On Fri, Dec 1, 2017 at 8:39 AM, Charles R Harris <charlesr.har...@gmail.com> wrote:
> > > On Thu, Nov 30, 2017 at 11:43 AM, Ralf Gommers <ralf.gomm...@gmail.com> > wrote: > >> >> >> On Fri, Dec 1, 2017 at 7:17 AM, Matthew Rocklin <mrock...@gmail.com> >> wrote: >> >>> How would the community handle the scipy.sparse matrix subclasses? >>> These are still in common use. >>> >> >> They're not going anywhere for quite a while (until the sparse ndarrays >> materialize at least). Hence np.matrix needs to be moved, not deleted. We >> discussed this earlier this year: https://mail.python.org/piperm >> ail/numpy-discussion/2017-January/076332.html >> >> >>> Somewhat related: https://github.com/scipy/scipy/issues/8162 >>> >>> On Thu, Nov 30, 2017 at 1:13 PM, <josef.p...@gmail.com> wrote: >>> >>>> >>>> >>>> On Thu, Nov 30, 2017 at 9:23 AM, Marten van Kerkwijk < >>>> m.h.vankerkw...@gmail.com> wrote: >>>> >>>>> Hi All, >>>>> >>>>> I wondered if the move to python3-only starting with numpy 1.17 would >>>>> be a good reason to act on what we all seem to agree: that the matrix >>>>> class was a bad idea, with its overriding of multiplication and lack >>>>> of support for stacks of matrices. >>>> >>>> >> I'd suggest any release in the next couple of years is fine,but the one >> where we drop Python 2 support is probably the worst choice. That's one of >> the few things the core Python devs got 100% right with the Python 3 move: >> advocate that in the 2->3 transition packages would not make any API >> changes in order to make porting the least painful. >> >> Ralf >> > > Agree, we don't want to pile in too many changes at once. I think the big > sticking point is the sparse matrices in SciPy, even issuing a > DeprecationWarning could be problematic as long as there are sparse > matrices. May I suggest that we put together an NEP for the NumPy side of > things? Ralf, does SciPy have a mechanism for proposing such changes? > Not an official one, but any NEP-like proposal can be considered. I imagine the NEP itself will have to say something about it anyway, so could as well put it all in there. Ralf
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