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Pull requests: pandas-dev/pandas

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Pull requests list

BUG: DataFrame.eval inconsistently handles duplicated columns
#65656 opened May 16, 2026 by kjmin622 Contributor Loading…
6 of 7 tasks
1
BUG: fix silent DataFrame.melt corruption on var_name collisions
#65655 opened May 15, 2026 by gautamvarmadatla Contributor Loading…
6 of 7 tasks
1
CLN: Reduce and cleanup benchmarks/algorithms Benchmark Performance (ASV) benchmarks Clean
#65651 opened May 15, 2026 by rhshadrach Member Loading…
PERF: Improve performance of groupby.size Groupby Performance Memory or execution speed performance
#65648 opened May 15, 2026 by rhshadrach Member Loading…
1 task done
1
TST: Add test for writing UUIDs to parquet with pyarrow #61602
#65647 opened May 15, 2026 by GiTaDi-CrEaTe Loading…
1
9
DOC: fix iloc column swap example in indexing guide (bounty #65446)
#65646 opened May 15, 2026 by bomlinux92-byte Loading…
1
DOC: document column attrs with Copy-on-Write
#65645 opened May 15, 2026 by MukundaKatta Loading…
1
1
Feature/groupby 62414
#65644 opened May 14, 2026 by richacode007-byte Loading…
1
DOC: clarify scalar vs list-like return types for .loc and [] Docs
#65642 opened May 14, 2026 by jbrockmendel Member Loading…
2 tasks done
1
2
DOC: clarify column-wise NA-skipping behavior of GroupBy.first/last
#65640 opened May 14, 2026 by jbrockmendel Member Loading…
2 tasks done
1
DOC: clarify pandas.unique return type
#65638 opened May 14, 2026 by jbrockmendel Member Loading…
2 tasks done
1
DOC: spell out low_memory split-value hazard in read_csv/read_table
#65636 opened May 14, 2026 by jbrockmendel Member Loading…
1 task done
1
DOC: add Interval scalar walkthrough to user guide
#65635 opened May 14, 2026 by jbrockmendel Member Loading…
2 of 3 tasks
1
DOC: document default axis=0 on DataFrame reductions
#65634 opened May 14, 2026 by jbrockmendel Member Loading…
2 tasks done
1
PERF: Cythonize kendall correlation
#65632 opened May 13, 2026 by Alvaro-Kothe Member Loading…
6 of 7 tasks
1
TYP: enable mypy checks for low-hanging _libs stubs
#65629 opened May 13, 2026 by jbrockmendel Member Loading…
4 tasks done
DOC: clarify Timedelta unit behavior in arithmetic
#65626 opened May 13, 2026 by Parth-Dholariya Loading…
1
BUG: Fixes #62775 - DataFrame.from_dict() drops empty rows with orient='index'
#65615 opened May 12, 2026 by J281417 Loading…
3 of 7 tasks
1
4
PERF: speed up HDF5 read/append/select_as_multiple
#65607 opened May 11, 2026 by jbrockmendel Member Loading…
3 tasks done
3
BUG: HDF5 pandas_version attr now reflects actual pandas version (GH-62792)
#65606 opened May 11, 2026 by jbrockmendel Member Loading…
3 of 5 tasks
1
BUG: bdate_range(end, periods, freq=nB) anchors stride at buffer start Bug
#65604 opened May 11, 2026 by jbrockmendel Member • Draft
4 tasks done
3.1
1
BUG: read_hdf converting literal 'nan' string in Index to NaN (GH-9604)
#65603 opened May 11, 2026 by jbrockmendel Member Loading…
3 tasks done
1
BUG: clearer HDFStore error for min_itemsize on MultiIndex columns (GH-12154)
#65602 opened May 11, 2026 by jbrockmendel Member Loading…
2 tasks done
1
BUG: RangeIndex.nbytes/memory_usage raised TypeError on PyPy (GH-46176)
#65601 opened May 11, 2026 by jbrockmendel Member Loading…
6 tasks done
1
PERF: bypass factorize in axis=1 EA reduction fastpath (GH-56903) Performance Memory or execution speed performance
#65597 opened May 11, 2026 by jbrockmendel Member Loading…
7 tasks done
1
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