save project

diy2.py

+l='lby'
+b='123456'
+while True:
+    name=input("请输入用户名:")
+    password=input("请输入密码:")
+    if name ==l and password ==b:
+        print("登录成功")
+        break
+    print("用户名或密码错误，请重新登录")
+print("欢迎来到编程世界")
\ No newline at end of file