[Python-Dev] Tricky way of of creating a generator via a comprehension expression
Sven R. Kunze
srkunze at mail.de
Thu Nov 23 02:51:44 EST 2017
On 23.11.2017 08:38, Ivan Levkivskyi wrote:
> I think this code should be just equivalent to this code
>
> def g():
> temp = [(yield i) for i in range(10)]
> return (v for v in temp)
>
> Semantics of the comprehension should be clear here (just an
> equivalent for-loop without name leaking)
Excuse me if I disagree here. If I were to understand this in real-world
code, I cannot imagine what will happen here.
A "yield" within a comprehension is like a "return" in a comprehension.
It makes no sense at all.
Also a "yield" and a "return with value" is also rarely seen.
Comprehensions build new objects, they are not for control flow, IMO.
Cheers,
Sven
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