三级菜单实例

import json

xxl = {'北京': {'天安': {"东京": ["尸体", "大多数已经腐烂！"], "伟人": ["红旗", "升旗仪式！"]},
'长城': {"地狱": ["恶魔", "种类多，各种奇葩都有！"], "天使": ["坠落", "翅膀毛掉光了！"]},
'堵车': {'堵车': ["车多", "还不如两条腿走！"], '加塞': ["拥挤", "捞出车祸！"]}},
'江苏': {'无锡': {'荟聚': ["吃喝", "购物休闲好地方！"]}, '常州': {'恐龙': ["侏罗纪", "体验恐龙时代"]}, '苏州': {'sbs': ["电视", "电视塔新建在南施街地铁口附近"]}},
'广东': {}, }

while True:
for i in xxl:
print(i)
choise = input("按d退出程序或者选择进入1》：")
if choise in xxl:
while True:
for i2 in xxl[choise]:# 打印每层的key
print("\t", i2)
choise2 = input("选择进入2》：")
if choise2 in xxl[choise]:
while True:
for i3 in xxl[choise][choise2]:
print("\t\t", i3)
choise3 = input("选择进入3》：")
if choise3 in xxl[choise][choise2]:
for i4 in xxl[choise][choise2][choise3]:
print("\t\t", i4)
choise4 = input("最后一层，按b返回》：")
if choise4 == "b":
pass
if choise3 == "b": # 结束当前层的循环
break
if choise2== "b":
break
if choise == "b":
break
if choise == "d":
f = open("dic.json", 'w', encoding="utf-8")
json.dump(xxl, f)
break