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1 Release published by 1 person
-
v2.3.1 Pandas 2.3.1
published
Jul 7, 2025
94 Pull requests merged by 36 people
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BUG: Avoid copying categorical codes if
copy=False#62000 merged
Aug 1, 2025 -
DOC: Improve documentation for DataFrame.__setitem__ and .loc assignment from Series
#61804 merged
Aug 1, 2025 -
DOC: rephrase CoW ChainedAssignmentError message now CoW is always enabled
#61970 merged
Jul 30, 2025 -
TST: Raise on
pytest.PytestWarning#61996 merged
Jul 30, 2025 -
BUG/DEPR: logical operation with bool and string
#61995 merged
Jul 29, 2025 -
BUG: groupby.agg with UDF changing pyarrow dtypes
#59601 merged
Jul 29, 2025 -
MNT: simplify
cibuildwheelconfiguration#61984 merged
Jul 28, 2025 -
Bump pypa/cibuildwheel from 2.23.3 to 3.1.1
#61981 merged
Jul 28, 2025 -
TST: add test for
dtypeargument instr.decode#61872 merged
Jul 28, 2025 -
DOC: update .str.contains/match/startswith docstring examples for default behaviour
#61960 merged
Jul 28, 2025 -
BUG: Series.replace with CoW when made from an Index
#61972 merged
Jul 28, 2025 -
BUG: Fix infer_dtype result for complex with pd.NA
#61977 merged
Jul 28, 2025 -
DOC: Update documentation for using natural sort with
sort_values#61979 merged
Jul 28, 2025 -
[backport 2.3.x] Output formatting: preserve quoting for string categories (#61891)
#61966 merged
Jul 26, 2025 -
[backport 2.3.x] BUG: fix to_json() with JSON Table Schema work correctly with string dtype (#61900)
#61965 merged
Jul 26, 2025 -
CI: enable doctest errors again + fixup categorical examples
#61947 merged
Jul 26, 2025 -
BUG: fix to_json() with JSON Table Schema work correctly with string dtype
#61900 merged
Jul 26, 2025 -
Backport PR #61958 on branch 2.3.x (DOC: Add release notes template for 2.3.2)
#61959 merged
Jul 26, 2025 -
DOC: explicitly mention new str dtype is no longer a numpy dtype in migration guide
#61921 merged
Jul 26, 2025 -
DOC: Add release notes template for 2.3.2
#61958 merged
Jul 26, 2025 -
DOC: Add tzdata to README dependencies list
#61931 merged
Jul 25, 2025 -
DOC: fix doctests for pandas/core/strings/accessor.py for new string dtype
#61908 merged
Jul 25, 2025 -
Output formatting: preserve quoting for string categories
#61891 merged
Jul 25, 2025 -
Backport PR #61933 on branch 2.3.x (unpin scipy since statsmodels was fixed)
#61934 merged
Jul 24, 2025 -
unpin scipy since statsmodels was fixed
#61933 merged
Jul 24, 2025 -
DOC: fix doctests for pandas/core/base.py for new string dtype
#61905 merged
Jul 22, 2025 -
WEB: Remove Roadmap points pending a PDEP section from Roadmap
#61892 merged
Jul 22, 2025 -
DOC: update release process maintainer guide
#61810 merged
Jul 22, 2025 -
PDEP-8: Inplace methods in pandas
#51466 merged
Jul 22, 2025 -
Update v3.0.0.rst to use Month XX, 2025 instead of 2024
#61919 merged
Jul 22, 2025 -
DOC: Clarify to_numeric behavior for numeric dtypes
#61904 merged
Jul 21, 2025 -
DEPR: maybe_infer_ndim
#61901 merged
Jul 21, 2025 -
CI: properly enable the string dtype also for custom CI builds
#61913 merged
Jul 21, 2025 -
DOC: fix doctests for pandas/core/generic.py for new string dtype
#61907 merged
Jul 21, 2025 -
DOC: fix doctests for datetimelike.py files for the new string dtype
#61911 merged
Jul 20, 2025 -
BUG: fix padding for string categories in CategoricalIndex repr
#61894 merged
Jul 19, 2025 -
BUG: If both index and axis are passed to DataFrame.drop, raise a clear error
#61855 merged
Jul 18, 2025 -
API: IncompatibleFrequency subclass TypeError
#61875 merged
Jul 18, 2025 -
BUG: disallow exotic np.datetime64 unit
#61882 merged
Jul 17, 2025 -
DOC: fix doctests for string dtype changes (top-level)
#61887 merged
Jul 17, 2025 -
DOC: make doc build run with string dtype enabled
#61864 merged
Jul 17, 2025 -
API: Index.__cmp__(Series) return NotImplemented
#61884 merged
Jul 16, 2025 -
BUG: Timedelta with invalid keyword
#61883 merged
Jul 16, 2025 -
ERR: improve exception message from timedelta64-datetime64
#61876 merged
Jul 16, 2025 -
DOC: update Parquet IO user guide on index handling and type support across engines
#61878 merged
Jul 16, 2025 -
DOC: show Parquet examples with default engine (without explicit pyarrow/fastparquet engine keyword)
#61877 merged
Jul 16, 2025 -
String dtype: turn on by default
#61722 merged
Jul 16, 2025 -
DOC: Add Raises section to to_numeric docstring
#61868 merged
Jul 16, 2025 -
API: np.isinf on Index return Index[bool]
#61874 merged
Jul 16, 2025 -
TST(string dtype): Resolve xfails in test_from_dummies
#60694 merged
Jul 15, 2025 -
Remove incorrect line in Series init docstring
#61849 merged
Jul 14, 2025 -
BUG: Fix pivot_table margins to include NaN groups when dropna=False
#61524 merged
Jul 13, 2025 -
DOC: Update README.md to reference issues related to 'good first issue' and 'Docs' properly
#61836 merged
Jul 12, 2025 -
DOC: rm excessive backtick
#61839 merged
Jul 12, 2025 -
DOC: Correct error message in AbstractMethodError for methodtype argument
#61827 merged
Jul 11, 2025 -
BUG: Fix infer_dtype result for float with embedded pd.NA
#61624 merged
Jul 11, 2025 -
TST: enable 2D tests for MaskedArrays, fix+test shift
#61826 merged
Jul 11, 2025 -
TST: Fix
test_mask_stringdtype#61830 merged
Jul 11, 2025 -
REF: separate out helpers in libparser
#61832 merged
Jul 11, 2025 -
DOC: Update link to pytz documentation
#61821 merged
Jul 11, 2025 -
BUG: Require sample weights to sum to less than 1 when replace = True
#61582 merged
Jul 11, 2025 -
BUG: Fix Index.equals between object and string
#61541 merged
Jul 10, 2025 -
TST[string]: update expecteds for using_string_dtype to fix xfails
#61727 merged
Jul 10, 2025 -
CI: Remove PyPy references in CI testing
#61814 merged
Jul 9, 2025 -
feature #49580: support new-style float_format string in to_csv
#61650 merged
Jul 8, 2025 -
DEPS: Bump NumPy and tzdata
#61806 merged
Jul 8, 2025 -
[pre-commit.ci] pre-commit autoupdate
#61802 merged
Jul 7, 2025 -
REF: remove unreachable, stronger typing in parsers.pyx
#61785 merged
Jul 7, 2025 -
Backport PR #61794 on branch 2.3.x (DOC: prepare 2.3.1 whatsnew notes for release)
#61803 merged
Jul 7, 2025 -
BUG: Decimal(NaN) incorrectly allowed in ArrowEA constructor with tim…
#61773 merged
Jul 7, 2025 -
TST: option_context bug on Mac GH#58055
#61779 merged
Jul 7, 2025 -
PERF: avoid object-dtype path in ArrowEA._explode
#61786 merged
Jul 7, 2025 -
DOC: prepare 2.3.1 whatsnew notes for release
#61794 merged
Jul 7, 2025 -
CLN: remove and udpate for outdated _item_cache
#61789 merged
Jul 7, 2025 -
DOC: Add link to WebGL in pandas ecosystem
#61790 merged
Jul 7, 2025 -
[backport 2.3.x] BUG[string]: incorrect index downcast in DataFrame.join (#61771)
#61800 merged
Jul 7, 2025 -
[backport 2.3.x] TST: update expected dtype for sum of decimals with pyarrow 21+ (#61799)
#61801 merged
Jul 7, 2025 -
TST: update expected dtype for sum of decimals with pyarrow 21+
#61799 merged
Jul 7, 2025 -
BUG[string]: incorrect index downcast in DataFrame.join
#61771 merged
Jul 7, 2025 -
Backport PR #61770 on branch 2.3.x (BUG: Fix unpickling of string dtypes of legacy pandas versions)
#61793 merged
Jul 7, 2025 -
DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes
#61795 merged
Jul 7, 2025 -
Backport PR #61705 on branch 2.3.x (DOC: add pandas 3.0 migration guide for the string dtype)
#61797 merged
Jul 7, 2025 -
DOC: add pandas 3.0 migration guide for the string dtype
#61705 merged
Jul 7, 2025 -
BUG: Fix unpickling of string dtypes of legacy pandas versions
#61770 merged
Jul 7, 2025 -
BUG: NA.__and__, __or__, __xor__ with np.bool_ objects
#61768 merged
Jul 3, 2025 -
Revert "ENH: Allow third-party packages to register IO engines"
#61767 merged
Jul 3, 2025 -
ENH: Allow third-party packages to register IO engines
#61642 merged
Jul 3, 2025 -
DEPR: object inference in to_stata
#56536 merged
Jul 3, 2025 -
[backport 2.3.x] CI: clean up wheel build workarounds now that Cython 3.1.0 is out (#61446)
#61752 merged
Jul 3, 2025 -
DEPS: bump pyarrow minimum version from 10.0 to 12.0
#61723 merged
Jul 3, 2025 -
Revert "[2.3.x] DEPS: Drop Python 3.9 (#60792)"
#61755 merged
Jul 3, 2025
43 Pull requests opened by 29 people
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ENH: speed up wide DataFrame.line plots by using a single LineCollection
#61764 opened
Jul 3, 2025 -
Improve MultiIndex label rename checks
#61769 opened
Jul 3, 2025 -
TST: assert reading of legacy pickles against current data
#61792 opened
Jul 7, 2025 -
BUG: DataFrame.aggregate to preserve extension dtypes with callable functions
#61816 opened
Jul 9, 2025 -
DOC: Clarify broadcasting behavior when using lists in DataFrame arithmetic (GH18857)
#61820 opened
Jul 9, 2025 -
BUG: Fix inconsistency with DateOffset near DST
#61870 opened
Jul 16, 2025 -
BUG FIX: None of the included dtypes present in df will raise ValueError with clear error message.
