[Python-Dev] PEP 3152 and yield from Future() (original) (raw)

Greg Ewing greg.ewing at canterbury.ac.nz
Fri Apr 24 03:05:45 CEST 2015

Yury Selivanov wrote:

Another problem is functions that return future:

def dosomething(): ... return fut With Greg's idea to call it you would do: cocall (dosomething())() That means that you can't refactor your "dosomething" function and make it a coroutine.

There's no fundamental problem with a cofunction returning another cofunction:

codef do_something(): return fut

f = cocall do_something() result = cocall f()

Combining those last two lines into one would require some extra parenthesisation, but I don't think that's something you're going to be doing much in practice. If you're just going to immediately call the result, there's no point in returning a future -- just do it all in do_something().

-- Greg

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