At 03:14 PM 10/21/03 -0700, Guido van Rossum wrote:
[Samuele]
so this, if I understand:
def h(): y = 0 l = [1,2] it = (x+y for x in l) y = 1 for v in it: print v
will print 1,2 and not 2,3
unlike:
def h(): y = 0 l = [1,2] def gen(S): for x in S: yield x+y it = gen(l) y = 1 for v in it: print v
Argh. Of course.
No, I think it should use the actual value of y, just like a nested function.
Why?
Never mind that idea then.
Actually, I consider Samuele's example a good argument in *favor* of the idea. Because of the similarity between listcomps and generator expressions (gen-X's? ;) ) it seems late binding of locals would lead to people thinking the behavior is a bug. Since a genex is not a function (at least in form) a late binding would be very non-obvious and counterintuitive relative to other kinds of expressions.