def dfs_iter(self, include_self=False, right_to_left=True):
        return _DFSIter(self,
                        include_self=include_self,
                        right_to_left=right_to_left)
Returns the number of active threads plus the number of
dataset/ETHPy150Open openstack/taskflow/taskflow/types/tree.py/Node.dfs_iter--crossover with--dataset/ETHPy150Open JeremyOT/Toto/toto/tasks.py/TaskQueue.__len__