[Python-Dev] Tricky way of of creating a generator via a comprehension expression

[Ivan Levkivskyi]

On 23 November 2017 at 09:17, Greg Ewing <greg.ewing at canterbury.ac.nz>
wrote:

> Ivan Levkivskyi wrote:
>
>> "People sometimes want to refactor for-loops containing `yield` into a
>> comprehension
>>
>
> By the way, do we have any real-life examples of people wanting to
> do this? It might help us decide what the semantics should be.
>
>
Yes, there are two SO questions in two first posts here, also there are
some b.p.o. issues. It looks like in all case people expect:

    def f():
        return [(yield i) for i in range(3)]

to be roughly equivalent to

    def f():
        res = []
        for i in range(3):
            r = yield i
            res.append(r)
        return res

See Serhiy's original post for more detailed proposed semantic equivalence.

--
Ivan
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