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Tue Jan 20 21:42:36 CET 2009 · https://mail.python.org/pipermail/python-dev/2009-January/085255.html

Gerald Britton wrote:
> I wonder if this is a bug?

Nope, it's part of the defined behaviour. Avoiding the overhead of the
GE machinery is actually the main advantage in using a comprehension
over the equivalent generator expression. Deliberately raising
StopIteration is about the only way to notice the small semantics
difference (in Py3k anyway - in 2.x there are scoping differences as well).

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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Add a "while" clause to generator expressions