Week2-作业: 三级菜单

#!/usr/bin/en python
# Author:lijun

henan = {
    '郑州':{
        "金水":{
            "国贸":["360","博物馆"],
            "新通桥":["立交","市政府"]
        },
        "管城":{
            "商城":["华亿大厦","商城遗址"],
            "七里河":{"阳光城","华钻"},
            "航海路":{"中原福塔","地铁5号线"},
        },
        "经开":{},
    },
    '周口':{
        "麚邑":{},
        "淮阳":{},
        "西华":{}
    },
    '南阳':{
        "方城":{},
        "舞阳":{},
        "社旗":{},
    },
}

exit_log = False
while not exit_log:
    for i in henan:
        print(i)
    select1 = input("请输入选择1:")
    if select1 in henan:
        while not exit_log:
            for j in henan[select1]:
                print(j)
            select2 = input("请输入选择2:")
            if select2 in henan[select1]:
                while not exit_log:
                    for k in henan[select1][select2]:
                        print(k)
                    select3 = input("请输入选择3:")
                    if select3 in henan[select1][select2]:
                        while not exit_log:
                            for m in henan[select1][select2][select3]:
                                print(m)
                            select4 = input("到底了，按q退出，按b返回:")
                            if select4 == "q":
                                exit_log = True
                            elif select4 == "b":
                                break
                    elif select3 == "q":
                        exit_log = True
                    elif select3 == "b":
                        break
            elif select2 == "q":
                exit_log = True
            elif select2 == "b":
                break
    elif select1 == "q":
        exit_log = True
    elif select1 == "b":
        print("--已经是最顶层，无法返回")