save project

diy2.py

+
+i=3
 username = "python"
 userpassword = "123456"
-while True:
+if i>0:
+    while True:
         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
+    if name!=username
         print("用户名不存在，请重新输入")
-else:
+    else:
         password!=userpassword
         print("密码错误，请重新输入")
-print("欢迎来到贝尔编程!")bre
\ No newline at end of file
+else:
+    print()
+print("欢迎来到贝尔编程!")
+