Unable to launch Jupyter Notebook

Question

I'm unable to launch the Jupyter on Anaconda. I'm using windows, how can I get rid of this error? The error says:

Traceback (most recent call last):
File "C:\Users\User\anaconda3\Scripts\jupyter-notebook-script.py", line 6, in 
from notebook.notebookapp import main
File "C:\Users\User\anaconda3\lib\site-packages\notebook\notebookapp.py", line 64, in 
raise ImportError(_("The Jupyter Notebook requires tornado >= 5.0, but you have %s") % tornado.version)
ImportError: The Jupyter Notebook requires tornado >= 5.0, but you have 4.5.3

Solution 1

You can probably remove it off your system then put it back on with for python

sudo apt-get remove python-tornado
sudo pip install tornado

similarly you could run it for python 3 if neccesary

sudo apt-get remove python3-tornado
sudo pip3 install -U tornado

or you could try the following to upgrade tornado

sudo pip install tornado --upgrade

Solution 2

you said :

I'm unable to launch the Jupyter on Anaconda.

you can update it from Anaconda.Navigator

1. go to Anacondas' Environments
2. search about tornado
3. remove it 4.you will find your tornado 4.5.3

5. click on the check then choose

6. make for a specific version --> 6.1

7. go to Anacondas' home page then ran jupyter [install -> launch ] done

Comments

[DaveL17]

The error explains what the problem is that you're encountering. You'll need to upgrade your version of tornado to at least v5.0.

[Saifullah Khan]

How can I upgrade to version 5.0? is it possible with Anaconda Prompt Powershell?

[DaveL17]

Perhaps this will help you (I found this with Google; I don't use Windows).

[smitty_werbenjagermanjensen]

Awesome glad it helped :D