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Pull requests: pandas-dev/pandas
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PERF: speed up bdate_range and date_range with business day frequencies
#64648
opened Mar 17, 2026 by
jbrockmendel
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7 tasks done
DEPR: DatetimeIndex dayfirst, yearfirst, ambiguous keywords
#64647
opened Mar 17, 2026 by
jbrockmendel
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4 tasks done
PERF: avoid hash table in Index.get_indexer for large monotonic indexes
#64646
opened Mar 17, 2026 by
jbrockmendel
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4 tasks done
DEPR: deprecate parsing quarterly strings in Timestamp, to_datetime, DatetimeIndex
#64645
opened Mar 17, 2026 by
jbrockmendel
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4 tasks done
BUG: fix float-to-int64 OOB handling on ARM in to_datetime/to_timedelta
#64643
opened Mar 16, 2026 by
jbrockmendel
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4 of 5 tasks
PERF/DEP: from_records 2D ndarray optimization and deprecate dict/2D ndarray input
#64642
opened Mar 16, 2026 by
jbrockmendel
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5 tasks done
PERF: use StringHashTable for StringArray.value_counts and .duplicated
#64641
opened Mar 16, 2026 by
jbrockmendel
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7 tasks done
DEPR: Deprecate xlrd and pyxlsb Excel engines in favor of calamine
Deprecate
Functionality to remove in pandas
IO Excel
read_excel, to_excel
BUG: distinguish bool from int in object-dtype hash table
#64639
opened Mar 16, 2026 by
jbrockmendel
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1 of 5 tasks
PERF: fix slow repr for Series/DataFrame with third-party array-like objects
#64638
opened Mar 16, 2026 by
jbrockmendel
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3 tasks done
fix: BUG: constructing string ArrowExtensionArray with NaNs fails
#64637
opened Mar 16, 2026 by
JiwaniZakir
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BUG: Fix 2D ExtensionArray handling in construction and CSV serialization
#64634
opened Mar 16, 2026 by
jbrockmendel
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2 tasks done
BUG: fix "1 ," converting to 1 by
read_csv c engine with tsep
#64631
opened Mar 16, 2026 by
bilichboris
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5 of 7 tasks
TST: add regression test for groupby agg with multiple partial functions
#64618
opened Mar 15, 2026 by
Sarah-2003
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3 tasks done
TST: add regression test for enlarging a DataFrame by adding an extra column with a tz-aware datetime results in object dtype
#64616
opened Mar 15, 2026 by
syedmuhammadayyanibrar
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3 of 7 tasks
DEPR: .values lossy behavior for DatetimeTZDtype, PeriodDtype, IntervalDtype
API - Consistency
Internal Consistency of API/Behavior
Deprecate
Functionality to remove in pandas
#64613
opened Mar 15, 2026 by
jbrockmendel
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4 tasks done
2
PERF: speed up strftime for common format directives
Performance
Memory or execution speed performance
#64609
opened Mar 15, 2026 by
jbrockmendel
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6 tasks done
DOC: Clarify reindexing in column assignment (#39845)
Docs
Indexing
Related to indexing on series/frames, not to indexes themselves
#64601
opened Mar 15, 2026 by
AKSHAY355-a
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4 of 7 tasks
ENH: Migrate numpydoc validation to sphinx
Docs
#64595
opened Mar 14, 2026 by
tuhinsharma121
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4 tasks done
DEPR: deprecate non-ndarray/Series/Index x in cut and qcut
Deprecate
Functionality to remove in pandas
#64589
opened Mar 14, 2026 by
jbrockmendel
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3 tasks done
TST: Add regression test for GH#55969
#64587
opened Mar 13, 2026 by
syedmuhammadayyanibrar
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7 tasks
DOC: clarifying min_itemsize in HDFStore.append and HDFStore.put documentation
Docs
IO HDF5
read_hdf, HDFStore
#64583
opened Mar 13, 2026 by
K0Stek122
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7 tasks done
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