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Mon May 3 09:58:01 EDT 2004 · http://mail.python.org/pipermail/python-dev/2004-May/044643.html

Guido van Rossum:

> My counter to that is that *any* use of genexps where the consumer
> doesn't consume (or discard) the iterator before the next line is
> reached is extremely advanced use.

This might be worth putting in the PEP and the docs -- 

Normal usage of a generator expression is to immediately consume 
the entire sequence, or to discard the remainder.  

If portions of a generator *are* used later, programmers may need 
some extra precautions to ensure that all names still have the 
desired bindings.  

-jJ

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Showing content from http://mail.python.org/pipermail/python-dev/2004-May/044643.html below:

[Python-Dev] PEP 289 - Generator Expressions