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Mon May 3 11:58:12 EDT 2004 · https://mail.python.org/pipermail/python-dev/2004-May/044644.html

On Fri, Apr 23, 2004, Jeremy Hylton wrote:
>
> That leads me to wonder what exactly the rationale for generator
> expressions is.  The PEP says that "time, clarity, and memory are
> conserved by using an generator expression" but I can only see how
> memory is conserved.  That is, I don't find them any easier to read than
> list comprehensions and I don't understand the performance implications
> very well.  It's not obvious to me that their faster.

I've been skimming due to being out of town and catching up, but I
haven't seen a direct response to Jeremy's question about the rationale.
Jeremy, do you still want an answer?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I used to have a .sig but I found it impossible to please everyone..."  --SFJ

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[Python-Dev] PEP 289 - Generator Expressions