save project

diy2.py

 username = "123456"
 userpassword = "123456"
+i = 3
 while True:
     name = input("请输入用户名:")
     password = input("请输入密码:")
+    i-=1
     if name == username:
          if password == userpassword:
           print("登录成功!")
@@ -10,5 +12,7 @@ while True:
          else:
           print("密码错误!")
     else:    
-       print("用户名和密码错误!请重新输入")
-print("欢迎到贝尔编程!")
\ No newline at end of file
+       print("用户不存在!")
+    if i ==0:
+       print("账号已被锁定!")
+       exit()
\ No newline at end of file