code: def do_delete_config(self, line):
          
  
          def f(p, args):
              try:
                  source = args[0]
              except:
                  print("argument error")
                  return
              print(p.delete_config(source))
  
          self._request(line, f)
docs: delete_config <peer> <source>
          eg. delete_config sw1 startup