BUG: Fix DataFrame reduction to preserve NaN vs <NA> in mixed dtypes (GH#62024) #62027
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(GH#62024)
This PR fixes a bug in (DataFrame._reduce) where reductions on (DataFrames) with mixed dtypes (e.g., float64 and nullable integer Int64) would incorrectly upcast all results to use pd.NA and the Float64 dtype if any column was a pandas extension type.
Please let me know if my approach or fix needs any improvements . I’m open to feedback and happy to make changes based on suggestions.
Thankyou!