#61871 opened
Jul 16, 2025 -
DOC: Document that str.match accepts a regular expression
#61879 opened
Jul 16, 2025 -
DEPR: PeriodDtype.freq
#61897 opened
Jul 18, 2025 -
BUG: Raise ParserWarning when on_bad_lines is callable and index_col is set (GH#61882)
#61902 opened
Jul 19, 2025 -
BUG: .describe() doesn't work for EAs #61707
#61910 opened
Jul 20, 2025 -
DOC: mention .attrs are preserved in Parquet IO for pyarrow engine
#61912 opened
Jul 20, 2025 -
BUG: IntervalIndex.unique() only contains the first interval if all interval borders are negative
#61920 opened
Jul 22, 2025 -
BUG: Add min/max methods to ArrowExtensionArray GH#61311
#61924 opened
Jul 22, 2025 -
CoW: add readonly flag to ExtensionArrays, return read-only EA/ndarray in .array/EA.to_numpy()
#61925 opened
Jul 22, 2025 -
Updating error message to include more details about dataframe
#61929 opened
Jul 23, 2025 -
BUG: Fix Series.str.contains with compiled regex on Arrow string dtype (#61942)
#61946 opened
Jul 25, 2025 -
TST: run python-dev CI on 3.14-dev
#61950 opened
Jul 25, 2025 -
DOC: added button to edit on GitHub
#61956 opened
Jul 26, 2025 -
BUG: fix .str.isdigit to honor unicode superscript for older pyarrow
#61962 opened
Jul 26, 2025 -
BUG FIX: Using Series.str.fullmatch() and Series.str.match() with a compiled regex fails with arrow strings
#61964 opened
Jul 26, 2025 -
ENH: usecols takes input order for read_csv implementation review
#61967 opened
Jul 26, 2025 -
BUG: Fix Series.reindex losing values when reindexing to MultiIndex
#61969 opened
Jul 26, 2025 -
API: offsets.Day is always calendar-day
#61985 opened
Jul 28, 2025 -
Fix warning for extra fields in read_csv with on_bad_lines callable
#61987 opened
Jul 29, 2025 -
BUG: Fix ExtensionArray binary op protocol
#61990 opened
Jul 29, 2025 -
DOC: documenting pandas.MultIndex.argsort
#62005 opened
Jul 30, 2025 -
DOC: Standardize noncompliant docstrings in pandas/io/html.py (flake8-docstrings) #61944
#62007 opened
Jul 31, 2025 -
BUG FIX: pandas.arrays.IntervalArray.overlaps() incorrectly documents that it accepts IntervalArray.
#62009 opened
Jul 31, 2025 -
BUG: Fix assert_series_equal for categoricals with nulls and check_category_order=False (#62008)
#62011 opened
Jul 31, 2025 -
Fix cbusday calendar Typecheck v2
#62014 opened
Jul 31, 2025 -
DOC: Add SSLCertVerificationError warning message for documentation b…
#62015 opened
Jul 31, 2025 -
DOC: Add example for multi-column joins using `merge`
#62016 opened
Aug 1, 2025 -
BUG: Fix assert_series_equal with check_category_order=False for categoricals with nulls
#62017 opened
Aug 1, 2025 -
REF: make copy keyword in recode_for_categories keyword only
#62019 opened
Aug 1, 2025 -
BUG: Fix is_signed_integer_dtype to handle abstract floating types (GH 62018)
#62020 opened
Aug 1, 2025 -
TST: nan->NA in non-construction tests
#62021 opened
Aug 2, 2025 -
continue from #61957 which closed with unmerged commit
#62023 opened
Aug 2, 2025 -
BUG: Change default of observed in Series.groupby
#62025 opened
Aug 2, 2025 -
BUG: groupby.idxmin/idxmax with all NA values should raise
#62026 opened
Aug 2, 2025 -
BUG: Fix DataFrame reduction to preserve NaN vs <NA> in mixed dtypes (GH#62024)
#62027 opened
Aug 2, 2025
100 Issues closed by 19 people
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issubdtype(<categorical>, np.bool_) raises error
#9581 closed
Aug 2, 2025 -
API: Expand read_csv dtype for categoricals
#14503 closed
Aug 2, 2025 -
Dask shuffle performance help
#43155 closed
Aug 2, 2025 -
ENH: to_offset "year"/"quarter"/"month"/"day"/...?
#34586 closed
Aug 2, 2025 -
inf comparison doesn't emulate NaN with use_inf_as_null
#16756 closed
Aug 1, 2025 -
DOC: Improve documentation for DataFrame.__setitem__ and .loc assignment from Series
#61662 closed
Aug 1, 2025 -
BUG: Inconsistent `datetime` dtype based on how the dataframe gets initialized
#61993 closed
Jul 31, 2025 -
BUG: the behavior of DataFrameGroupBy.apply(..., include_groups=True) breaks post-mortem debugging
#61627 closed
Jul 31, 2025 -
BUG: Writing UUIDs fail
#61602 closed
Jul 31, 2025 -
DOC:
#55125 closed
Jul 30, 2025 -
BUG: Python Package fails to load for some users, but not others.
