On Wed, Aug 30, 2017 at 8:19 AM, Koos Zevenhoven <k7ho...@gmail.com> wrote: > On Wed, Aug 30, 2017 at 2:36 AM, Greg Ewing <greg.ew...@canterbury.ac.nz> > wrote: >> >> Yury Selivanov wrote: >>> >>> While we want "yield from" to have semantics close to a function call, >> >> >> That's not what I said! I said that "yield from foo()" should >> have semantics close to a function call. If you separate the >> "yield from" from the "foo()", then of course you can get >> different behaviours. >> >> But that's beside the point, because I'm not suggesting >> that generators should behave differently depending on when >> or if you use "yield from" on them. >> >>> For (1) we want the context change to be isolated. For (2) you say >>> that the context change should propagate to the caller. >> >> >> No, I'm saying that the context change should *always* >> propagate to the caller, unless you do something explicit >> within the generator to prevent it. >> >> I have some ideas on what that something might be, which >> I'll post later. >> > > FYI, I've been sketching an alternative solution that addresses these kinds > of things. I've been hesitant to post about it, partly because of the > PEP550-based workarounds that Nick, Nathaniel, Yury etc. have been > describing, and partly because that might be a major distraction from other > useful discussions, especially because I wasn't completely sure yet about > whether my approach has some fatal flaw compared to PEP 550 ;).
We'll never know until you post it. Go ahead. Yury _______________________________________________ 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
