menu ={}
menu = {"1":{},"2":{},"3":{}}
menu = {"1":
{"11":{},"12":{},"13":{}}
,"2":{}
,"3":{}}
就是每个value的格式和menu的格式是一样的
for i in menu: print(i) chose = input(">>")
if chose in menu: menu = menu[chose]
while True: for i in menu: print(i) chose = input(">>") if chose in menu: menu = menu[chose]
要实现返回的功能我提供的是 通过另一个 变量来记录之前访问过的路径
list = [] while True: for i in menu: print(i) chose = input(">>") if chose in menu: list.append(menu) menu = menu[chose]
map = menu list = [] while True: for i in menu: print(i) chose = input(">>") if chose in menu: list.append(map) menu = menu[chose] if chose == ‘b‘: if list == []: map = menu else: map = list[len(list)-1] list.pop()
map = menu history = [] while True: for i in menu: print(i) chose = input(">>") if chose in menu: list.append(map) menu = menu[chose] if chose == ‘b‘: if list == []: map = menu else: map = list[len(list)-1] list.pop() if chose == ‘q‘: print("再见!") break
map = menu list = [] while True: for i in map: print(i) chose = input("请输入查询的地区名字:") if chose in map: if len(map[chose])==0: print("没有内容了, 请返回上一层..") list.append(map) map = map[chose] if chose == ‘b‘: if list == []: map = menu else: map = list[len(list)-1] list.pop() if chose == ‘q‘: print("再见!") break
#!/usr/bin/env python3 # -*- coding: utf-8 -*- menu = { ‘北京‘:{ ‘海淀‘:{ ‘五道口‘:{ ‘soho‘:{}, ‘网易‘:{}, ‘google‘:{} }, ‘中关村‘:{ ‘爱奇艺‘:{}, ‘汽车之家‘:{}, ‘youku‘:{}, }, ‘上地‘:{ ‘百度‘:{}, }, }, ‘昌平‘:{ ‘沙河‘:{ ‘老男孩‘:{}, ‘北航‘:{}, }, ‘天通苑‘:{}, ‘回龙观‘:{}, }, ‘朝阳‘:{}, ‘东城‘:{}, }, ‘上海‘:{ ‘闵行‘:{ "人民广场":{ ‘炸鸡店‘:{} } }, ‘闸北‘:{ ‘火车战‘:{ ‘携程‘:{} } }, ‘浦东‘:{}, }, ‘山东‘:{}, } print("=====欢迎查询地区地图=====") map = menu list = [] while True: for i in map: print(i) chose = input("请输入查询的地区名字:") if chose in map: if len(map[chose])==0: print("没有内容了, 请返回上一层..") list.append(map) map = map[chose] if chose == ‘b‘: if list == []: map = menu else: map = list[len(list)-1] list.pop() if chose == ‘q‘: print("再见!") break
原文：http://www.cnblogs.com/weihuchao/p/6647215.html
