save project

diy1.py

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