1 name = []
 2 while True:
 3     print("="*50)
 4     print("        欢迎进入名片管理系统V1.0")
 5     print("1：添加一个名片")
 6     print("2：修改一个名片")
 7     print("3：删除一个名片")
 8     print("4：查询一个名片")
 9     print("5：退出")
10     print("="*50)
11     admin = int(input("请输入功能编号："))
12
13     if admin == 1:
14         while True:
15             new_name = input("请输入你的名字：")
16             if new_name == "返回":
17                 break
18             name.append(new_name)
19             print("=======>添加成功！")
20             print("=======>目前已添加的名字有：%s"%(name))
21             print("=======>返回菜单请输入：返回")
22     elif admin == 2:
23         while True:
24             al_name = input("请输入你要修改的名字：")
25             if al_name == "返回":
26                 break
27             if al_name in name:
28                 als_name = input("请输入新名字：")
29                 name.remove(al_name)
30                 name.append(als_name)
31                 print("=======>目前的名字有：%s" % (name))
32             else:
33                 print("您输入的名字不存在，请重新输入！")
34             print("=======>返回菜单请输入：返回")
35     elif admin == 3:
36         while True:
37             del_name = input("请输入你要删除的名字：")
38             if del_name == "返回":
39                 break
40             name.remove(del_name)
41             print("=======>删除成功！")
42             print("=======>目前已剩余的名字有：%s" % (name))
43             print("=======>返回菜单请输入：返回")
44     elif admin == 4:
45         while True:
46             look_name = input("请输入你要查询的名字：")
47             if look_name == "返回":
48                 break
49             else:
50                 if look_name in name:
51                     print("你要查询的名字存在！")
52                 else:
53                     print("查无此人！")
54             print("=======>返回菜单请输入：返回")
55     elif admin == 5:
56         break
57     else:
58         print("你的输入有误，请从新输入！")