save project

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    name = input("\n请输入用户账号_")
+    password = input("请输入账号密码_")
+    if name == username and password == userpassword:
+        print("\n登录成功!")
+        break
+    elif name!=username:
+        print("\n用户账号错误,请重新输入")
+    elif password!=userpassword:
+        print("\n账号密码错误,请重新输入")
+print("欢迎来到贝尔编程!")
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