isPrime works but UnBoundLocalError when mapping on list

[Tim Golden]

Andreas Tawn wrote:
> Terry Reedy wrote:
>> Wrong.
> Thank you.
> 
>> For loop variables continue after the loop exits.  This is 
>> intentional.
> I never knew that and I can't find reference to it in the docs. 

Interesting starting point. It never occurred to me
that they might not. (So I didn't look for anything
in the docs when they did :) ).

TJG