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Pull requests: pandas-dev/pandas
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BUG: fix read_parquet failing with TimedeltaIndex column (#59692)
#65117
opened Apr 8, 2026 by
tianlangqin
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6 of 7 tasks
Add warning when DataFrame.update has no matching indices due to dtyp…
#65116
opened Apr 8, 2026 by
cherryc0117
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BUG: .dt.seconds Discrepancy Between NumPy and PyArrow Timedelta Dtypes
#65115
opened Apr 8, 2026 by
kjmin622
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5 of 7 tasks
DOC: Add practical example for removing duplicate rows
#65114
opened Apr 7, 2026 by
Adeyinka1
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BUG: add
_str_getitem to ArrowStringArrayMixin
#65113
opened Apr 7, 2026 by
tehunter
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6 tasks done
ENH: Add recursive parameter to StructAccessor.explode()
#65111
opened Apr 7, 2026 by
ideepakchauhan7
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PERF: make mask optional in BaseMaskedArray
Performance
Memory or execution speed performance
#65106
opened Apr 6, 2026 by
jbrockmendel
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Draft
5 tasks done
PERF: avoid transpose for axis=1 reductions on multi-block DataFrames
Performance
Memory or execution speed performance
#65105
opened Apr 6, 2026 by
jbrockmendel
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Draft
3 tasks done
PERF: use PyArrow compute for month_name/day_name with string dtype
Performance
Memory or execution speed performance
#65104
opened Apr 6, 2026 by
jbrockmendel
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2 tasks done
PERF: use ufunc.reduceat for sorted groupby aggregations
Performance
Memory or execution speed performance
#65103
opened Apr 6, 2026 by
jbrockmendel
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Draft
3 tasks done
BUG: Fix merge not upcasting datetime64 join key to highest resolution for inner/left joins
#65102
opened Apr 6, 2026 by
deniskrds
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6 of 7 tasks
ENH: Add union_categories parameter to pd.concat
Enhancement
#65098
opened Apr 6, 2026 by
jbrockmendel
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Draft
6 tasks done
4
PERF: Speed up DataFrame.apply(axis=1) for ExtensionDtype columns
Performance
Memory or execution speed performance
#65097
opened Apr 6, 2026 by
jbrockmendel
•
Draft
3 tasks done
BUG: fix PeriodIndex resample aggregation for superperiod and same-frequency cases
Bug
#65096
opened Apr 6, 2026 by
jbrockmendel
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Draft
4 tasks done
PERF: remove redundant per-column casting loop in _append_internal
Performance
Memory or execution speed performance
#65094
opened Apr 6, 2026 by
jbrockmendel
•
Draft
PERF: use array indexing instead of hash lookup in recode_for_groupby
Performance
Memory or execution speed performance
#65093
opened Apr 6, 2026 by
jbrockmendel
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Draft
3 tasks done
PERF: speed up partial key indexing on MultiIndex Series
Performance
Memory or execution speed performance
#65092
opened Apr 6, 2026 by
jbrockmendel
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Draft
6 tasks done
PERF: fast-path factorization for monotonic groupby keys
Performance
Memory or execution speed performance
#65091
opened Apr 6, 2026 by
jbrockmendel
•
Draft
2 of 3 tasks
Refactor source file inspection logic in conf.py
#65083
opened Apr 5, 2026 by
poojitha-sys281
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DOC: Fix incorrect source link for DataFrame due to __module__ override
#65082
opened Apr 5, 2026 by
poojitha-sys281
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DOC: clarify bool vs int behavior in factorize docstring
#65078
opened Apr 5, 2026 by
lavanyamahesh675-collab
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1 of 7 tasks
DOC: Fix dark mode text color in tutorial data callout sections
#65076
opened Apr 4, 2026 by
MehtabSandhu11
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2 of 6 tasks
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