save project

diy1.py

 username="python"
 username="python"
 userpassword="123456"
 userpassword="123456"
-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")
+while True
+    name=input("请输入用户名")
+    password=input("请输入密码:")
+    if name==username and password==userpassword:
\ No newline at end of file
+         print("登录成功")
+         break
+    print("用户名和密码错误!请重新输入")
+print("欢迎来到贝尔编程!")