I understand why it could be useful to have this in asyncio. But I'm big -1 on rushing this functionality in 3.7.
asyncio is no longer provisional, so we have to be careful when we design new APIs for it. Example: I wanted to add support for Task groups to asyncio. A similar concept exists in curio and trio and I like it, it can be a big improvement over asyncio.gather. But there are too many caveats about handling multiple exceptions properly (MultiError?) and some issues with cancellation. That's why I decided that it's safer to prototype TaskGroups in a separate package, than to push a poorly thought out new API in 3.7. Same applies to your proposal. You can easily publish a package on PyPI that provides an improved version of asyncio event loop. You won't even need to write a lot of code, just overload a few methods. Yury Sent from my iPhone > On Jan 2, 2018, at 8:00 PM, Pau Freixes <pfrei...@gmail.com> wrote: > > Agree, poll_start and poll_end suit much better. > > Thanks for the feedback. > > On Tue, Jan 2, 2018 at 1:34 AM, INADA Naoki <songofaca...@gmail.com> wrote: >>>>> For this proposal [4], POC, I've preferred make a reduced list of events: >>>>> >>>>> * `loop_start` : Executed when the loop starts for the first time. >>>>> * `tick_start` : Executed when a new loop tick is started. >>>>> * `io_start` : Executed when a new IO process starts. >>>>> * `io_end` : Executed when the IO process ends. >>>>> * `tick_end` : Executed when the loop tick ends. >>>>> * `loop_stop` : Executed when the loop stops. >>>> >>>> What do you call a "IO process" in this context? >>> >>> Basically the call to the `select/poll/whatever` syscall that will ask >>> for read or write to a set of file descriptors. >> >> `select/poll/whatever` syscalls doesn't ask for read or write. >> It waits for read or write (more accurate, waits for readable or >> writable state). >> >> So poll_start / poll_end looks better name to me. >> >> INADA Naoki <songofaca...@gmail.com> >> >> >>> >>> Thanks, >>> >>> -- >>> --pau >>> _______________________________________________ >>> Async-sig mailing list >>> Async-sig@python.org >>> https://mail.python.org/mailman/listinfo/async-sig >>> Code of Conduct: https://www.python.org/psf/codeofconduct/ > > > > -- > --pau > _______________________________________________ > Async-sig mailing list > Async-sig@python.org > https://mail.python.org/mailman/listinfo/async-sig > Code of Conduct: https://www.python.org/psf/codeofconduct/ _______________________________________________ Async-sig mailing list Async-sig@python.org https://mail.python.org/mailman/listinfo/async-sig Code of Conduct: https://www.python.org/psf/codeofconduct/
