import cmd


class HelloWorld(cmd.Cmd):

    prompt = 'prompt: '
    intro = "Simple command processor example."

    doc_header = 'doc_header'
    misc_header = 'misc_header'
    undoc_header = 'undoc_header'

    ruler = '-'

    def do_prompt(self, line):
        "Change the interactive prompt"
        self.prompt = line + ': '

    def do_EOF(self, line):
        return True


if __name__ == '__main__':
    HelloWorld().cmdloop()
