シーン全体をトラバースしてオブジェクト名とapiTypeと親がいくつか（depthと言う）を出力する

traverse_OpenMana.py

# -*- coding: utf-8 -*-
import maya.OpenMaya as om


def traverse_all():
    dag_iter = om.MItDag( om.MItDag.kDepthFirst, om.MFn.kInvalid)
    dag_node_fn = om.MFnDagNode()

    while not dag_iter.isDone():

        dag_object = dag_iter.currentItem()

        depth = dag_iter.depth()

        dag_node_fn.setObject( dag_object )

        name = dag_node_fn.name()

        print '%s (%s) depth: %d'%(name, dag_object.apiTypeStr(), depth)

        dag_iter.next()