On Fri, Apr 27, 2018 at 1:38 AM, Gustavo Carneiro <gjcarne...@gmail.com> wrote: > > > On 26 April 2018 at 16:18, Chris Angelico <ros...@gmail.com> wrote: >> >> On Thu, Apr 26, 2018 at 11:13 PM, Martin Teichmann >> <lkb.teichm...@gmail.com> wrote: >> > Hi list, >> > >> > when reading PEP 572 I actually liked it a lot - I think it's actually >> > a cool idea. I think it's actually that cool an idea that it should be >> > made the default way of doing an assignment, over time phasing out the >> > good ole =. >> > >> > This would have several benefits: >> > >> > - people wouldn't have to worry about two different options >> > - different things would have a different look: assignment is :=, >> > keyword args is =, while comparison is ==. Especially beginners would >> > benefit from this clarity. >> > >> > in this case, for sure, we should make it possible to chain :=s, for >> > example by making it bind right-to-left, so that a := b := 3 would be >> > a := (b := 3) >> > >> > I'm sorry if somebody brought that up already, but the discussion has >> > grown so huge that I couldn't read through it entirely. >> >> It has indeed grown huge. And in the interests of not growing it even >> huger, I'm not going to rehash the arguments against making := into >> the one and only operator, save to say one thing: there's no way that >> "x = 1" can be removed from the language any time soon, and by "soon" >> I mean even by the Yes Prime Minister definition, where "any day now", >> in strategic terms, meant "within the next half century". > > > In the interest of that, do you think := can be made illegal, by the > grammar, if used outside an expression? > > a = 1 # legal > a := 1 # Syntax error > if a := 1: # legal >
No. Any expression may be used as a statement, so this isn't "outside an expression". ChrisA _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
