save project

diy1.py

 username="python"
 userpassword="123456"
-name=input("输入密码")
-password==input("请输入密码:")
-if name==username and password == userpassword:
+while True:
+    name=input("输入密码")
+    password==input("请输入密码:")
+    if name==username and password == userpassword:
         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")
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