[Numpy-discussion] Should unique types of all arguments be passed on in __array_function__?

[Marten van Kerkwijk]

Hi Stephan,

I fear my example about thinking about `ndarray.__array_function__`
distracted from the gist of my question, which was whether for
`__array_function__` implementations *generally* it wouldn't be handier to
have all unique types rather than just those that override
`__array_function__`. It would seem that for any other implementation than
for numpy itself, the presence of __array_function__ is indeed almost
irrelevant. As a somewhat random example, why would it, e.g., for DASK be
useful to know that another argument is a Quantity, but not that it is a
file handle? (Presumably, it cannot handle either...)

All the best,

Marten
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