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:UsersUseranaconda3Scriptsjupyter-notebook-script.py", line 6, in 
from notebook.notebookapp import main
File "C:UsersUseranaconda3libsite-packagesnotebooknotebookapp.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

Asked By: Saifullah Khan

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Source

Answer 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

Answered By: smitty_werbenjagermanjensen

Answer 2

you said :

I’m unable to launch the Jupyter on Anaconda.

you can update it from Anaconda.Navigator

go to Anacondas’ Environments
search about tornado
remove it
4.you will find your tornado 4.5.3

click on the check then choose
make for a specific version –> 6.1
go to Anacondas’ home page then ran jupyter [install -> launch ]
done

Answered By: Almadani

Answer 3

Try uninstalling tornado with: (pip uninstall tornado)
for some reason after deleting my tornado 4.5.3 it automatically updated to Version 6. and started working perfectly fine, I don’t know the exact reason, possibly a missing dependency was auto installed I guess. whatever it is, this worked for me.

enter image description here

Answered By: Mihir Patil

Answer 4

The problem is that I already have tornado 6.2. But the error says:
ImportError: The Jupyter Notebook requires tornado >= 5.0, but you have 4.5.3.
Yesterday, it was working well. I’m not sure what happened.

Answered By: user4394598

Unable to launch Jupyter Notebook

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