How to solve cannot import name GazeboModel? [closed]

edit

When I run this script:

  #!/usr/bin/env python
  # 
  #  testing, do not use 
  # 
  #
  # spawning things "in sequence"
  #
  # This quick hack waits for a topic to be published (presumably by the model we are waiting for)
  # then it accesses the factory service exposed by gazebo_ros_factory plugin for spawning models
  #
  # a better way to do this is by specifying
  # a list of model spawning dependencies, i.e. don't spawn cup unless table is present
  # to do this, we must make gazeob expose
  #   * service call to access all models
  #   * service call to access info about each model
  #   * service call to ping, create, kill, modify (pose) models
  # I guess one can construct this similar to rostopic or rosnode

  import roslib, time
  roslib.load_manifest('gazebo_plugins')

  import rospy, sys
  import string
  import math

  from gazebo_plugins import gazebo_plugins_interface
  from gazebo_plugins.msg import GazeboModel
  from geometry_msgs.msg import Pose, Point, Quaternion
  import tf.transformations as tft

  wait_topic_initialized = False
  def usage():
      print '''Commands:
      wait_spawn.py <param name> <model name> <namespace> <topic name> <initial pose: x y z R P Y>
      '''
      sys.exit(1)

  def waitForTopic(any):
      global wait_topic_initialized
      wait_topic_initialized = True

  if __name__ == "__main__":
      global wait_topic_initialized
      print len(sys.argv) 
      if len(sys.argv) < 11:
          print usage()

      rospy.init_node("spawn_wait", anonymous=True)

It shows:

  sam@sam:~/code/ros/plug/pr2_plugs_gazebo_demo$ /home/sam/code/ros/plug/pr2_plugs_gazebo_demo/scripts/wait_spawn.py plug_description plug plug base_pose_ground_truth 0.09 0.0 0.31 0.0 1.57 0.0 __name:=spawn_plug __log:=/home/sam/.ros/log/93369d2e-440b-11e2-98a0-e0b9a5f829db/spawn_plug-4.log
  /home/sam/code/ros/plug/pr2_plugs_gazebo_demo/scripts/wait_spawn.py:43: SyntaxWarning: name 'wait_topic_initialized' is assigned to before global declaration
    global wait_topic_initialized
  Traceback (most recent call last):
    File "/home/sam/code/ros/plug/pr2_plugs_gazebo_demo/scripts/wait_spawn.py", line 26, in <module>
      from gazebo_plugins import gazebo_plugins_interface
    File "/opt/ros/fuerte/stacks/simulator_gazebo/gazebo_plugins/src/gazebo_plugins/gazebo_plugins_interface.py", line 9, in <module>
      from gazebo_plugins.msg import GazeboModel
  ImportError: cannot import name GazeboModel
  sam@sam:~/code/ros/plug/pr2_plugs_gazebo_demo$

I found that it seems a line failed:

  from gazebo_plugins.msg import GazeboModel

I also find the script has the same problem:

   /opt/ros/fuerte/stacks/simulator_gazebo/gazebo_plugins/scripts/gazebo_model

How to solve it?

Thank you~