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Fri Oct 21 06:58:28 CEST 2005 · http://mail.python.org/pipermail/python-dev/2005-October/057488.html

> so the new syntax would
> not be useful, unless it was something that provided access to the index
> item as a variable, like:
> 
> yield foo(i) for i in x
> 
> which barely saves you anything (a colon, a newline, and an indent).

Not even that, because you can omit the newline and indent:

	for i in x: yield foo(i)

There's a bigger difference between

	for i in x: yield i

and

	yield from x

Moreover, I can imagine optimization opportunities for "yield from" that
would not make sense in the context of comprehensions.

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[Python-Dev] Coroutines, generators, function calling