save project

ji.py

 username="python"
 userpassword="123456"
-name=input("请输入用户名：")
-password=input("请输入密码")
-if name==username and password==userpassword:
-    print("登陆成功！")
+while True:
+    name=input("请输入用户名：")
+    password=input("请输入密码")
+    if name==username and password==userpassword:
+        print("登陆成功！")
+        break
+    input("用户名错误！请重新输入")
+print("欢迎来到贝尔编程！")