Incorrect scope of list comprehension variables

Aahz aahz at
Fri Apr 16 11:48:03 EDT 2010

In article <4bb92850$0$8827$c3e8da3 at>,
Steven D'Aprano  <steve at> wrote:
>Nevertheless, it is a common intuition that the list comp variable should 
>*not* be exposed outside of the list comp, and that the for-loop variable 
>should. Perhaps it makes no sense, but it is very common -- I've never 
>heard of anyone being surprised that the for-loop variable is exposed, 
>but I've seen many people surprised by the fact that list-comps do expose 
>their loop variable.

I've definitely seen people surprised by the for-loop behavior.
Aahz (aahz at           <*>

"It is easier to optimize correct code than to correct optimized code."
--Bill Harlan

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