第二天作业:
初探三级菜单,凭现有知识,注意变量可以不声明,但要提前赋值!
此处shuru = '' 可以不写,因为第7行被赋值了,如果只调用shuru不赋值就会报错
1 shuru = '' 2 sheng = ['山东', '河北'] 3 shi = ['济南', '秦皇岛'] 4 zhen = ['历下区', '秦皇区域'] 5 lie = {'a': sheng, 'b': shi, 'c': zhen} 6 while True: 7 shuru = input('请选择省?') 8 if shuru == '1': 9 print(lie['a']) 10 elif shuru == '2': 11 print(lie['b']) 12 elif shuru == '3': 13 print(lie['c'])