Coroutine and native coroutine generator

Question

I just read PEP0492 talking about a new approach on coroutines, but PEP could not make me understand the difference between generator-based coroutines and their native ones. Can someone tell me the difference (maybe with examples)?

For what I understand, they use different words (yield / yield from and await / async / yield). I understand that an exit is expected at the end of the native coroutine, but this is also true for generator ones.

Answer 1

There is no functional difference. “Native coroutines” using keywords asyncand awaitis just syntactic sugar for what was previously implemented in “generator-based coroutines”.

Use asyncand awaitrecommended in 3.5 docs if there is no need to support older Python versions .

Answer 2

, Mike S: CPython , , . , , PEP-492 " ". , , . :

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• await foo , yield from foo , , await , yield from .
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• Coroutines , . , await coroutine.

asyncio , .

Answer 3

, . , , , , , , , . , yield ( yield from python 3.3), pythonic.

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@asyncio.coroutine
def print_sum(x, y):
    result = yield from compute(x, y)

    #write callback code
    print("%s + %s = %s" % (x, y, result))