On Tue, Apr 24, 2018 at 11:28 AM, Chris Angelico <ros...@gmail.com> wrote:
> On re-thinking this, I think the distinction IS possible, but (a) only > in function/class scope, not at global; and (b) would be defined in > terms of lexical position, not run-time. For instance: > > def f(): > (a = 1) # Legal; 'a' has not been used yet > a = 2 # doesn't change that > > def f(a): > (a = 1) # Invalid - 'a' has been used already > > def f(): > while (a = get_next()): # Legal > ... Now *this* is a weird rule. Moving functions around files would become impossible. Please experiment with my reference implementation, it already implements my proposal in full. Loops and inline assignments work as expected in it. Yury _______________________________________________ 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
