Starting the ipython notebook

Question

In an ubuntu terminal window when the notebook is starting this error is raised. Could anybody explain this error

KeyError: 3
ERROR:root:Exception in I/O han         


        

Answer 1

I had to upgrade pyzmq to get it working:

sudo pip install pyzmq --upgrade

If the problem still persists try upgrading the rest of the libraries which are:

sudo pip install jinja2
sudo pip install tornado

If you don't wanna be messing around with these libraries you could run a virtual environment and install everything there. Here is the documentation: http://docs.python-guide.org/en/latest/dev/virtualenvs/

Hope it helps, cheers!