On Sun, Oct 15, 2017 at 8:12 PM, Nick Coghlan <ncogh...@gmail.com> wrote:
> On 16 October 2017 at 11:33, Yury Selivanov <yselivanov...@gmail.com> > wrote: > >> Stage 2. When Python 3.7 is out, we'll see how people use execution >> contexts for async code and collect feedback. If we recognize that >> Python users want execution contexts for generators/asynchronous >> generators, we'll make a new PEP to add support for them in Python >> 3.8. That future discussion will be focused on generators >> specifically, and therefore I expect it to be somewhat more focused. >> > > As long as it's made clear that the interaction between context variables > and generators is formally undefined in 3.7, I think that's reasonable - > folks that want to ensure the current behaviour indefinitely should keep > using thread locals rather than switching over to context variables. > It shouldn't be formally undefined. It should have the semantics it acquires when you combine the existing (well-defined) formal semantics of generators with the (to be defined) formal semantics of context variables. -- --Guido van Rossum (python.org/~guido)
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