Ron Adam <ron3...@gmail.com> added the comment:

There is a test for 'yield from' as a function argument without the extra 
parentheses.

      f(yield from x)

You do need them in the case of a regular yield.

      f((yield))   or f((yield value))

Shouldn't the same rule apply in both cases?

* I'm trying to do a version of the patch with 'yield_from' as a separate item 
from 'yield' in the grammar, but it insists on the parentheses due to it being 
a yield_expr component.

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nosy: +ron_adam

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11682>
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