On Thu, Aug 14, 2014 at 7:02 PM, Chris Angelico <ros...@gmail.com> wrote:
> On Thu, Aug 14, 2014 at 7:59 PM, Makoto Kuwata <kwa...@gmail.com> wrote: > > I understand that 'val = yield from xs' is completely different from:: > > > > for x in xs: > > ret = yield x > > val = x > > > > Return value is propagated by StopIteration, like: > > > > it = iter(xs) > > try: > > while 1: > > yield next(it) > > except StopIteration as ex: > > val = ex.value > > It's even more complicated than that. The PEP specifies the exact > semantics. > > ChrisA > Well, I wrote the above code in order to describe `value is propagated by StopIteration' because I misunderstood that it is propagated by return value of yield statement (see my first post). I have known that `yield from` is very complicated (thanks to your reply). -- regards, kwatch
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