#61991 closed
Jul 30, 2025 -
BUG (string dtype): logical operation with bool and string failing
#60234 closed
Jul 29, 2025 -
PERF: `pandas.DataFrame.stack` with `future_stack=True`
#61994 closed
Jul 29, 2025 -
BUG: Groupby aggregate coersion of outputs inconsistency for pyarrow dtypes
#61636 closed
Jul 29, 2025 -
BUG: Groupby-aggregate on a boolean column returns a different datatype with pyarrow than with numpy
#53030 closed
Jul 29, 2025 -
DOC: Improve docstrings in utility functions in pandas/core/common.py (lines 176–210)
#61986 closed
Jul 29, 2025 -
BUG: CoW - eq not implemented for <class 'pandas.core.internals.blocks.ExtensionBlock'>
#61622 closed
Jul 28, 2025 -
BUG: infer_dtype returns "mixed" for complex and pd.NA mix
#61976 closed
Jul 28, 2025 -
RLS: 2.3.1
#61590 closed
Jul 28, 2025 -
DOC: code coverage app provided in documentation is invalid
#61968 closed
Jul 27, 2025 -
ENH: astype(object) does not convert numpy strings to str
#60496 closed
Jul 26, 2025 -
DOC: fix doctests for repr changes with the new string dtype
#61886 closed
Jul 26, 2025 -
BUG: make to_json with JSON Table Schema work correctly with string dtype
#61889 closed
Jul 26, 2025 -
BUG: Cannot interpret string dtype as a valid data type
#61915 closed
Jul 26, 2025 -
BUG: Replacement fails after NA value with PyArrow-backed strings
#61948 closed
Jul 25, 2025 -
DOC: Add tzdata to dependencies section in README
#61927 closed
Jul 25, 2025 -
BUG: Unexpected Code Segment Executed, Causing Logical Error
#61932 closed
Jul 24, 2025 -
BUG: In master, math with periodindex + index of offset produces wrong result
#50162 closed
Jul 23, 2025 -
ENH: read_parquet as a class method
#58303 closed
Jul 23, 2025 -
BUG: 'Engine' object has no attribute 'cursor'
#60124 closed
Jul 23, 2025 -
BUG: Pandas to_sql 'Engine' object has no attribute 'cursor'
#60684 closed
Jul 23, 2025 -
BUG: why arrow no affect in Intel chips？
#60466 closed
Jul 23, 2025 -
BUG: Cannot connect to odoo
#60800 closed
Jul 23, 2025 -
BUG: DataFrame.mul() corrupts data by setting values to zero
#61687 closed
Jul 23, 2025 -
BUG: `date_range` gives different output ends for fixed `end` and varying `start` when `freq="B"`
#61922 closed
Jul 22, 2025 -
Roadmap page has numbered-only list when should be a mix of numbered and unnumbered
#60913 closed
Jul 22, 2025 -
DEPR: ExtensionOpsMixin in favor of OpsMixin
#37080 closed
Jul 22, 2025 -
BUG:float_precision type hints differ in release version from github and docs pandas==2.3.1
#61873 closed
Jul 22, 2025 -
API/DEPR: Deprecate inplace parameter
#16529 closed
Jul 22, 2025 -
QST: Global future flag
#61918 closed
Jul 21, 2025 -
DOC: Clarify to_numeric behavior for numeric dtypes
#61903 closed
Jul 21, 2025 -
ENH: Make attributes saved by default
#61906 closed
Jul 21, 2025 -
BUG: Inconsitent behaviour for different backends due to nullable bool values
#61713 closed
Jul 19, 2025 -
BUG: `read_csv()` : inconsistent dtype and content parsing.
#61730 closed
Jul 19, 2025 -
BUG: `AttributeError` in `pd.eval()` when calling attribute after binary operation
#61898 closed
Jul 18, 2025 -
high-freq properties of low-freq Periods
#18378 closed
Jul 18, 2025 -
BUG: drop doesn't recognise MultiIndexes
#61823 closed
Jul 18, 2025 -
API: IncompatibleFrequency should subclass TypeError
#55782 closed
Jul 18, 2025 -
Timestamp incorrectly handles datetime64 with exotic units
#25611 closed
Jul 17, 2025 -
VOTE: Voting issue for PDEP-8: Inplace methods in pandas
#56507 closed
Jul 17, 2025 -
DISC: Consider not requiring PyArrow in 3.0
#57073 closed
Jul 17, 2025 -
VOTE: Voting issue for PDEP-15: Reject adding PyArrow as a required dependency
#61596 closed
Jul 17, 2025 -
API: Have invalid_comparison return pandas object following `__pandas_priority__`?
#54475 closed
Jul 16, 2025 -
DEPR: Index == Series should return NotImplemented
#36759 closed
Jul 16, 2025 -
ENH: pd.Timedelta could issue warning when 'units' falls through to **kwargs
#53801 closed
Jul 16, 2025 -
BUG: provide better error message for pd.Timedelta - pd.Series[Timestamp]
#59571 closed
Jul 16, 2025 -
DOC: Lacking information on error type raised by pd.to_numeric
#61811 closed
Jul 16, 2025 -
API: Index.__array_wrap__ stop special-casing bool dtype
#52676 closed
Jul 16, 2025 -
REF: share code between pd.array and Series constructor
#27460 closed
Jul 16, 2025 -
DISC: remove Index and EA subclasses
#43002 closed
Jul 16, 2025 -
DEPR: __finalize__ and _metadata
#51280 closed
Jul 16, 2025 -
API/DEPR: dtype=(str|bytes) interpret as pyarrow
#52429 closed
Jul 16, 2025 -
API/DEPR: pd.array don't cast numpy int/float/bool arrays to nullable
#53695 closed
Jul 16, 2025 -
DEPR: Period, PeriodFoo
#54235 closed
Jul 16, 2025 -
BUG: DTA/TDA setitem breaks freq on views
#31218 closed
Jul 16, 2025 -
Cython 3.0 Checklist
#34213 closed
Jul 16, 2025 -
BUG: ArrowStringArray.__setitem__ breaks views
#45419 closed
Jul 16, 2025 -
ENH: Extending EAs
#51471 closed
Jul 15, 2025 -
DOC: Enforce Numpy Docstring Validation | pandas.ExcelFile through pandas.HDFStore
#58067 closed
Jul 15, 2025 -
DOC: Enforce Numpy Docstring Validation | pandas.Timestamp
#58505 closed
Jul 15, 2025 -
DOC: Enforce Numpy Docstring Validation | pandas.api.types
#58577 closed
Jul 15, 2025 -
BUG: Add pyarrow strings to any_string_dtype fixture
#58495 closed
Jul 15, 2025 -
BUG: pd.eval raises AttributeError: 'BinOp' object has no attribute 'value'
#61861 closed
Jul 15, 2025 -
ENH: Python 3.13 free-threading support
#59057 closed
Jul 14, 2025 -
DOC: Series.__init__ doc incorrectly says dtype is ignored if data is a Series
#61848 closed
Jul 14, 2025 -
BUG: margin for pivot_table is incorrect with NA column/index values
#61509 closed
Jul 13, 2025 -
DOC: README.md link for issues specified for Docs and good first issue doesn't reference properly
#61835 closed
Jul 12, 2025 -
BUG: infer_dtype result for float with embedded pd.NA
#61621 closed
Jul 11, 2025 -
BUG: `mask` in `test_mask_stringdtype` would always return the same result regardless of `cond`
#61824 closed
Jul 11, 2025 -
BUG: Intersection of Pandas Index Object is not working properly
#61831 closed
Jul 11, 2025 -
BUG: DataFrame.sample weights not required to sum to less than 1
#61516 closed
Jul 11, 2025 -
ENH: allow EAs to override MergeOperation._get_join_indexers
#53696 closed
Jul 11, 2025 -
API/PERF: when to check for mismatched tzs/awareness in array_to_datetime
#55779 closed
Jul 11, 2025 -
BUG: Can only compare identically-labeled Series objects (string vs. object)
#61099 closed
Jul 10, 2025 -
BUG: read_excel() converts the string "None" in an Excel file to "NaN"
#61788 closed
Jul 8, 2025 -
ENH: support new-style float_format string in to_csv
#49580 closed
Jul 8, 2025 -
CI: Test pandas with numpy 1.26
#61588 closed
Jul 8, 2025 -
PERF: Unnecessary string interning in read_csv?
#61783 closed
Jul 8, 2025 -
DOC: https://pandas.pydata.org/pandas-docs/version/2.3 does not work
#61721 closed
Jul 8, 2025 -
ENH: Add Coefficient of Variation to DataFrame.describe()
#61784 closed
Jul 7, 2025 -
`pandas.__version__` is `2.3.0+4.g1dfc98e16a` in pandas 2.3.0 and python 3.9, not `2.3.0`
#61579 closed
Jul 7, 2025 -
API/BUG: different constructor behavior for numpy vs pyarrow dt64tzs
#61775 closed
Jul 7, 2025 -
BUG: TestTableSchemaRepr::test_publishes raises AttributeError on mac
#58055 closed
Jul 7, 2025 -
CLN: references/tests for item_cache
#61746 closed
Jul 7, 2025 -
DOC: Improve text color in dark mode for tutorial navigation buttons
#61791 closed
Jul 7, 2025 -
String dtype: overview of breaking behaviour changes
#59328 closed
Jul 7, 2025 -
BUG: StringDtype objects from pandas <2.3.0 cannot be reliably unpickled in 2.3.0.
