On Fri, Jan 10, 2020 at 3:53 PM E. Madison Bray <erik.m.b...@gmail.com> wrote:
> On Fri, Jan 10, 2020 at 10:41 AM Timo Kaufmann <eisfre...@gmail.com> > wrote: > > > > I have said this before, but I feel like the point was dropped out of > the discussion so I'll stress it again. The major issue here is *not* the > compatibility of sage's own codebase. A few "from __future__ import"'s are > not so bad. > > > > The issue is that python2 compatibility forces us to use outdated > versions of a lot of libraries, since many libraries have dropped python2 > support a while ago. This is a big headache especially for packagers. Those > outdated libraries are generally not available on distros. At the same time > sage is usually not compatible with the newer versions. Sage is already > difficult to package, and that makes it a lot more difficult. > > Can you be more specific about this? What is it about Sage's upstream > codebase maintaining backwards-compatibility for Python 2 that > prevents you from packaging it for Python 3 only, given that it does > support Python 3? No one is saying that just because upstream support > is maintained for Python 2 for one or two (at the most) more releases, > any downstream packagers have to package it for Python 2. > I'll give an example. sage has rpy2 2.8.2. rpy2 latest is 3.2.4 but 3.x series is python 3 only and sage requires breaking changes to support rpy2 3.x. See https://trac.sagemath.org/ticket/28494#comment:6 While python2 support for rpy2 is required, sage codebase can't be updated to 3.x (unless someone adds code to detect rpy2 version and support both 2.8.2 and 3.2.4) Isuru > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/CAOTD34ZqHf%2BrzoSD8juhhk%3D4YF1WB6BHZuxAOO0ZQYk6KhhX_g%40mail.gmail.com > . > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CA%2B01voMi8UybPwJMB_dq9RfeULarnQ_pWrXj09Fxbc%3D2_kiviA%40mail.gmail.com.
