[Python-Dev] Please reconsider PEP 479. (original) (raw)

Guido van Rossum guido at python.org
Thu Nov 27 02:15:58 CET 2014

On Wed, Nov 26, 2014 at 2:53 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:

On 27 Nov 2014 06:35, "Guido van Rossum" <guido at python.org> wrote: [...]

> I think we can put a number to "much faster" now -- 150 nsec per try/except. > > I have serious misgivings about that decorator though -- I'm not sure how viable it is to pass a flag from the function object to the execution (which takes the code object, which is immutable) and how other Python implementations would do that. But I'm sure it can be done through sheer willpower. I'd call it the @hettinger decorator in honor of the PEP's most eloquent detractor. :-) I agree with everything you wrote in your reply, so I'll just elaborate a bit on my proposed implementation for the decorator idea. This remark is ambiguous -- how strongly do you feel that this decorator should be provided? (If so, it should be in the PEP.)

(I'm snipping the rest of what you said, since I understand it: the flag on the code object even has a name in the PEP, it's REPLACE_STOPITERATION -- although I could imagine renaming it to GENERATOR_STOP to match the future.)

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