#61763 closed
Jul 7, 2025 -
BUG: Series.mul silently returns wrong values with `UInt8` dtype when overflowing the max value range
#59261 closed
Jul 4, 2025 -
BUG: np.bool_(False) & pd.NA gives pd.NA
#58427 closed
Jul 3, 2025
58 Issues opened by 43 people
-
BUG: NaN vs NA in mixed reduction
#62024 opened
Aug 2, 2025 -
DEPR: convert_dtypes keywords
#62022 opened
Aug 2, 2025 -
BUG: pd.api.types.is_signed_integer_dtype(np.floating) throws TypeError
#62018 opened
Aug 1, 2025 -
BUG: Sql select from database type cast issue
#62013 opened
Jul 31, 2025 -
DOC: Series and DataFrame.reindex accepts Timedelta as tolerance, which is not documented
#62010 opened
Jul 31, 2025 -
BUG: `assert_series_equal` broken with `check_category_order=False` for arrays with null values
#62008 opened
Jul 31, 2025 -
BUG: `IntervalArray.overlaps()` documents that it accepts another `IntervalArray`, but it is not implemented
#62004 opened
Jul 30, 2025 -
ENH: error messages for missing performance dependencies should point out the options
#62001 opened
Jul 30, 2025 -
DOC: documenting pandas.MultIndex.argsort
#61998 opened
Jul 29, 2025 -
DOC: Point out difference in usage of "str" dtype in constructor and astype member
#61992 opened
Jul 29, 2025 -
BUG: Boolean Column Indexing Issue in Pandas
#61980 opened
Jul 28, 2025 -
BUG: 'Sphinx parallel build error' when building docs locally prevents index.html creation
#61975 opened
Jul 27, 2025 -
BUG: The lines skipped by pd.read_csv(path, chunksize=n, on_bad_lines='skip') depends on `n`.
#61973 opened
Jul 27, 2025 -
DOC: shift argument in `Series.shift()` is not used
#61955 opened
Jul 25, 2025 -
BUG: Using `Series.str.fullmatch()` and `Series.str.match()` with a compiled regex fails with arrow strings
#61952 opened
Jul 25, 2025 -
BUG: Implicit upcast to float64 for large series (more than 1000000 rows)
#61951 opened
Jul 25, 2025 -
BUG: border attribute used in html.py was deprecated in HTML5
#61949 opened
Jul 25, 2025 -
DOC: Standardize noncompliant docstrings in pandas/io/html.py (flake8-docstrings)
#61944 opened
Jul 25, 2025 -
BUG: series.groupby(level=0) and series.groupby(pd.Grouper(level=0)) produce different orders
#61943 opened
Jul 25, 2025 -
BUG: Using `Series.str.contains()` with a compiled regex and arrow strings fails
#61942 opened
Jul 24, 2025 -
BUG: Using `/` operator with a `Path` and `Series` of string dtype fails
#61940 opened
Jul 24, 2025 -
DOC: Docstring for BooleanDType inconsistent with the rest of repo
#61939 opened
Jul 24, 2025 -
BUG: `metadata` on `np.ndarray` of `np.dtype("O")` dtype lost when roundtripped through `pandas.Series`
#61938 opened
Jul 24, 2025 -
BUG: `Index` accepts lists as values
#61937 opened
Jul 24, 2025 -
PERF: `DataFrame.copy(deep=True)` returns a view on the original pyarrow buffer
#61930 opened
Jul 23, 2025 -
indexing with a `Categorical` of `Interval`s is inefficient
#61928 opened
Jul 23, 2025 -
BUG: Merge fails on pyarrow datetime columns
#61926 opened
Jul 23, 2025 -
BUG: `IntervalIndex.unique()` only contains the first interval if all interval borders are negative
#61917 opened
Jul 21, 2025 -
String dtype: backwards compatibility of selecting "object" vs "str" columns in `select_dtypes`
#61916 opened
Jul 21, 2025 -
BUG: Convertors not running when reading a dataframe from excel using calamine engine
#61914 opened
Jul 20, 2025 -
BUG: `rank` gives incorrect outputs on Windows with PyArrow backend
#61896 opened
Jul 18, 2025 -
Output formatting: the repr of the Categorical categories (quoted or unquoted strings?)
#61890 opened
Jul 17, 2025 -
ENH: Images embedded in cells. The DISPIMG function of WPS
#61888 opened
Jul 17, 2025 -
API: boolean ops with float dtype
#61881 opened
Jul 16, 2025 -
BUG: Operations not implemented for non-1D ExtensionArrays
#61866 opened
Jul 15, 2025 -
BUG: describe(include=..) fails with unrelated error if provided data types are not present
#61863 opened
Jul 15, 2025 -
BUG: DateOffset default temporal pattern does not work as expected with DST
#61862 opened
Jul 15, 2025 -
ENH: New method "ends" as a combination of “head” and "tail"
#61860 opened
Jul 15, 2025 -
BUG: Inconsistent .values NA/NaN
#61856 opened
Jul 14, 2025 -
ENH: Backport free-threading support to 2.3
#61844 opened
Jul 13, 2025 -
BUG: .rolling().mean() returns all NaNs on re-execution, despite .copy() use
#61841 opened
Jul 12, 2025 -
ENH: Include line number and number of fields when read_csv() callable raises ParserWarning
#61838 opened
Jul 12, 2025 -
BUG: read_csv() on_bad_lines callable does not raise ParserWarning when index_col is set
#61837 opened
Jul 12, 2025 -
ENH: error message context.
#61834 opened
Jul 12, 2025 -
ENH: Add a function like PYQT signal
#61829 opened
Jul 11, 2025 -
PERF: Brainstorming read_csv perf improvements
#61825 opened
Jul 10, 2025 -
BUG: Series created from pre-2.1 legacy pickles lose their names during .copy operations
#61819 opened
Jul 9, 2025 -
ENH: Add Polars engine to read_csv
#61813 opened
Jul 8, 2025 -
BUG: Dataframe.aggregate drops pyarrow backend for lambda aggregation functions
#61812 opened
Jul 8, 2025 -
BUG: Pandas Series with Xarray slow print time.
