On Sat, May 4, 2019 at 12:29 PM Ralf Gommers <ralf.gommers@gmail.com> wrote:
We seem to have run out of steam a bit here.
We discussed this today in person at the NumPy sprint.

The consensus was to go for a name like __skip_array_function__. Ufuncs don't have very good use-cases for a function that skips dispatch:
1. The overhead of the ufunc dispatch machinery is much smaller, especially in the case where all arguments are NumPy arrays, because there is no need for a wrapper function in Python.
2. Inside __array_ufunc__ it's possible to cast arguments into NumPy arrays explicitly and then call the ufunc again. There's no need to explicitly skip overrides.

We also don't really care about supporting the use-case where a function gets changed into a ufunc. We already warn users not to call __skip_array_function__ directly (without using getattr) outside __array_function__.

Given all this, it seems best to stick with a name that mirrors __array_function__ as closely as possible. I picked "skip" instead of "skpping" just because it's slightly shorter, but otherwise don't have a strong preference.

I've edited the NEP [1] and implementation [2] pull requests to use this new name, and clarify the use-cases. If there no serious objections, I'd love to merge these soon, in time for the NumPy 1.17 release candidate.

[1] https://github.com/numpy/numpy/pull/13305
[2] https://github.com/numpy/numpy/pull/13389