save project

diy2.py

+ i=3
 username = "python"
+
 userpassword = "123456"
 while True:
+    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
     print("用户名和密码错误!请重新输入")
-while True:
     if  name != username :
         print("用户名错误!请重新输入")
     elif :
         print("密码错误!请重新输入")
-
+    elif :
+        print("错误")
+exit()        
 print("欢迎来到贝尔编程!")
\ No newline at end of file