menu = {
'1.魏国':{
'1.主公':{'1.曹操':['孟德'],'2.曹丕':['子桓'],'3.曹睿':['元仲']},
'2.谋士':{'1.司马懿':['仲达'],'2.郭嘉':['奉孝'],'3.贾诩':['文和']},
'3.武将':{'1.许褚':['仲康'],'2.张辽':['文远'],'3.徐晃':['公明']}
},
'2.蜀国':{
'1.主公':{'1.刘备':['玄德 '],'2.刘禅:':['公嗣'],},
'2.谋士':{'1.诸葛亮':['孔明'],'2.庞统':['士元'],'3.徐庶':['元直']},
'3.武将':{'1.关羽':['云长'],'2.张飞':['翼德'],'3.赵云':['子龙']}
},
'3.吴国': {
'1.主公':{'1.孙权': ['仲谋 '], '2.孙策:':['伯符'], '3.孙坚:':['文台']},
'2.谋士': {'1.陆逊': ['伯言'], '2.周瑜:':['公瑾'], '3.鲁肃':['子敬']},
'3.武将': {'1.吕蒙': ['子明'], '2.甘宁:':['兴霸'], '3.太史慈':['子义']}
}
}
current_layer = menu #实现动态循环
#parrent_layer = menu
parrent_layer = [] #保存父亲级，最后一个元素永远都是父亲级别
while True:
for key in current_layer:
print(key)
choice = input(">>>").strip()
if len(choice) == 0:
continue
if choice in current_layer:
parrent_layer.append(current_layer)
current_layer = current_layer[choice]
elif choice == 'b':
if parrent_layer:
current_layer = parrent_layer.pop()
else:
print('无此项')
