如何安裝Jupyter解決錯誤？

Question

我是python的新手，我嘗試使用此命令安裝jupyter

sudo pip install jupyter

但是得到了

Found existing installation: tornado 3.1.1
Cannot uninstall 'tornado'. It is a distutils installed project and 
thus we cannot accurately determine which files belong to it which 
would lead to only a partial uninstall.

我知道龍卷風有多個版本，但無法修復

謝謝你的幫助

Answer 1

做pip uninstall tornado ，然后做pip install tornado==4.0.0