On Wed, 2018-11-14 at 14:32 -0500, Marten van Kerkwijk wrote:
Code being better than words: see https://github.com/numpy/numpy/pull/12388 for an implementation. The change in the code proper is very small, though it is worrying that it causes two rather unrelated tests too fail (even if arguably both tests were wrong).
Note that this does not give flexibility to put the axis where one wants; as written, the code made putting it at the start the obvious solution, as it avoids doing anything with the shapes of start and stop.
Hehe, my first gut feeling was the last axis to be the obvious one ;). This has been discussed before (but what hasn't) I believe, probably some old issue or even PR somewhere. I am mildly in favor, just because there is probably not much reason against an easy vectorization. Doesn't need to be advertised much in the docs anyway. Although it might be good to settle the "obvious" part in case I am not alone in first thinking of -1 being the obvious default. I would probably skip the axis argument for now, unless someone actually has a use case. I think this used to half work at some point, but it was probably so broken that we can just make it well defined? - Sebastian
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