, ewma, expanding
#61144 opened Mar 18, 2025 by MarcoGorelli
3 tasks done
3
BUG: ValueError: ndarray is not C-contiguous for cummax on nullable dtypes Bug Groupby NA - MaskedArrays Related to pd.NA and nullable extension arrays Transformations e.g. cumsum, diff, rank
#61031 opened Mar 2, 2025 by MarcoGorelli
3 tasks done
@rhshadrach
3
BUG: datetime64 can't be compared with pyarrow-backed variant Bug Datetime Datetime data dtype Numeric Operations Arithmetic, Comparison, and Logical operations
#60937 opened Feb 15, 2025 by MarcoGorelli
3 tasks done
1
@AshleySonny
6
API: pass ddof down to Cythonised std / var in groupby.agg API Design Groupby Needs Discussion Requires discussion from core team before further action
#60591 opened Dec 20, 2024 by MarcoGorelli
3
BUG: PeriodIndex.to_timestamp inconsistent with its docstring Bug Frequency DateOffsets
#59371 opened Jul 31, 2024 by MarcoGorelli
3 tasks done
3
@aram-cedarwood
2
BUG: DatetimeIndex.is_year_start breaks for business-day frequency where n is greater than 1 Bug Frequency DateOffsets
#58524 opened May 2, 2024 by MarcoGorelli
3 tasks done
1
4
BUG: itemsize wrong for date32[day][pyarrow] dtype? Arrow pyarrow functionality Bug
#57948 opened Mar 21, 2024 by MarcoGorelli
3 tasks done
@echerrin @longovin
6
DEPR: rename startingMonth to starting_month (argument in BQuarterBegin) Deprecate Functionality to remove in pandas Frequency DateOffsets
#57794 opened Mar 10, 2024 by MarcoGorelli
1
@gboeker
1
BUG: does .any(axis=1, skipna=False) follow Kleene Logic? Bug Reduction Operations sum, mean, min, max, etc.
#57171 opened Jan 31, 2024 by MarcoGorelli
3 tasks done
3
DISC: Consider not requiring PyArrow in 3.0 Needs Discussion Requires discussion from core team before further action
#57073 opened Jan 25, 2024 by MarcoGorelli
68
BUG: .loc[:, 'a'] = is inplace when assigning Series, but not DataFrame API - Consistency Internal Consistency of API/Behavior Bug Indexing Related to indexing on series/frames, not to indexes themselves inplace Relating to inplace parameter or equivalent
#56223 opened Nov 28, 2023 by MarcoGorelli
3 tasks done
1
BUG: expanding dataframe row-wise with single-element-list is no-op, but two-element-list copies Bug setitem-with-expansion
#56203 opened Nov 27, 2023 by MarcoGorelli
3 tasks done
@sleepallday
5
BUG: read_csv loses precision when engine='pyarrow' and dtype Int64 Arrow pyarrow functionality Bug IO CSV read_csv, to_csv NA - MaskedArrays Related to pd.NA and nullable extension arrays
#56136 opened Nov 23, 2023 by MarcoGorelli
3 tasks done
2
BUG: read_csv losing precision when reading Int64[pyarrow] data with N/A values Arrow pyarrow functionality Bug IO CSV read_csv, to_csv
#56135 opened Nov 23, 2023 by MarcoGorelli
3 tasks done
2
BUG: assert_series_equal raising about class difference when check_exact=True Bug Testing pandas testing functions or related to the test suite
#56132 opened Nov 23, 2023 by MarcoGorelli
3 tasks done
1
@fjangda7
2
BUG: enlarging a DataFrame by adding an extra column with a tz-aware datetime results in object dtype Bug Datetime Datetime data dtype Dtype Conversions Unexpected or buggy dtype conversions
#55423 opened Oct 6, 2023 by MarcoGorelli
3 tasks done
2
BUG: resample('MS') may introduce trailing empty windows Bug Datetime Datetime data dtype
#55284 opened Sep 25, 2023 by MarcoGorelli
3 tasks done
PDEP-6: special case (allow) upcasting to float when setting NaN in interval[integer] series API Design
#54790 opened Aug 28, 2023 by MarcoGorelli
BUG: Period can be confusingly be instantiated with lowercase freq Bug Period Period data type
#54105 opened Jul 13, 2023 by MarcoGorelli
3 tasks done
BUG: Unnecessary NonExistentTimeError when resampling weekly Bug Resample resample method
#53666 opened Jun 14, 2023 by MarcoGorelli
3 tasks done
1
@omar-elbaz
4
BUG: resample with freq W-Mon and first data point starts on Monday doesn't respect closed Bug Frequency DateOffsets Resample resample method
#53612 opened Jun 12, 2023 by MarcoGorelli
2 of 3 tasks
BUG: can't round-trip non-nano Timestamp Bug Non-Nano datetime64/timedelta64 with non-nanosecond resolution
#51060 opened Jan 30, 2023 by MarcoGorelli
3 tasks done
9
CLN remove exception catching in string_to_dts Clean
#50515 opened Dec 31, 2022 by MarcoGorelli
16
ProTip! Follow long discussions with comments:>50.