auto save

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+    print("用户名和密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
+if name!=username
+   print("用户名不存在,请重新输入！")
+   continue
+name=input("请输入用户名:")
+if password!=userpassword
+   paint("密码输入有误,请重新输入！")
+   continue
+i=0
+if i>3
+print("你的账号已被锁定，请带身份证来我司解锁)