Hello! I’m trying to investigate the exact way ufunc.reduce works when given a custom dtype. Does it cast before or after the operation, or somewhere in between? How does this differ from ufunc.reduceat, for example?
We ran into this issue in pydata/sparse#191 (https://github.com/pydata/sparse/issues/191) when trying to match the two where the only thing differing is the number of zeros for sum, which shouldn’t change the result. Best Regards, Hameer Abbasi
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