API Change for arithmetic methods for non-pandas objects #17767
Description
Possible API breakage for dask in #16821
import dask.dataframe as dd import pandas as pd from dask.dataframe.utils import assert_eq s = dd.core.Scalar({('s', 0): 10}, 's', 'i8') pdf = pd.DataFrame({'a': [1, 2, 3, 4, 5, 6, 7], 'b': [7, 6, 5, 4, 3, 2, 1]}) result = (pdf + s).dtypes # This now casts to object, used to retain int64 expected = pdf.dtypes assert_eq(result, expected)In master, result is now (object, object). Before it was (int64, int64).
I'm looking into #16821 to see if this was unintentional, and can be avoided.