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Wed Nov 26 02:29:59 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-November/137198.html

On Wed, Nov 26, 2014 at 11:58 AM, Greg <greg.ewing at canterbury.ac.nz> wrote:
> The Abstract claims that the proposal will "unify the behaviour of
> list comprehensions and generator expressions", but it doesn't do
> that.

I don't know that it completely unifies the behaviours, but it does
merge them on the specific situation of a leaking StopIteration. With
the original code examples that sparked this all off (see the first
footnote in the PEP), current CPython has the list-comp form terminate
cleanly, while the genexp form infinitely loops. With the POC patch on
the issue tracker, both forms cause RuntimeError. Is there a better
word than "unify" for that?

ChrisA

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[Python-Dev] Please reconsider PEP 479.