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Pull requests: pandas-dev/pandas

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Pull requests list

BUG: Raise ValueError when var_name collides with id_vars in melt()
#66036 opened Jun 26, 2026 by C1-BA-B1-F3 Loading…
1
BUG: Fix to_dict(orient='index') to apply 'into' to nested mappings
#66034 opened Jun 26, 2026 by C1-BA-B1-F3 Loading…
1
BUG: Fix Memory Leak in read_csv
#66033 opened Jun 26, 2026 by Alvaro-Kothe Member Loading…
4 of 7 tasks
1
TST: DataFrame.equals array-vs-scalar object element (GH#43867) Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.). Testing pandas testing functions or related to the test suite
#66032 opened Jun 26, 2026 by jbrockmendel Member • Draft
1
[3.0.x] BUG: fix segfault adding non-tick DateOffset to datetime data under threads Build Library building on various platforms
#66031 opened Jun 26, 2026 by jbrockmendel Member Loading…
TST: groupby with multi-day Grouper and closed="right" on intraday data (GH#43896) Frequency DateOffsets Groupby Resample resample method Testing pandas testing functions or related to the test suite
#66030 opened Jun 26, 2026 by jbrockmendel Member • Draft
1
BUG: IntervalTree raises on 32-bit when n_elements > leaf_size (GH#44075) Bug cut cut, qcut Interval Interval data type
#66029 opened Jun 25, 2026 by jbrockmendel Member • Draft
2
BUG: raise in Series.combine_first with duplicate index
#66028 opened Jun 25, 2026 by C1-BA-B1-F3 Loading…
1
BUG:#22183 : Fixed Groupby Legend Labels ensuring parity with scatte…
#66027 opened Jun 25, 2026 by Saihritesh Loading…
[backport 3.0.x] Bump pypa/cibuildwheel from 3.4.1 to 4.1.0 (#65934) Build Library building on various platforms
#66026 opened Jun 25, 2026 by jorisvandenbossche Member Loading… 3.0.4
3
BUG: Fix Series.combine_first silently ignoring duplicate indices (#66009)
#66025 opened Jun 25, 2026 by krishgarg344 Loading…
1
3
TST: groupby boxplot honors column selection (GH#41124) Groupby Testing pandas testing functions or related to the test suite Visualization plotting
#66021 opened Jun 25, 2026 by jbrockmendel Member • Draft
1
TST: tz_localize nonexistent shift across UTC+0 DST boundary (GH#40705) Testing pandas testing functions or related to the test suite Timezones Timezone data dtype
#66019 opened Jun 25, 2026 by jbrockmendel Member • Draft
1
BUG: to_json(orient="table") drops fixed-offset timezone (GH#39537) Bug IO JSON read_json, to_json, json_normalize Timezones Timezone data dtype
#66016 opened Jun 25, 2026 by jbrockmendel Member • Draft
1
TST: to_string applies formatters to object-dtype float column (GH#39850) Output-Formatting __repr__ of pandas objects, to_string Testing pandas testing functions or related to the test suite
#66015 opened Jun 25, 2026 by jbrockmendel Member • Draft
1
TST: add regression test for combine_first with duplicate index (GH#66009)
#66013 opened Jun 24, 2026 by AdvenRanises Loading…
1
2
BUG: DataFrame.combine_first loses precision for wide integers (GH#60128) Bug combine/combine_first/update NDFrame.combine, combine_first, update Dtype Conversions Unexpected or buggy dtype conversions
#66011 opened Jun 24, 2026 by jbrockmendel Member • Draft
1
BUG: read_csv c engine loses float precision with thousands separator (GH#44145) Bug IO CSV read_csv, to_csv
#66010 opened Jun 24, 2026 by jbrockmendel Member • Draft
1
PERF: serialize tz-aware datetime to_json from datetime64, fix Series ISO "Z" Bug IO JSON read_json, to_json, json_normalize Performance Memory or execution speed performance Timezones Timezone data dtype
#66007 opened Jun 24, 2026 by jbrockmendel Member • Draft
BUG: DataFrame repr honors display.width with max_columns=0 (GH#21337) Bug Output-Formatting __repr__ of pandas objects, to_string Regression Functionality that used to work in a prior pandas version
#66004 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
BUG: DataFrame constructor with a list-like dataclass (GH#41682) Bug Constructors Series/DataFrame/Index/pd.array Constructors
#66003 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
BUG: DataFrame.__setitem__ silently dropping columns of a 2D value (GH#46544) Bug Indexing Related to indexing on series/frames, not to indexes themselves
#66001 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
BUG: DataFrame constructor aliases index and columns when passed the same Index (GH#42934) Bug Constructors Series/DataFrame/Index/pd.array Constructors Copy / view semantics Index Related to the Index class or subclasses
#66000 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
TST: tz-aware grouper/map returning tz-naive (GH#57192) Groupby Testing pandas testing functions or related to the test suite Timezones Timezone data dtype
#65997 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
DOC: document CSV round-trip limitation with MultiIndex columns and unnamed index (GH#56929) Docs IO CSV read_csv, to_csv
#65996 opened Jun 23, 2026 by jbrockmendel Member • Draft
1
1
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