So we are keeping asynchronous generator expressions as long as they are defined in an 'async def' coroutine?
Yury On Sat, Nov 25, 2017 at 12:17 PM Brett Cannon <br...@python.org> wrote: > > > On Fri, Nov 24, 2017, 19:32 Guido van Rossum, <gu...@python.org> wrote: > >> On Fri, Nov 24, 2017 at 4:22 PM, Guido van Rossum <gu...@python.org> >> wrote: >> >>> The more I hear about this topic, the more I think that `await`, `yield` >>> and `yield from` should all be banned from occurring in all comprehensions >>> and generator expressions. That's not much different from disallowing >>> `return` or `break`. >>> >> >> From the responses it seems that I tried to simplify things too far. >> Let's say that `await` in comprehensions is fine, as long as that >> comprehension is contained in an `async def`. While we *could* save `yield >> [from]` in comprehensions, I still see it as mostly a source of confusion, >> and the fact that the presence of `yield [from]` *implicitly* makes the >> surrounding `def` a generator makes things worse. It just requires too many >> mental contortions to figure out what it does. >> >> I still propose to rule out all of the above from generator expressions, >> because those can escape from the surrounding scope. >> > > +1 from me. > > -Brett > > >> -- >> --Guido van Rossum (python.org/~guido) >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev@python.org >> https://mail.python.org/mailman/listinfo/python-dev >> > Unsubscribe: >> https://mail.python.org/mailman/options/python-dev/brett%40python.org >> > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/yselivanov.ml%40gmail.com >
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