pandas
https://github.com/pandas-dev/pandas
Python
Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
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- Issues
- PERF: restore libjoin fastpath for CategoricalIndex intersection/union
- BUG: fix to_csv chunksize producing inconsistent dt64/td64 formatting
- BUG: astype from tz-naive to tz-aware uses tz_localize semantics
- BUG: improve error message for duplicate columns in pd.melt (GH61475)
- BUG: Series.transform now raises SpecificationError for duplicate function names (GH#54929)
- BUG: Preserve dtype for NA columns during DataFrame reindex
- PERF: Specify `how` when calling `merge._factorize_keys` when possible
- BUG: Fix str.replace with empty pattern hanging on pyarrow backend
- BUG: fix `str.replace("", ..)` with empty pattern hanging when using pyarrow
- BUG: .loc with mixed scalar/slice on MultiIndex now drops scalar-keyed levels
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