[Python-ideas] Async API: some code to review

Guido van Rossum guido at python.org
Tue Oct 30 00:21:38 CET 2012

On Mon, Oct 29, 2012 at 3:23 PM, Rene Nejsum <rene at stranden.com> wrote:
> On Oct 29, 2012, at 5:59 PM, Yury Selivanov <yselivanov.ml at gmail.com> wrote:
>> On 2012-10-29, at 12:07 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:
>>>> In the docstrings I use the prefix "COROUTINE:" to indicate public
>>>> APIs that should be invoked using yield from.
>>> Hmm, should they? Your approach looks a bit weird: you have functions
>>> that should use yield, and others that should use "yield from"? That
>>> sounds confusing to me.
>>> I'd much rather either have all functions use "yield", or have all
>>> functions use "yield from".
>>> (also, I wouldn't be shocked if coroutines had to wear a special
>>> decorator; it's a better marker than having the word COROUTINE in the
>>> docstring, anyway :-))
>> That's what bothers me is well.  'yield from' looks too long for a
>> simple thing it does (1); users will be confused whether they should
>> use 'yield' or 'yield from' (2); there is no visible difference between
>> a plain generator and a coroutine (3).
> I agree, was this ever commented ? I know it maybe late in the discussion
> but just because you can use yield/yield from for concurrent stuff, should you?

I explained my position on yield vs. yield from twice already in this thread.

--Guido van Rossum (python.org/~guido)

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