Jupyter Notebook error Traceback (most recent call last):

Question

I am new to programming but want to use the Jupyter Notebook tool. When I try to open it in Terminal (I use ~ usr$ jupyter notebook command), an error shows up with the following message (taken from Terminal):

Traceback (most recent call last):
  File "/Users/usr/anaconda3/bin/jupyter-notebook", line 7, in <module>
    from notebook.notebookapp import main
  File "/Users/usr/anaconda3/lib/python3.6/site-packages/notebook/notebookapp.py", line 45, in <module>
    ioloop.install()
  File "/Users/usr/anaconda3/lib/python3.6/site-packages/zmq/eventloop/ioloop.py", line 210, in install
    assert (not ioloop.IOLoop.initialized()) or \
AttributeError: type object 'IOLoop' has no attribute 'initialized'

Does anyone know how to solve this? I am just looking for the localhost to open Jupyter Notebook in my Chrome browser.

Thanks in advance!

See this issue on their github: https://github.com/jupyter/notebook/issues/3407 — Dimitris Fasarakis Hilliard, May 12 '18 at 19:00
Try opening Jupiter from the anaconda-navigator. if it's not working try to reinstall anaconda or read the user guide. — Avi Levin, May 12 '18 at 19:09
I think I answered this a while ago. You can find the link [here](https://stackoverflow.com/questions/49141525/install-jupyter-notebook-on-miniconda/49142898#49142898). — nitred, May 12 '18 at 21:10

martins · Answer 1 · 2018-05-14T11:07:40.013

4

Thank you all,

On top of what @Jim Fasarakis Hilliard or @nitred suggested, I finally made it work by updating all packages (instead of downgrading tornado). As I use conda to download all packages, just typed conda update --all and Jupyter Notebook worked. One of the updates was precisely the "tornado" package, so probably this did the trick.

Thanks again!

edited May 14 '18 at 11:07

answered May 12 '18 at 21:24

martins

441
1
5
19

Jupyter Notebook error Traceback (most recent call last):

1 Answers1

Linked