所以我正在尝试制作一个Reddit机器人，所以我必须安装praw。问题是我不断收到此错误消息：
matplotlib 1.3.1 requires nose, which is not installed.
matplotlib 1.3.1 requires tornado, which is not installed.
matplotlib 1.3.1 has requirement numpy>=1.5, but you'll have numpy 1.8.0rc1 which is incompatible.
当我尝试安装nose和tornado时，它们也会失败，那么我应该做什么或者我应该放弃？