no side effects

["Martin v. Löwis"]

holger krekel wrote:
> 'i' might not be local but usually it is.  When answering 
> newcomer questions i try to refrain from talking in language
> lawyer details (as much as possible).  I only tried to explain the 
> for-loop from the viewpoint of names bound to objects.  I didn't 
> want to compare iteration protocols between python and C++ just 
> to explain that. 

I'm uncertain though whether an actually incorrect explanation helps the 
newcomer. Namespaces are totally irrelevant for this feature of the for 
loop. The fact that there is a hidden index variable should be easy to 
understand for each newcomer (the fact that the index variable now is an 
iterator might be confusing, though).

Regards,
Martin