save project

diy2.py

+i=3
 username = "python"
 userpassword = "123456"
 while True:
+    if i > 0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
+        i-=1
         if name == username and password == userpassword:
             print("登录成功!")
             break
         if name!=username:
             print("用户名不存在，请重新输入")
-    else:
-    
+        if password!=userpassword:
             print("密码有误，请重新输入")
+    else:
+        print("账号已被冻结")
+        exit()