#61809 opened
Jul 8, 2025 -
BUG: union of MultiIndex throws exception for datetime and pd.Timestamp with identical values
#61807 opened
Jul 7, 2025 -
BUG: Errors using pyarrow datetime types on windows
#61782 opened
Jul 5, 2025 -
DOC: Typo within `Series.mask()` docs - alignment is done between self and cond, not cond and other
#61781 opened
Jul 4, 2025 -
BUG: tz_localize(None) with Arrow timestamp
#61780 opened
Jul 4, 2025 -
BUG?: creating Categorical from pandas Index/Series with "object" dtype infers string
#61778 opened
Jul 4, 2025 -
BUG: Calling dict(df.groupby(...)) raises TypeError: 'str' object is not callable despite valid inputs
#61772 opened
Jul 3, 2025
258 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: Added `DataFrame.nsorted` to select top ``n`` rows according to column-dependent order
#61457 commented on
Jul 29, 2025 • 12 new comments -
BUG: Raise OutOfBoundsDatetime in DataFrame.replace when value exceeds datetime64[ns] bounds (GH#61671)
#61717 commented on
Jul 14, 2025 • 10 new comments -
Implemented NumbaExecutionEngine
#61487 commented on
Jul 31, 2025 • 9 new comments -
ENH: Implement PDEP-17
#61468 commented on
Aug 2, 2025 • 8 new comments -
DOC: add sections about big new features (CoW, string dtype) to 3.0.0 whatsnew notes
#61724 commented on
Jul 15, 2025 • 6 new comments -
CI: add PyPI Trusted-Publishing “publish” job to wheels workflow (#61669)
#61718 commented on
Jul 29, 2025 • 5 new comments -
ExtensionArray.Round method and tests
#54582 commented on
Jul 8, 2025 • 4 new comments -
BUG: to_numeric fails to convert a Pyarrow Decimal series containing NA values
#61659 commented on
Jul 19, 2025 • 4 new comments -
BUG: Add fillna at the beginning of _where not to fill NA. #60729
#60772 commented on
Jul 30, 2025 • 3 new comments -
[READY] perf improvements for strftime
#51298 commented on
Jul 17, 2025 • 3 new comments -
BUG: Add PyArrow datelike type support for `map()`
#61644 commented on
Jul 14, 2025 • 3 new comments -
API: consistent NaN treatment for pyarrow dtypes
#61732 commented on
Jul 31, 2025 • 2 new comments -
ENH: support reading directory in read_csv
#61275 commented on
Aug 2, 2025 • 2 new comments -
CLN: Use dedup_names for column name mangling in Python parser (#50371)
#61670 commented on
Jul 16, 2025 • 2 new comments -
PDEP-16: Consistent missing value handling
#58988 commented on
Jul 8, 2025 • 1 new comment -
Fix void dtype handling
#61637 commented on
Jul 15, 2025 • 1 new comment -
Fix #60766:.map,.apply would convert element type for extension array
#61396 commented on
Jul 8, 2025 • 1 new comment -
Add `strict_na` keyword to the assert_.._equal methods for object dtype to help with deprecation
#58072 commented on
Jul 8, 2025 • 1 new comment -
PERF: improve StringArray.isna
#57733 commented on
Jul 8, 2025 • 1 new comment -
POC: NA-only behavior for numpy-nullable dtypes
#61708 commented on
Jul 7, 2025 • 1 new comment -
BUG: isna() does not catch np.NaN when datatype is Float64
#60106 commented on
Jul 23, 2025 • 0 new comments -
DOC/ERR: better error message on unsuccessful datetime parsing
#10720 commented on
Jul 24, 2025 • 0 new comments -
ENH: ExcelWriter append or create mode
#61634 commented on
Jul 29, 2025 • 0 new comments -
BUG: Type error supplying SQLAlchemy NVARCHAR length in to_sql()
#61660 commented on
Jul 23, 2025 • 0 new comments -
Copy-on-Write (PDEP-7) follow-up overview issue
#48998 commented on
Jul 22, 2025 • 0 new comments -
BUG: replace value failed
#61643 commented on
Jul 22, 2025 • 0 new comments -
PERF: parallelize libjoin calls
#51364 commented on
Jul 22, 2025 • 0 new comments -
ENH: Use a neutral format to have lossless interface with scipp, Astropy, Xarray
#58217 commented on
Jul 21, 2025 • 0 new comments -
BUG: DataFrame.join(other) raises InvalidIndexError if column index is CategoricalIndex
#61675 commented on
Jul 21, 2025 • 0 new comments -
BUG: in describe() result, mean is to NaN or Inf, when change float64 to float32 or float16
#48757 commented on
Jul 17, 2025 • 0 new comments -
BUILD: Installation issue on Mac with M1 Pro arm64 processor. pandas_parser.cpython-311-darwin.so is using x86_64 arch
#61566 commented on
Jul 29, 2025 • 0 new comments -
BUG: pandas.Index takes multidimensional array as input
#20285 commented on
Jul 29, 2025 • 0 new comments -
DOC: Enforce Numpy Docstring Validation (Parent Issue)
#58063 commented on
Jul 28, 2025 • 0 new comments -
ENH: Allow storing timezone-aware datetimes in a series with a datetime64 dtype
#46998 commented on
Jul 28, 2025 • 0 new comments -
API: Breaking Changes in 3.0 (without deprecations)
#44823 commented on
Jul 28, 2025 • 0 new comments -
BUG: Column of dtype Categorical in DataFrame encounters error when taking a row that includes nan in the column
#58954 commented on
Jul 28, 2025 • 0 new comments -
RLS: 3.0
#57064 commented on
Jul 28, 2025 • 0 new comments -
method `df.merge` is resetting the index
#51796 commented on
Jul 28, 2025 • 0 new comments -
DOC: floating point precision on writing/reading to csv
#13159 commented on
Jul 27, 2025 • 0 new comments -
ENH: adding .unique() to DF (or return_inverse for duplicated)
#21357 commented on
Jul 27, 2025 • 0 new comments -
BUG: `series.reindex(mi)` behaves different for series with Index and MultiIndex
#60923 commented on
Jul 26, 2025 • 0 new comments -
DOC: section on caveats of storing lists inside DataFrame/Series
#17027 commented on
Jul 26, 2025 • 0 new comments -
DOC: Simplify pandas theme footer
#51536 commented on
Jul 26, 2025 • 0 new comments -
DOC: min_itemsize for HDFStore append for encoded strings
#14601 commented on
Jul 25, 2025 • 0 new comments -
DOC: SQL-style join conditions
#57722 commented on
Jul 25, 2025 • 0 new comments -
DOC: use shared_docs for isna/notna & isnull/notnull
#17096 commented on
Jul 25, 2025 • 0 new comments -
BUG: should constructing Index from a Series make a copy?
#42934 commented on
Jul 24, 2025 • 0 new comments -
BUG: Decimal and float-to-int conversion issues with pyarrow ≥18.0.0 in parquet and Arrow dtype tests
#61464 commented on
Jul 24, 2025 • 0 new comments -
cannot get cut() to display desired bins label
#15357 commented on
Jul 17, 2025 • 0 new comments -
BUG: Incorrect behavior of binary operations when left/right operands have different type (Series/DataFrame)
#37663 commented on
Jul 17, 2025 • 0 new comments -
Deprecate fill_value argument for df.add
#32608 commented on
Jul 17, 2025 • 0 new comments -
Using python comparison operators when SparseArrays of uneven length raises uninformative error
#32119 commented on
Jul 17, 2025 • 0 new comments -
QST: Pandas describe() methods(with float16 and float32) are different
#41277 commented on
Jul 17, 2025 • 0 new comments -
BUG: some cases of binary arithmetic between string and timedelta raise TypeError
#59653 commented on
Jul 17, 2025 • 0 new comments -
BUG: Creating Index name using `names` names argument, doesn't set index name
#19082 commented on
Jul 17, 2025 • 0 new comments -
DEPR: Deprecate xlrd and pyxlsb excel engines
#56542 commented on
Jul 18, 2025 • 0 new comments -
DIS: Keywords for multi-threading capabilities
#43313 commented on
Jul 18, 2025 • 0 new comments -
ENH: the error behaviour in pandas operation should be consistent rename erros are ignore by default whereas drop erros are raise
#61681 commented on
Jul 18, 2025 • 0 new comments -
ENH: Support f-string formatting for Period objects
#48536 commented on
Jul 18, 2025 • 0 new comments -
BUG/API: preserve dtype in Index `append()`
#60159 commented on
Jul 18, 2025 • 0 new comments -
