[Numpy-discussion] Deprecating matrices.

[Charles R Harris]

On Mon, Jan 2, 2017 at 8:29 PM, Nathaniel Smith <njs at pobox.com> wrote:

> On Mon, Jan 2, 2017 at 7:12 PM, Charles R Harris
> <charlesr.harris at gmail.com> wrote:
> >
> >
> > On Mon, Jan 2, 2017 at 7:26 PM, <josef.pktd at gmail.com> wrote:
> [...]
> >> How about dropping python 2 support at the same time, then we can all be
> >> in a @ world.
> >>
> >
> > The "@" operator works with matrices already, what causes problems is the
> > combination  of matrices with 1-D arrays. That can be fixed, I think. The
> > big problem is probably the lack of "@" in Python 2.7. I wonder if there
> is
> > any chance of getting it backported to 2.7 before support is dropped in
> > 2020? I expect it would be a fight, but I also suspect it would not be
> > difficult to do if the proposal was accepted. Then at some future date
> > sparse could simply start returning arrays.
>
> Unfortunately the chance of Python 2.7 adding support for "@" is best
> expressed as a denormal.
>

That's what I figured ;) Hmm, matrices would work fine with the current
combination of '*' (works for scalar muiltiplication) and '@' (works for
matrices). So for Python3 code currently written for matrices can be
reformed to be array compatible. But '@' for Python 2.7 would sure help...

Chuck
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