(self)
Return a post-order iterator for the tree.
Return a post-order iterator for the tree.
Return a post - order iterator for the tree .
def post_order(self):
        """Return a post-order iterator for the tree."""
        for child in self.children:
            for node in child.post_order():
                yield node
        yield self
def post_order ( self ) : for child in self . children : for node in child . post_order ( ) : yield node yield self