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’:{},
}
二逼青年版：
while true:
for key in menu:
print(key)
choice = input(“>>>:”)
if len(choice) == 0: continue
if choice not in menu:continue
while true:
for key2 in menu[choice]:
print(key2)
choice2 = input(“>>>:”)
if len(choice2) == 0: continue
if choice2 == “b”: break
if choice2 not in menu[choice]: continue
while true:
for key3 in menu[choice][choice2]:
print(key3)
choice3 = input(“>>>:”)
if len(choice3) == 0: continue
if choice3 == “b”: break
if choice3 not in menu[choice][choice2]: continue
while true:
for key4 in menu[choice][choice2][choice3]:
print(key4)
choice4 = input(“>>>:”)
if len(choice4) == 0: continue
if choice4 == “b”: break
if choice4 not in menu[choice][choice2][choice3]: continue
文艺青年版：
current_level = menu
last_level = []
while true:
for key in current_level:
print(key)
choice = input(“>>>:”)
if len(choice) == 0:continue
if choice == “b”:
if not last_level : break
current_level = last_level[-1]
last_level.pop()
if choice not in current_level:continue
last_level.append(current_level)
current_level = current_level[choice]
作者：terryblog：http://www.cnblogs.com/kkterry/weibo：http://weibo.com/kkterrye-mail：doubleginger@163.com欢迎转载，还请标明出处！多谢多谢！