code: def alias(*aliases):
      
  
      def decorate(f):
          if not hasattr(f, "aliases"):
              f.aliases = []
          f.aliases += aliases
          return f
  
      return decorate
docs: Decorator to add aliases for Cmdln.do_* command handlers.
  
      Example:
          class MyShell(cmdln.Cmdln):
              @cmdln.alias("!", "sh")
              def do_shell(self, argv):
                  #...implement 'shell' command