[issue5577] yield in iterators

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> More experiments:
> The tuple pair (10,20) don't correspond to (i,i*i)

This is normal, since it corresponds to ((yield i), (yield i*i)).
The value of a yield expression is what the caller puts into send(), not
what is yielded to the caller. And since you sent 10 then 20, the
resulting tuple is (10, 20).

> The yield order is distorted

It is quite logical actually. The generator first has to yield two
values before being able to produce a third one (the tuple consisting of
the value of two "yield" expressions).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5577>
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