save project

diy2.py

+while True:
+    username="python"
+    userpassword="123456"
+    user=input("请输入用户名:")
+    password=input("请输入密码:")
+    if user==username and password==userpassword:
+        print("登录成功!欢迎来到贝尔编程！")
+    break
+    if user!=username：
+        print("用户名输入错误!请重新输入")
+    if password!=userpassword：
+        print("密码输入错误，请重新输入！")
\ No newline at end of file