On Thu, Mar 30, 2017 at 11:05 AM, Oleg Nesterov <o...@redhat.com> wrote: > On 03/28, Eric Snow wrote: >> >> On Mon, Mar 20, 2017 at 11:30 AM, Oleg Nesterov <o...@redhat.com> wrote: >> > Hello, >> > >> > Let me first clarify, I do not claim this is a bug, I am trying to learn >> > python and now I trying to understand yield-from. >> >> Given that you haven't gotten a response here, > > and this looks a bit strange. My question is simple, the implementation looks > clear and straightforward, I am a bit surprised none of cpython devs bothered > to reply. > >> you may want to take >> this over to the core-mentors...@python.org list. > > Well, I'm afraid to contact this closed and not-for-mortals list, not sure > this very basic question should go there ;) perhaps you are already a member, > feel free to forward.
core-mentorship is intended as a friendly place for folks who are starting to study CPython internals. I'm not sure where you got the impression that it's not-for-mortals but I suspect the people running it would like to know so they can fix it :-). In any case the short answer to your original question is that PEP 342 says that generator finalization calls the generator's close() method, which throws a GeneratorExit into the generator, and PEP 380 says that as a special case, when a GeneratorExit is thrown into a yield from, then this is propagated by calling .close() on the yielded-from iterator (if such a method exists) and then re-raised in the original generator. -n -- Nathaniel J. Smith -- https://vorpus.org _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
