[Numpy-discussion] miniNEP1: where= argument for ufuncs

[Lluís]

Sorry, but I didn't find a way of inserting inline comments in the gist.

Nathaniel Smith writes:
[...]
> Is there any less stupid-looking name than ``where1=`` and ``where2=``
> for the ``.outer`` operation? (For that matter, can ``.outer`` be
> applied to more than 2 arrays? The docs say it can't, but it's
> perfectly well-defined for arbitrary number of arrays too, so maybe we
> want an interface that allows for 3-way, 4-way etc. ``.outer``
> operations in the future?)

Well, if outer can indeed be defined for an arbitrary number of arrays
(and if it's going to be sometime in the future), I'd say the simplest
is to use an array:

    .outer(a, b, ..., where = [my_where1, my_where2, ...])


Lluis

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