docs: def run_guest():
      """
      A sample for quickly deploy and start a virtual guest.
      """
  
      # user input the properties of guest, image and network.
      _user_input_properties()
  
      # run a guest.
      _run_guest(GUEST_USERID, IMAGE_PATH, IMAGE_OS_VERSION, GUEST_PROFILE, 
                 GUEST_VCPUS, GUEST_MEMORY, NETWORK_INFO, VSWITCH_NAME, DISKS_LIST)