On Fri, 2017-06-30 at 12:07 +1000, Nick Coghlan wrote: > On 30 June 2017 at 09:24, Adam Williamson <adamw...@fedoraproject.org> wrote: > > On Thu, 2017-06-29 at 16:50 -0500, Jason L Tibbitts III wrote: > > > > > > > > "AW" == Adam Williamson <adamw...@fedoraproject.org> writes: > > > > > > AW> Right, that's a good point. *Why* exactly do we want to go to all > > > AW> the trouble involved in making a switchover from 'python-foo' > > > AW> meaning 'the Python 2 module called foo' to meaning 'the Python 3 > > > AW> module called foo'? > > > > > > It's about users. Once "python" means python3 (which is a decision that > > > the python upstream will eventually make), a user should be getting a > > > python3 version when they type "dnf install python-foo". > > > > > > Packages should of course always specify the version and should never > > > use python-* for anything unless there is no alternative. (Which is the > > > what the current packaging guidelines state.) > > > > That seems like, frankly, quite a weak justification for all the > > trouble that's involved in migrating the 'meaning' of python-foo like > > this (and, as Smooge pointed out, potentially doing it *again* for > > Python 4, if it ever happens). > > FWIW, our current expectation upstream is that the release after > Python 3.9 will be Python 3.10 (Guido overcame his historical aversion > to 2-digit version segments around the time that 2.7.10 became a > necessity). > > Even if a 4.0 does happen, the magnitude of the change relative to the > preceding 3.x release is expected to be comparable to that between any > given 3.x and 3.x+1 release, so it wouldn't require the parallel stack > approach that has proven necessary to handle the core data model > changes that impacted the 2->3 transition.
I thought it would be tolerably obvious that I didn't mean "literally the specific conceptual Python 4.0 that at one point was expected to exist after 3.9" or "any specific Python 4 release that happens". Clearly what I meant was "any future non-backwards-compatible major Python release". Maybe *right now* you don't expect there to be one, but I'm sure there was probably a point during Python 1's lifetime at which no-one expected there to be a backwards-incompatible Python 2, and a point during Python 2's lifetime at which no-one expected there to be a backwards-incompatible Python 3... -- Adam Williamson Fedora QA Community Monkey IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net http://www.happyassassin.net _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org
