Answer a question

When using a Jupyter notebook file in Visual Studio code with the Jupyter extension I receive the error The kernel failed to start due to the missing module 'ipykernel_launcher'. Consider installing this module. View Jupyter [log](command:jupyter.viewOutput) for further details.

This notebook works correctly from the JupyterLab web application when I select the same conda environment that was selected in Visual Studio Code.

pip list shows that ipykernel version 5.3.4 is installed, but I don't know how to install ipykernel_launcher. I tried reinstalling pyzmq and it didn't help.

Any ideas why this isn't working?

Answers

Had the same problem. My solution is --

First uninstall all jupyter related modules:

python3 -m pip uninstall -y jupyter jupyter_core jupyter-client jupyter-console jupyterlab_pygments notebook qtconsole nbconvert nbformat jupyterlab-widgets nbclient ipykernel ipynb

(from: https://stackoverflow.com/a/52912244/1516331)

And then reinstall ipykernel. I'm using VScode so when I run a cell, VSCode asked me to installipykernel. The following should work the same alternatively:

conda install -c conda-forge --update-deps --force-reinstall ipykernel -y