save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+    if name != username :
+        print("用户名不存在!")
+        continue
+    if password != userpassword:
+        print("密码不正确!!!!")
+print("大哥大哥欢迎你,欢迎你来到我这里————贝尔编程!")