Give the merge copy parameter better documentation
#4599 commented on
Jul 18, 2025 • 0 new comments -
DEPR: restrict downstream usage of core.internals
#40226 commented on
Jul 18, 2025 • 0 new comments -
Incorrect rolling std() results on very large DataFrames
#61677 commented on
Jul 18, 2025 • 0 new comments -
ENH: access sliced dataframe from rolling.cov
#61401 commented on
Jul 18, 2025 • 0 new comments -
ENH: Switch to trusted publishing for package upload to PyPI in CI
#61669 commented on
Jul 19, 2025 • 0 new comments -
BUG: Index[Float64].insert(1, False) casts False to 0
#61709 commented on
Jul 19, 2025 • 0 new comments -
BUG: doing df.to_parquet and then reading it with pd.read_parquet causes KeyError
#61714 commented on
Jul 19, 2025 • 0 new comments -
ENH: When read_csv reports an error, include the column name and row number
#61700 commented on
Jul 20, 2025 • 0 new comments -
BUG: Test failures with 2.2.3 on Fedora Rawhide
#60589 commented on
Jul 20, 2025 • 0 new comments -
BUG: assignment fails with copy_on_write = True
#60309 commented on
Jul 20, 2025 • 0 new comments -
`suffix` parameter in `Series.shift` not used in the implementation
#54806 commented on
Jul 21, 2025 • 0 new comments -
DEPR: List of deprecations to be removed in 4.0
#56596 commented on
Jul 21, 2025 • 0 new comments -
ENH: parallelize DataFrame.corr
#40956 commented on
Jul 21, 2025 • 0 new comments -
BUG: Merge duplicates and validation failure when columns have type int64 and uint64
#61688 commented on
Jul 21, 2025 • 0 new comments -
BUG: Implicit conversion to float64 with isin()
#61676 commented on
Jul 21, 2025 • 0 new comments -
BUG: ValueError: Buffer dtype mismatch, expected 'intp_t' but got 'long long' on ARMv7 32 bit
#55305 commented on
Aug 2, 2025 • 0 new comments -
BUG: groupby.idxmin/idxmax will all NA values
#57745 commented on
Aug 2, 2025 • 0 new comments -
API/CoW: take view of underlying Block values for shallow (deep=False) copies
#58966 commented on
Jul 8, 2025 • 0 new comments -
ENH: add basic DataFrame.from_arrow class method for importing through Arrow PyCapsule interface
#59696 commented on
Jul 15, 2025 • 0 new comments -
ENH, DOC: Add JupyterLite-powered interactive examples for the `pandas` documentation
#61061 commented on
Jul 7, 2025 • 0 new comments -
ENH: Implement translations infrastructure
#61380 commented on
Jul 18, 2025 • 0 new comments -
Fix alignment in Series subtraction with MultiIndex, Index and NaN values (#60908)
#61381 commented on
Jul 27, 2025 • 0 new comments -
ENH: Implemented MultiIndex.searchsorted method ( GH14833)
#61435 commented on
Jul 20, 2025 • 0 new comments -
BUG: Raise ValueError on integer indexers containing NA; skip test for unsupported EAs(#56727)
#61465 commented on
Jul 26, 2025 • 0 new comments -
BUG: Fixed issue where rolling.kurt() calculations would be effected by values outside of scope
#61481 commented on
Jul 26, 2025 • 0 new comments -
ENH: Add `force_suffixes` boolean argument to `pd.merge`
#61498 commented on
Aug 2, 2025 • 0 new comments -
ENH: Support Plugin Accessors Via Entry Points
#61499 commented on
Jul 26, 2025 • 0 new comments -
BUG: Fix assert_frame_equal dtype handling when check_dtype=False (#61473)
#61525 commented on
Jul 4, 2025 • 0 new comments -
API: Replace na_action parameter in Series/DataFrame/Index.map by the standard skipna
#61530 commented on
Jul 25, 2025 • 0 new comments -
BUG: Fix Series.str.zfill for ArrowDtype string arrays #61485
#61533 commented on
Jul 17, 2025 • 0 new comments -
Parallelize test_sql.py - Issue #60378
#61551 commented on
Jul 10, 2025 • 0 new comments -
PDEP-18: Nullable Object Dtype
#61599 commented on
Jul 28, 2025 • 0 new comments -
DOC: Show constructor arguments for some classes in `pd.series.offsets`
#61605 commented on
Jul 4, 2025 • 0 new comments -
BUG: Fix GroupBy aggregate coersion of outputs inconsistency for pyarrow dtypes
#61640 commented on
Aug 2, 2025 • 0 new comments -
feature #58141: Consistent naming conventions for string dtype aliases
#61651 commented on
Jul 27, 2025 • 0 new comments -
BUG: Fix lost precision with common type of uint64/int64
#61679 commented on
Jul 21, 2025 • 0 new comments -
BUG/TST: added TypeError if object dtypes are detected in dataframe
#61682 commented on
Jul 7, 2025 • 0 new comments -
Raise MergeError on mismatched signed/unsigned int merge keys
#61694 commented on
Jul 26, 2025 • 0 new comments -
WEB: add note to PDEP-10 about delayed timeline for requiring pyarrow
#61706 commented on
Jul 22, 2025 • 0 new comments -
adding pandas.api.typing.aliases and docs
#61735 commented on
Jul 24, 2025 • 0 new comments -
BUG: fillna with DataFrame input should preserve dtype when possible
#61742 commented on
Jul 31, 2025 • 0 new comments -
BUG: Fix assert_frame_equal with check_dtype=False for pd.NA dtype differences (GH#61473)
#61748 commented on
Jul 22, 2025 • 0 new comments -
DOC: Reindexing behaviour of dataframe column-assignment missing
#39845 commented on
Jul 29, 2025 • 0 new comments -
Thousands separator for to_csv
#30045 commented on
Jul 29, 2025 • 0 new comments -
TRACKER: new default String dtype (pyarrow-backed, numpy NaN semantics)
#54792 commented on
Jul 29, 2025 • 0 new comments -
BUG: resampling with origin='end_day' raises ValueError: Values falls before first bin
#44957 commented on
Jul 30, 2025 • 0 new comments -
BUG: Series.str.isdigit with pyarrow dtype doesn't honor unicode superscripts
#61466 commented on
Jul 30, 2025 • 0 new comments -
BUG: CustomBusinessDay not respecting calendar
#60647 commented on
Jul 30, 2025 • 0 new comments -
FEEDBACK: PyArrow as a required dependency and PyArrow backed strings
#54466 commented on
Jul 30, 2025 • 0 new comments -
DOC: Enhance '10 minute to pandas' by providing video walkthrough to help auditory learners and improve accessibility.
#59359 commented on
Jul 30, 2025 • 0 new comments -
DOC: add button to edit on GitHub
#39859 commented on
Jul 30, 2025 • 0 new comments -
DOC: warn about apply with raw=True, if function returns Optional[int]
#61632 commented on
Jul 31, 2025 • 0 new comments -
BUG: read_sql no longer works simply with SqlAlchemy selectables and a quick fix
#35484 commented on
Jul 31, 2025 • 0 new comments -
BUG: assert_frame_equal(check_dtype=False) fails when comparing two DFs containing pd.NA that only differ in dtype (object vs Int32)
#61473 commented on
Aug 1, 2025 • 0 new comments -
BUG: Python 3.14 may not increment refcount
#61368 commented on
Aug 1, 2025 • 0 new comments -
Read_csv leaks memory when used in multiple threads
#19941 commented on
Aug 1, 2025 • 0 new comments -
ENH: convert masked arrays for Series
#20427 commented on
Aug 1, 2025 • 0 new comments -
'base' argument when resampling has no effect
#22855 commented on
Aug 1, 2025 • 0 new comments -
BUG: Read hdfs:/// is broken since 2.1.0
#58078 commented on
Aug 1, 2025 • 0 new comments -
ENH: Include `df.attrs` in `to_json` output
#51012 commented on
Aug 2, 2025 • 0 new comments -
ENH: Disallow duplicate column names everywhere by default
#53217 commented on
Aug 2, 2025 • 0 new comments -
ENH: Include df.attrs in to_csv output
#53577 commented on
Aug 2, 2025 • 0 new comments -
QST: "Dummy" is rooted in ableist language
#35724 commented on
Aug 2, 2025 • 0 new comments -
Idea: Make pd.Index.values not writable
#33001 commented on
Aug 2, 2025 • 0 new comments -
ENH: Implementing NEP 18's __array_function__
#26380 commented on
Aug 2, 2025 • 0 new comments -
ENH: Add Support for GroupBy Numeric Operations
#20060 commented on
Aug 2, 2025 • 0 new comments -
Groupby.mode() - feature request
