How do I add python3 kernel to jupyter (IPython)
My Jupyter
notebooks installed with python 2
kernel. I do not understand why. I might have messed something up when I did the install. I already have python 3
installed. How can I add it to Jupyter
? Here's a screenshot of what the default Jupyter
insalled with python3 -m install jupyter
and opened in the browser with jupyter notebook
looks like:
Make sure you have ipykernel
installed and use ipython kernel install
to drop the kernelspec in the right location for python2. Then ipython3 kernel install
for Python3. Now you should be able to chose between the 2 kernels regardless of whether you use jupyter notebook
, ipython notebook
or ipython3 notebook
(the later two are deprecated).
Note that if you want to install for a specific Python executable you can use the following trick:
path/to/python -m ipykernel install <options>
This works when using environments (venv,conda,...) and the <options>
let you name your kernel (see --help
). So you can do
conda create -n py36-test python=3.6
source activate py36-test
python -m ipykernel install --name py36-test
source deactivate
And now you get a kernel named py36-test
in your dropdown menus, along the other ones.
See Using both Python 2.x and Python 3.x in IPython Notebook which has more recent information.
This worked for me on Ubuntu 16.04:
python2 -m pip install ipykernel
python2 -m ipykernel install --user
python3 -m pip install ipykernel
python3 -m ipykernel install --user
Reference to the documentation:
Kernels for Python 2 and 3. Installing the IPython kernel - IPython Docs.
pip install -U jupyter
pip3 install jupyter
ipython3 kernelspec install-self