[Python-Dev] elimination of scope bleeding of iteration variables

Mon May 1 11:34:17 CEST 2006

Nick Coghlan wrote:
> However, the scoping of for loop 
> variables won't change, as the current behaviour is essential for search loops 
> that use a break statement to terminate the loop when the item is found. 

It occurs to me that there's a middle ground here:
leave the loop variable scope alone, but make it
an error to use the same variable in two different
loops at the same time.
e.g.
 for x in stuff:
 if its_what_were_looking_for(x):
 break
 snarfle(x)
 for x in otherstuff:
 dosomethingelse(x)
would be fine, but
 for x in stuff:
 for x in otherstuff:
 dosomethingelse(x)
would be a SyntaxError because the inner loop
is trying to use x while it's still in use by the
outer loop.
--
Greg