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Issues list

Mypy complains about inconsistent MRO when using isinstance() on a generic Series object mypy bug Requires mypy to fix a bug
#269 opened Sep 5, 2022 by tmke8
16
type annotation for Index/MultiIndex.names is incorrect Blocked Requires external dependency before progressing good first issue Index Related to the Index class or subclasses
#804 opened Oct 26, 2023 by tswast
1
11
TypeIs annotation for pands.isna is not quite accurate
#1009 opened Sep 26, 2024 by steve-mavens
10
Version 2.0 Compatibility Tracker
#624 opened Apr 3, 2023 by Dr-Irv 100+
6
10
DataFrame with generic type
#295 opened Sep 12, 2022 by ramonhagenaars
10
Type of "apply" is partially unknown
#952 opened Jun 29, 2024 by JanEricNitschke
6
Addition of a Series[int] with a complex returns Series[unknown] good first issue Series Series data structure
#1098 opened Jan 14, 2025 by loicdiridollou
5
Should Series[Any] be used internally instead of Series?
#1133 opened Feb 28, 2025 by MarcoGorelli
1
4
pd.Series gets converted to pd.TimestampSeries after isinstance check mypy bug Requires mypy to fix a bug
#877 opened Feb 24, 2024 by tvdboom
4
Type checking with converters= on read_excel good first issue IO Excel read_excel, to_excel
#849 opened Jan 11, 2024 by oliverbeagley-pgg
4
Public pandas API and pandas-stubs
#161 opened Jul 22, 2022 by twoertwein
4
Improve handling of deprecations in stubs
#870 opened Feb 14, 2024 by Daverball
3
ENH: Add Optional Schema Definitions to Enable IDE Autocompletion Enhancement
#1190 opened Apr 17, 2025 by YoniChechik
2
s.diff reports Series[object] instead of bool for nullable types
#1150 opened Mar 7, 2025 by MarcoGorelli
2
s.str.upper doesn't preserve s type
#1149 opened Mar 7, 2025 by MarcoGorelli
2
Row-wise mapping to custom type not supported in DataFrame.apply
#1001 opened Sep 13, 2024 by bluenote10
2
DataFrame.to_dict(orient="index") should return a nested dictionary
#799 opened Oct 18, 2023 by gandhis1
2
question: how to type compatibility-only args / kwargs?
#1168 opened Mar 13, 2025 by MarcoGorelli
1
Series.diff returns Series['float'] even for nullable integers NA - MaskedArrays Related to pd.NA and nullable extension arrays
#1110 opened Feb 8, 2025 by MarcoGorelli
1
Invalid index type when extracting values from a multi-index data frame Indexing Related to indexing on series/frames, not to indexes themselves
#1018 opened Oct 21, 2024 by kubotty
1
result of itertuples gives an error when passed to NamedTuple - incompatible type "_PandasNamedTuple"; expected "NamedTuple"
#881 opened Feb 27, 2024 by roj516
1
CLEAN: Investigate whether TimestampSeries, TimedeltaSeries, etc. can be removed
#718 opened May 29, 2023 by Dr-Irv
1
DOC: documentation related to how we want this to evolve, standards, testing mechanism, etc. Code Style Code style, linting, code_checks Docs Master Tracker High level tracker for similar issues Testing pandas testing functions or related to the test suite
#11 opened May 11, 2022 by simonjayhawkins
1
DataFrame.sample argument 'axis' should accept any Axis
#1251 opened Jun 16, 2025 by nithinmanne
1
MultiIndex.from_product() should accept Index or Series as arguments good first issue MultiIndex
#1249 opened Jun 13, 2025 by Dr-Irv
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