[Python-ideas] Are there asynchronous generators?
yselivanov.ml at gmail.com
Mon Jun 29 00:14:20 CEST 2015
On 2015-06-28 11:52 AM, Paul Sokolovsky wrote:
>> There is also the problem that one cannot easily feed a queue,
>> >asynchronous generator, or any asynchronous iterator to a simple
>> >synchronous consumer like sum() or list() or "".join(). It would be
>> >nice if there was a way to wrap them to asynchronous ones when needed
>> >– something like (async sum)(asynchronously_produced_numbers()).
> All that is easily achievable with classical Python coroutines, not
> with asyncio garden variety of coroutines, which lately were casted
> into a language level with async/await disablers:
> def coro1():
> yield 1
> yield 2
> yield 3
> def coro2():
> yield from coro1()
> yield 4
> yield 5
You have easily achieved combining two generators with 'yield from' and
feeding that to 'sum' builtin.
There is no way to combine synchronous loops with asynchronous
coroutines; by definition, the entire process will block while you are
iterating trough them.
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