Python简单实现多级菜单

1 1 # -*- coding: utf-8 -*-
2 2 # @Time    : 2018-06-01 13:40
3 3 # @Author  : 超人
4 4 # @Email   : huxiaojiu111@gmail.com
5 5 # @File    : 简单实现多级菜单功能 (输入s返回首菜单,输入b返回上一菜单,输入o终止程序)
6 6 # @Software: PyCharm
7 7 
8 8 current_layer = menu#字典,多级菜单
9 9 parent_layers=[]
1010 while True:
1111     for key in current_layer:
1212         print(key)
1313     choice = input('>>>>>>>>>>>').strip()
1414     if len(choice) == 0: continue
1515     if choice in current_layer:
1616         # print(choice)
1717         parent_layers.append(current_layer)
1818         current_layer = current_layer[choice]
1919     elif choice == "b":
2020         if not len(parent_layers)==0:
2121             current_layer = parent_layers.pop()
2222         else:
2323             current_layer=menu
2424     elif choice =="s":
2525         current_layer = menu
2626     elif choice == "o":
2727         break
2828     else:
2929         print('没有此选项,重新输入'.center(50,"-"))