#19254 commented on
Aug 2, 2025 • 0 new comments -
ENH: .interval accessor
#16401 commented on
Aug 2, 2025 • 0 new comments -
Add axis argument to DataFrame.corr
#35002 commented on
Aug 2, 2025 • 0 new comments -
DOC: Extra float values appear after resampling in column used by groupby
#50893 commented on
Jul 17, 2025 • 0 new comments -
BUG: read_csv() raises IndexError when dict supplied as dtype uses integer keys of same sign
#57944 commented on
Jul 15, 2025 • 0 new comments -
BUG: Categorical columns using the PyArrow backend requires 4x more memory
#58062 commented on
Jul 15, 2025 • 0 new comments -
QST: somthing weird in using groupby.rolling.apply(function)
#58061 commented on
Jul 15, 2025 • 0 new comments -
ENH: `pd.read_json` ability to skip over first line when `lines=True`
#58049 commented on
Jul 15, 2025 • 0 new comments -
BUG: PeriodIndex to DatetimeIndex fail or have wrong/no frequency
#58092 commented on
Jul 15, 2025 • 0 new comments -
BUG: read_csv file handle not closed after error
#58131 commented on
Jul 15, 2025 • 0 new comments -
BUG: Inconsistent `RollingGroupby` Behaviour
#58124 commented on
Jul 15, 2025 • 0 new comments -
Inconsistent behaviour of GroupBy for BooleanArray series
#58031 commented on
Jul 15, 2025 • 0 new comments -
ENH: consistent strftime behaviour
#58179 commented on
Jul 15, 2025 • 0 new comments -
ENH: Better error handling in `strftime`
#58178 commented on
Jul 15, 2025 • 0 new comments -
BUG: 2.2.2 pep517 build fails
#58274 commented on
Jul 15, 2025 • 0 new comments -
ENH: Allow Arrow types directly with pd.to_datetime
#58220 commented on
Jul 15, 2025 • 0 new comments -
BUG: failed to roundtrip to pyarrow Table with ArrowDtype for DictionaryArray
#58207 commented on
Jul 15, 2025 • 0 new comments -
REGR?: ExponentialMovingWindow.aggregate raises on main with np.mean
#58299 commented on
Jul 15, 2025 • 0 new comments -
BUG: Forcing an int dtype on DataFrame construction raises an odd error
#58586 commented on
Jul 15, 2025 • 0 new comments -
ADMIN: Upgrade to mailman 3
#58592 commented on
Jul 15, 2025 • 0 new comments -
BUG: Series.plot.hist segfault for timedelta64
#43941 commented on
Jul 15, 2025 • 0 new comments -
DOC: read_fwf claims to support a [str] in the first argument
#55790 commented on
Jul 15, 2025 • 0 new comments -
BUG: DateOffset with non-integer days is not working anymore
#55909 commented on
Jul 15, 2025 • 0 new comments -
BUG: inconsistency in freq of DatetimeIndex when converting PeriodIndex.to_timestamp
#56213 commented on
Jul 15, 2025 • 0 new comments -
BUG: Inconsistent data type inference in `read_csv` for large CSV files with mixed data types
#56480 commented on
Jul 15, 2025 • 0 new comments -
QST: Questions about HDF5 support of pandas
#56560 commented on
Jul 15, 2025 • 0 new comments -
BUG: `SeriesGroupBy.plot` does not respect `cmap` parameter
#56697 commented on
Jul 15, 2025 • 0 new comments -
ENH: Need new semantics for selecting parquet engine in Pandas 3
#56642 commented on
Jul 15, 2025 • 0 new comments -
ENH: background_gradient accepts a normalization parameter
#56756 commented on
Jul 15, 2025 • 0 new comments -
BUG: Unexpected read_csv parse_dates behavior
#57512 commented on
Jul 15, 2025 • 0 new comments -
BUG: .str.replace repl string incorrectly parsed with pyarrow string dtype
#57636 commented on
Jul 15, 2025 • 0 new comments -
BUG: Boxplot does not apply colors set by Matplotlib rcParams for certain plot elements
#57709 commented on
Jul 15, 2025 • 0 new comments -
BUG: to_sql fails for Oracle BLOB columns
#57660 commented on
Jul 15, 2025 • 0 new comments -
BUG: Setting a numpy array as a column in Pandas uses only the first column of the array.
#57765 commented on
Jul 15, 2025 • 0 new comments -
BUG: to_parquet on column containing StringArray objects fails
#57773 commented on
Jul 15, 2025 • 0 new comments -
ENH: rolling window, make the very first window have the first element of my series on its left
#57873 commented on
Jul 15, 2025 • 0 new comments -
PERF: Arrow dtypes are much slower than Numpy for DataFrame.apply
#61747 commented on
Jul 13, 2025 • 0 new comments -
BUG: pd.DataFrame.mul has not support fill_value?
#61581 commented on
Jul 13, 2025 • 0 new comments -
DOC: v2.2 offline documentation search button not work
#60308 commented on
Jul 11, 2025 • 0 new comments -
With an external grouper, there is no way to access the grouped value in a DataFrame(...).groupby(...).apply(...) workflow
#9545 commented on
Jul 11, 2025 • 0 new comments -
BUG: numpy_nullable NaNs do not round-trip through CSV
#61617 commented on
Jul 10, 2025 • 0 new comments -
DOC: improve docs for broadcasting behavior
#18857 commented on
Jul 9, 2025 • 0 new comments -
BUG: If you add _metadata to a custom subclass of Series, the sequence name is lost when indexing
#61491 commented on
Jul 8, 2025 • 0 new comments -
REF: dtype_backend argument in sql module mixes lib.no_default and numpy
#60326 commented on
Jul 8, 2025 • 0 new comments -
WEB: Multiple "Getting Started" on pandas.io leads to different links
#32307 commented on
Jul 8, 2025 • 0 new comments -
BUG: ``'ArrowExtensionArray' object has no attribute 'max'`` when passing pyarrow-backed series to `.iloc`
#61311 commented on
Jul 8, 2025 • 0 new comments -
TST: Disallow bare tm.assert_produces_warning
#58290 commented on
Jul 8, 2025 • 0 new comments -
BUG: Large XML files on Windows trigger false Encoding error
#59447 commented on
Jul 6, 2025 • 0 new comments -
ENH: read_xml() does not allow to specify huge_tree=True for the 'lxml' parser.
#61290 commented on
Jul 6, 2025 • 0 new comments -
BUG: pyarrow stripping leading zeros with dtype=str
#57666 commented on
Jul 4, 2025 • 0 new comments -
Request for guidance on issues for upcoming PyData Yerevan pandas sprint
#61347 commented on
Jul 4, 2025 • 0 new comments -
BUG: "Python int too large" in maybe_convert_objects with numpy 1.26
#60023 commented on
Jul 3, 2025 • 0 new comments -
BUG: pandas read_xml with iterparse and stylesheets silently ignores stylesheets
#58857 commented on
Jul 15, 2025 • 0 new comments -
BUG: numerical inconsistency in calculating rolling kurtosis
#58711 commented on
Jul 15, 2025 • 0 new comments -
ENH: Pipe `attrs` to_html Jinja2 environmental variables
#59193 commented on
Jul 15, 2025 • 0 new comments -
BUG: regression in master for DataFrame.sparse.from_spmatrix
#59212 commented on
Jul 15, 2025 • 0 new comments -
BUG: subtracting datetime series from datetime dataframe, or datetime dataframe from datetime series, raises TypeError or UFuncTypeError
#59529 commented on
Jul 15, 2025 • 0 new comments -
ENH: RST support
#60616 commented on
Jul 15, 2025 • 0 new comments -
BUG: why arrow only work on mac arm？
#60714 commented on
Jul 15, 2025 • 0 new comments -
ENH: Implement `skiptrailingspace` parameter for `read_csv`
#60813 commented on
Jul 15, 2025 • 0 new comments -
BUG: setting column with 2D object array raises
#61026 commented on
Jul 15, 2025 • 0 new comments -
ENH: Add ignore_empty and ignore_all_na arguments to pd.concat
#61210 commented on
Jul 15, 2025 • 0 new comments -
ENH: Add read_dbf method
#61306 commented on
Jul 15, 2025 • 0 new comments -
BUG: inconsistent treatment of overflows between groupby.sum() and groupby.apply(lambda: _grp: _grp.sum()) and DataFrame.resample
#60303 commented on
Jul 15, 2025 • 0 new comments -
ENH: Support attrs in feather files
#60675 commented on
Jul 14, 2025 • 0 new comments -
"drop" fails by default when label to drop is not in the index, but "rename" silently passes by. Wouldn't it make sense to synchronize?
