save project

denglu.py

+username = "python"
+password = "12345"
+while True:
+    user = input("请输入用户名：")
+    userpass = input("请输入密码：")
+    if user != username:
+        print("用户名错误请重新输入：")
+    if userpass != password:
+        print("密码错误,请重新输入密码：")
+    if user == username and password == userpass:
+        print("登录成功！")
+        break
+print("欢迎来到贝尔编程世界")
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