Inasmuch as I get to opine, I'm +1 on SyntaxError. There is no behavior for
that spelling that I would find intuitive or easy to explain to students.
And as far as I can tell, the ONLY time anything has ever been spelled that
way is in comments saying "look at this weird edge case behavior in Python."
On Nov 22, 2017 10:57 AM, "Jelle Zijlstra" <jelle.zijls...@gmail.com> wrote:
2017-11-22 9:58 GMT-08:00 Guido van Rossum <gu...@python.org>:
> Wow, 44 messages in 4 hours. That must be some kind of record.
>
> If/when there's an action item, can someone summarize for me?
>
> The main disagreement seems to be about what this code should do:
g = [(yield i) for i in range(3)]
Currently, this makes `g` into a generator, not a list. Everybody seems to
agree this is nonintuitive and should be changed.
One proposal is to make it so `g` gets assigned a list, and the `yield`
happens in the enclosing scope (so the enclosing function would have to be
a generator). This was the way things worked in Python 2, I believe.
Another proposal is to make this code a syntax error, because it's
confusing either way. (For what it's worth, that would be my preference.)
There is related discussion about the semantics of list comprehensions
versus calling list() on a generator expression, and of async semantics,
but I don't think there's any clear point of action there.
> --
> --Guido van Rossum (python.org/~guido)
>
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