On Tue, May 01, 2018 at 11:04:55AM +1000, Chris Angelico wrote:
> To be fair, I don't see many people replacing "x = 1" with "for x in
> [1]: pass". Even though it IS going to have the same effect. :-)
Aside from the pass, that is precisely one of the current work-arounds
for lack of binding-expressions inside comprehensions:
# inefficient, and wrong when f(x) has side-effects
[f(x) for x in iterable if f(x) > 1]
# what we'd like
[y for x in iterable if (y := f(x)) > 1]
# a work-around
[y for x in iterable for y in [f(x)] if y > 1]
I think that's even in your PEP, isn't it?
--
Steve
_______________________________________________
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