#40427 commented on
Jul 14, 2025 • 0 new comments -
Updating value of a single row of a column using loc or at fails
#22040 commented on
Jul 13, 2025 • 0 new comments -
BUG: .round causes TypeError / NaN-
#61712 commented on
Jul 13, 2025 • 0 new comments -
BUG: AttributeError about dateutil.relativedelta when calling pd.read_json(json_data)
#59227 commented on
Jul 16, 2025 • 0 new comments -
BUG: pd.read_sql is incorrectly reading long int when connecting to Teradata
#61667 commented on
Jul 16, 2025 • 0 new comments -
BUG: user expected pd.isna to be False for NaNs with Float64Dtype
#61758 commented on
Jul 16, 2025 • 0 new comments -
API: Categorical constructor with dtype raise instead of casting to NA
#40996 commented on
Jul 16, 2025 • 0 new comments -
BUG: pd.Grouper cannot be reused in some cases
#41930 commented on
Jul 16, 2025 • 0 new comments -
ENH: PyPy Support
#42509 commented on
Jul 16, 2025 • 0 new comments -
Removal of members from pandas-triage team
#61734 commented on
Jul 15, 2025 • 0 new comments -
BUG: incorrect handling of line breaks in OdsWriter
#55728 commented on
Jul 15, 2025 • 0 new comments -
Calling pd.PeriodIndex constructor on pd.Index cannot infer frequency, while first calling pd.DateTimeIndex on pd.Index and calling .to_period() does work
#54869 commented on
Jul 15, 2025 • 0 new comments -
ENH: Inform on row & column of failed type conversion when parsing CSV files
#53966 commented on
Jul 15, 2025 • 0 new comments -
BUG: Compatibility Issues of Numpy Methods with pd.NA in Styler.bar
#56425 commented on
Jul 15, 2025 • 0 new comments -
DOC: Fix docstring validation errors for pandas.core.groupby
#60365 commented on
Jul 15, 2025 • 0 new comments -
Writing data to mysql database using df.to_sql method gives exception
#61711 commented on
Jul 15, 2025 • 0 new comments -
ENH: access arrow-backed map as a python dictionary
#61427 commented on
Jul 15, 2025 • 0 new comments -
ENH: Adding pd.from_pydantic
#61513 commented on
Jul 15, 2025 • 0 new comments -
ENH: Adding hint to to_sql
#61370 commented on
Jul 15, 2025 • 0 new comments -
Add parameter of bias or ddof to DataFrame.skew()
#54556 commented on
Jul 17, 2025 • 0 new comments -
BUG: Inconsistent data types of `Series.min()` return values by python interpreters
#55566 commented on
Jul 17, 2025 • 0 new comments -
BUG: Timedelta created by to_timedelta does not add correctly to datetime in Pandas 2
#53643 commented on
Jul 17, 2025 • 0 new comments -
BUG: `to_numeric` fails to convert a Pyarrow Decimal series containing NA values.
#61641 commented on
Jul 17, 2025 • 0 new comments -
ENH: Add decimal parameter to to_numeric
#4674 commented on
Jul 17, 2025 • 0 new comments -
ENH: cumcount() for DataFrames and Series
#12648 commented on
Jul 17, 2025 • 0 new comments -
BUG: `Series.interpolate` does not interpolate `pd.NA`
#54400 commented on
Jul 17, 2025 • 0 new comments -
ENH: .ewm add min() max() and count()
#51706 commented on
Jul 16, 2025 • 0 new comments -
ERR: Remove __invert__ operations on dtype=object?
#16873 commented on
Jul 16, 2025 • 0 new comments -
BUG: Rolling variance is negative
#52407 commented on
Jul 16, 2025 • 0 new comments -
BUG: Multindex difference not working on columns with type Timestamp[ns][pyarrow]
#61382 commented on
Jul 16, 2025 • 0 new comments -
Deprecate accepting None in pd.concat
#57846 commented on
Jul 16, 2025 • 0 new comments -
BUG: Dataframe's `to_sql` method fails while trying to persist Dataframe to Postgtres in Version 2.2.0
#57196 commented on
Jul 16, 2025 • 0 new comments -
BUG: datetime parsing: error message indicating position of conflicting string is wrong for larger data
#55345 commented on
Jul 16, 2025 • 0 new comments -
BUG: next_workday observance wrongly adds BDay to holidays on weekdays
#58553 commented on
Jul 16, 2025 • 0 new comments -
BUG: `pd.Arrays.SparseArray` warning inconsistencies when contained in a `pd.DataFrame` (potential false positive)
#58582 commented on
Jul 16, 2025 • 0 new comments -
BUG: Using DateOffset with shift on a daylight savings transition produces error
#57837 commented on
Jul 15, 2025 • 0 new comments -
BUG: timedelta.round fails to round to nearest day
#57781 commented on
Jul 15, 2025 • 0 new comments -
BUG: read_csv() returns column indices, created as integers, as strings rather than integers
#56380 commented on
Jul 15, 2025 • 0 new comments -
QST: Using a chunksize iterator with StataWriter for very large queries
#55881 commented on
Jul 15, 2025 • 0 new comments -
ENH: do not write noninformative indices (like RangeIndex) by default in to_csv
#56129 commented on
Jul 15, 2025 • 0 new comments -
DOC: Note multiset-like behaviour of `Index.union` for indexes with duplicates
#56137 commented on
Jul 15, 2025 • 0 new comments -
BUG: calendar day date_range AmbiguousTimeError with unambiguous DST boundaries
#56240 commented on
Jul 15, 2025 • 0 new comments -
BUG: DatetimeIndex.round needs ambiguous='infer', although nothing ambiguous is in the index
#55864 commented on
Jul 15, 2025 • 0 new comments -
BUG: Unable to create PeriodIndex with freq of QuarterEnd with startingMonth != 12
#55784 commented on
Jul 15, 2025 • 0 new comments -
DOC: na_values defaults for read_csv don't match STR_NA_VALUES correctly
#55803 commented on
Jul 15, 2025 • 0 new comments -
BUG: infer_freq has stateful behavior
#55794 commented on
Jul 15, 2025 • 0 new comments -
BUG: Nullable Float64Dtype incorrectly converting NaN to NA when constructed with Arrow array
#55668 commented on
Jul 15, 2025 • 0 new comments -
ENH: Extending the `orient="table"` option to all Table Schema types
#55038 commented on
Jul 15, 2025 • 0 new comments -
ENH: Auto-detect text encoding to avoid UnicodeDecodeErrors
#55197 commented on
Jul 15, 2025 • 0 new comments -
BUG: roll_std compute different result when input same data with diffrent length
#55343 commented on
Jul 15, 2025 • 0 new comments -
BUG: xticks in bar plot breaks plot
#55508 commented on
Jul 15, 2025 • 0 new comments -
BUG: to_sql does gives incorrect column name for index when callable passed in to method
#59112 commented on
Jul 15, 2025 • 0 new comments -
BUG: Difference between calamine and openpyxl readers - columns with mixed data types
#59186 commented on
Jul 15, 2025 • 0 new comments -
BUG: SQL connection
#59224 commented on
Jul 15, 2025 • 0 new comments -
ENH: Add table prefixes to to_sql method
#60422 commented on
Jul 15, 2025 • 0 new comments -
ENH: pd.to_sql(upsert=True, upsert_on_columns=['game_id'])
#60434 commented on
Jul 15, 2025 • 0 new comments -
BUG: to_sql does not populate index column with a value when using the mssql+pyodbc engine
#59111 commented on
Jul 15, 2025 • 0 new comments -
BUG: groupby.first() with None values fills None value with next row
#58611 commented on
Jul 15, 2025 • 0 new comments -
ENH: Introduce type-safe constructors for `Timestamp` and `Timedelta`.
#58475 commented on
Jul 15, 2025 • 0 new comments -
BUG: inconsistency in the behaviour of `DatetimeIndex.is_year_start` on the frequency "BYS"
#58920 commented on
Jul 15, 2025 • 0 new comments -
BUG: AssertionError when multiplying timedelta Series with a pandas nullable dtype Series
#58054 commented on
Jul 15, 2025 • 0 new comments -
BUG: Using `Series.diff()` on a Series with Periods on Windows shows an overflow error
#58320 commented on
Jul 15, 2025 • 0 new comments -
BUG: pandas.Grouper should not accept args and kwargs and should have permanent arguments
#58388 commented on
Jul 15, 2025 • 0 new comments -
ENH: `FY5253Quarter` to support alternative week allocations
#58272 commented on
Jul 15, 2025 • 0 new comments -
BUG: Error tokenizing data. C error: Expected 1 fields in line 3, saw 2
#58216 commented on
Jul 15, 2025 • 0 new comments -
BUG: Losing information when handling of `NoneType`s in `pd.json_normalize`
#58395 commented on
Jul 15, 2025 • 0 new comments -
BUG: Unable to use CustomBusinessDays in a MultiIndex
#57949 commented on
Jul 15, 2025 • 0 new comments