save project

diy2.py

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