How would the community handle the scipy.sparse matrix subclasses? These are still in common use.
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 don't think the matrix class was a bad idea at the time. > > numpy was the underdog, I came from GAUSS and Matlab and numpy > arrays were just weird, especially loosing a dimension all the time > and the heavy required use of np.newaxis. > I guess nowadays kids don't learn `matrix` languages first anymore. > > recarrays are another half-hearted feature in numpy that is mostly > obsolete with pandas and pandas_like DataFrames in other > packages. > > > (I don't mind the changes, but the deprecation cycle is often short, > especially for users like me that update numpy only about every 3 main > versions.) > > Josef > > >> For 1.17, minimum python supposedly >> is >=3.5, so we will be guaranteed to have the matrix multiply >> operator @ available, and hence there is arguably even less of a case >> for keeping the matrix class; removing it would allow taking out quite >> a bit of accumulated special-casing (the immediate reasons for writing >> this were gh-10123 and 10132). >> >> What do people think? If we do go in this direction, we might want to >> add PendingDeprecationWarning for 1.15 (maybe DeprecationWarning for >> python3; for python2 matrix would never disappear). >> > All the best, >> >> Marten >> _______________________________________________ >> NumPy-Discussion mailing list >> NumPy-Discussion@python.org >> https://mail.python.org/mailman/listinfo/numpy-discussion >> > > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@python.org > https://mail.python.org/mailman/listinfo/numpy-discussion > >
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