One little point here:

* np.ndarray.cumprod: low importance -> prefer np.multiply.accumulate

I think that's and example of something that *should* be part of the numpy API, but should be implemented as a mixin, based on np.multiply.accumulate.

As I'm a still confused about the goal here, that means that:

Users should still use `.cumprod`, but implementers of numpy-like packages should implement `.multiply.accumulate`, and not directly `cumprod`, but rather use the numpy ABC, or however it is implemented.

-CHB

Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA 98115   (206) 526-6317   main reception

Chris.Barker@noaa.gov