code: def save_graph(cn_topo, filename, showintfs=False, showaddrs=False):
      '''
      Save the topology to an image file 
      '''
      __do_draw(cn_topo, showintfs=showintfs, showaddrs=showaddrs)
      pyp.savefig(filenamef save_graph(cn_topo, filename, showintfs=False, showaddrs=False):
      '''
      Save the topology to an image file 
      '''
      __do_draw(cn_topo, showintfs=showintfs, showaddrs=showaddrs)
      pyp.savefig(filename)
docs: Save the topology to an image file