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Pull requests: pandas-dev/pandas
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BUG: fix formatting of empty frozenset in object Series
#66210
opened Jul 8, 2026 by
muhamedfazalps
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BUG: Fix resampling with CustomBusinessDay/BusinessDay and closed='right'
#66209
opened Jul 8, 2026 by
Hasnaathussain
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PERF: Vectorize string column validity mask and offsets calculations in Interchange Protocol
#66208
opened Jul 8, 2026 by
rajat315315
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6 of 7 tasks
PERF: Optimize stack frame inspection find_stack_level
#66206
opened Jul 8, 2026 by
rajat315315
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6 of 7 tasks
PERF: High overhead in DataFrame.apply(raw=True) due to np.apply_along_axis
#66204
opened Jul 7, 2026 by
rajat315315
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7 of 8 tasks
BUG: precise_xstrtod no longer loses digits for leading-zero numbers
#66201
opened Jul 7, 2026 by
ShashwatAgrawal20
Contributor
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4 of 5 tasks
BUG: Correct Formating of empty
frozenset in object Series
#66200
opened Jul 7, 2026 by
Johnhi19
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6 tasks done
PERF: Optimize string column serialization in interchange protocol
#66198
opened Jul 7, 2026 by
rajat315315
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6 of 7 tasks
DOC: Clarify forward-looking rolling window behavior with offset stri…
#66191
opened Jul 7, 2026 by
jhkr1
Contributor
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4 of 7 tasks
DOC: Add default namespace xpath example to read_xml (#63668)
#66190
opened Jul 7, 2026 by
jhkr1
Contributor
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4 of 7 tasks
BUG: cast_from_unit_vectorized near-bounds float overflow (GH#57366)
Bug
Datetime
Datetime data dtype
Timedelta
Timedelta data type
Timestamp
pd.Timestamp and associated methods
#66185
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: groupby quantile with non-null NaN and all-NaT groups (GH#64330)
Bug
Groupby
Missing-data
np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
#66183
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: repr with 0-d ndarray in object column raises (GH#64638)
Bug
Output-Formatting
__repr__ of pandas objects, to_string
#66182
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: Series/DataFrame constructor to honor unit of timedelta64 dtype for float input (GH#63499)
Bug
Timedelta
Timedelta data type
#66180
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: IntervalArray hashing nondeterministic across processes (GH#64605)
Bug
Interval
Interval data type
#66179
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: date_range with end + periods and off-offset end returns invalid result (GH#65011)
Bug
Frequency
DateOffsets
#66176
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: SparseArray.astype to int silently dropped NaT fill via Series.astype (GH#49631)
Astype
Bug
Sparse
Sparse Data Type
#66175
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: DatetimeIndex/TimedeltaIndex constructor pins a non-conforming freq (GH#65012)
Bug
Constructors
Series/DataFrame/Index/pd.array Constructors
Datetime
Datetime data dtype
Frequency
DateOffsets
Timedelta
Timedelta data type
#66174
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: DataFrame.agg with list of funcs mishandles non-reduction methods (GH#65031)
Apply
Apply, Aggregate, Transform, Map
Bug
#66173
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: unstack placed values under wrong labels for unsorted-codes MultiIndex (GH#65107)
Bug
Reshaping
Concat, Merge/Join, Stack/Unstack, Explode
#66172
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: union(sort=False) retained freq on non-monotonic datetimelike result (GH#65191)
Bug
Frequency
DateOffsets
Index
Related to the Index class or subclasses
setops
union, intersection, difference, symmetric_difference
#66171
opened Jul 6, 2026 by
jbrockmendel
Member
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BUG: pivot_table margins corrupts distinct parameterized EA dtype values (GH#55484)
Bug
Reshaping
Concat, Merge/Join, Stack/Unstack, Explode
#66167
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: DataFrame.loc setitem-with-expansion writes dict keys instead of aligned values (GH#42099)
Bug
Indexing
Related to indexing on series/frames, not to indexes themselves
#66166
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
BUG: date_range/bdate_range with periods drops entries for sparse CustomBusinessDay (GH#65604)
Bug
Frequency
DateOffsets
#66164
opened Jul 6, 2026 by
jbrockmendel
Member
•
Draft
4 tasks done
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