14.01.2011, 20:19, "Ian Kelly" <ian.g.ke...@gmail.com>:
> 2011/1/14 kost BebiX <k...@ya.ru>;:
>
>> Well, isn't tree is a root node and it's children?
>
> And its grandchildren, great-grandchildren, etc. What Alex is saying
> is that the implementation you posted traverses the root and its
> immediate children, but does not recur any further than that. That is
> why it was so fast.
Oh, yeah, sorry, forgot the recursion. It should be (if I'm not wrong again):
def post_order(self):
for child in self.childs:
for po in child.post_order():
yield po
yield self
if you give it more deepness:
$ python postorder.py
building tree...done
0:00:25.839462
doing generator post_order...done
0:00:02.776876
doing non-generator post_order...done
0:00:01.092648
still not bad, but if you'll give it more deepness
$ python postorder.py
building tree...done
0:00:16.078972
doing generator post_order...done
0:00:03.119023
doing non-generator post_order...done
0:00:00.841976
it will be worse
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