I am using this code to try to add submenus in appindicator

#!/usr/bin/env python

import gobject

import gtk

import appindicator



def clean_quit(w):

  print "in quit"

  gtk.main_quit()



    if __name__ == "__main__":

      ind = appindicator.Indicator ("example-simple-client",

                              "indicator-messages",

                              appindicator.CATEGORY_APPLICATION_STATUS)

  ind.set_status (appindicator.STATUS_ACTIVE)

  ind.set_attention_icon ("indicator-messages-new")



  # create a menu

  menu = gtk.Menu()

  listMenu=gtk.Menu()

  listItems=gtk.MenuItem("Show List")

  listItems.set_submenu(listMenu)

  inews = gtk.MenuItem("Import")

  listMenu.append(inews)

  menu.append(listItems)

  listItems.show()

  # create some

  menu_items=gtk.MenuItem("Quit")

  menu.append(menu_items)

  menu_items.connect("activate", clean_quit)

  menu_items.show()

  ind.set_menu(menu)



  gtk.main()

It's not working - what is wrong in this code?