save project

qwe.py

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