On Mon, Dec 11, 2017 at 6:21 PM, Franklin? Lee firstname.lastname@example.org wrote:
What about hanging onto just the value, and creating new StopIteration instances instead of raising the same one again?
Doesn't really matter, as we're still prolonging the lifespan of the returned object.
To me the current behaviour of generators seems fine. For regular generator users this is a non-problem. For trampolines and async frameworks--so many of them have been implemented and all of them worked around this issue in one way or another.
I would have attached the returned value to the generator object, but for some reason, generator and coroutine objects can't take attributes. Maybe I should ask for that feature instead.
You can use a WeakKeyDictionary to associate any state with a generator; that should solve your problem. We wouldn't want to add __dict__ to generators to have another way of doing that.