注：并没有使用函数。

data = {: {: {: [, ], : [, ]}, : {}}, : {}}
exit_flag = exit_flag:
    menu1 data:
        (menu1)
    choice1 = ()
    choice1 data:
        exit_flag:
            menu2 data[choice1]:
                (, menu2)
            choice2 = ()
            choice2 data[choice1]:
                exit_flag:
                    menu3 data[choice1][choice2]:
                        (, menu3)
                    choice3 = ()
                    choice3 data[choice1][choice2]:
                        i data[choice1][choice2][choice3]:
                            (, i)
                        choice4 = ()
                        choice4 == :
                            choice4 == :
                            exit_flag = choice4 == :
                            (, )
                            exit_flag = choice4 == :
                            (, )
                            exit_flag = choice3 == :
                        choice3 == :
                        exit_flag = choice2 == :
                choice2 == :
                exit_flag = choice1 == :
        exit_flag =

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Python 三级菜单——Alex