在MAC上找不到AWS CLI命令

Question

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这篇文章末尾的屏幕截图包含了所有错误。我有一个旧的Python 2.7安装和一个新的Python 3.6。 AWS指令中包含pip3，长话短说，aws命令不起作用，我已经多次遵循amazon site on how to get it to work的指令。我使用.bash_profile搞砸了很多，试图按照我在stackoverflow上找到的解决方案没有成功。

感谢您的帮助。如果我需要用更多的东西补充这篇文章，请告诉我。这是我的第一个堆栈溢出帖子。

screencapture of problem