save project

diy3.py

+username = "python"
+userpassword = "123456"
+while True:
+    username1=input("输入用户名")
+    password1 = input("请输入密码:")
+    if username1=username and password1=password:
+        break
+    print("输入错误，请重新输入")
+print("换用来到贝尔编程")    
+