[Python-ideas] PEP 550 v2

[Nick Coghlan]

On 17 August 2017 at 02:55, Yury Selivanov <yselivanov.ml at gmail.com> wrote:
> And immediately after I hit "send" I realized that this is a bit more
> complicated.
>
> In order for Tasks to remember the full execution context of where
> they were created, we need a new method that would allow to run with
> *both* exec and local contexts:
>
>     class Task:
>
>        def __init__(self, coro):
>            ...
>            self.local_context = sys.new_local_context()
>            self.exec_context = sys.get_execution_context()
>
>        def step():
>
>          sys.run_with_contexts(self.exec_context, self.local_context,
> self.coro.send)

I don't think that's entirely true, since you can nest the calls even
without a combined API:

    sys.run_with_execution_context(self.exec_context,
sys.run_with_local_context, self.local_context, self.coro.send)

Offering a combined API may still make sense for usability and
efficiency reasons, but it isn't strictly necessary.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia