text: #!/usr/bin/env python
  import rospy
  from std_msgs.msg import String
  
  def the_listener(the_talk):
  	the_heard_talk = the_talk.data
  	rospy.loginfo("Heard what : %s", the_heard_talk)
  
  def the_controller(): # or the_looper/spinner
  	rospy.init_node('my_node', anonymous=True)
  	rospy.Subscriber("the_talker", String, the_listener)
  	rospy.spin()
  
  if __name__ == '__main__':
  	the_controller()
  