On Sun, Feb 24, 2013 at 12:57 AM, Vinay Sajip <vinay_sa...@yahoo.co.uk> wrote: > Nick Coghlan <ncoghlan <at> gmail.com> writes: > >> Daniel is a fan of this syntax, but I think it is inferior to the >> implied approach, so don't expect it to survive to any accepted >> version of the PEP :) > > Another thing against ~= is that it isn't valid Python syntax. It's not a > deal- > breaker, but it does mean that you can't e.g. use the ast module in the > implementation. This might be a factor if the mini-language ever grows (as it > recently did, adding parentheses).
Daniel persuaded me that the *semantics* of Ruby's ~> pessimistic version comparison operator are highly desirable. I liked them so much, I'm now proposing them as the default behaviour of version specifiers. Thus, the "~=" operator goes away, and you can use "==" to explicitly request the previously proposed default behaviour, or just append an extra ".0" if you're more pessimistic about a dependency's backwards compatibility policies than the default interpretation. This and other aspects will be brought up on distutils-sig at some point not too far in the future :) Cheers, Nick. -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
