[Python-ideas] The async API of the future: yield-from

Greg Ewing greg.ewing at canterbury.ac.nz
Wed Oct 17 08:04:31 CEST 2012

Calvin Spealman wrote:
> If we don't kick whatever
> handles the callback and result immediately, we are essentially
> re-introducing pre-emptive scheduling. If TaskA is waiting on the
> result of TaskB, and when TaskB finishes we say "OK, but we need to go
> let TaskC do something before TaskA is given that result" then we
> leave room for C to break things, modify state, and generally act in a
> less-than-determinable way.

I don't see how the risk of this is any higher than the risk
that some other task D gets run while task A is waiting and
messes something up.

Ultimately you have to trust your tasks to behave themselves.


More information about the Python-ideas mailing list