save project

qwd.py

+username="python"
+userpassword="123456"
+while True:
+    name = input("请输入账号：")
+    if name==userpassword:
+    password = input("请输入密码：")
+    if name == username and password == userpassword:
+        print("登陆成功！")
+        print("欢迎来到贝尔编程！")
+        break
+    if name != username:
+        print("账号不存在，请重新输入！")
+        continue
+    if password != userpassword:
+        print("密码错误，请重新输入！")
+print("欢迎来到贝尔机器人编程中心！")
\ No newline at end of file