How to get ipywidgets working in Jupyter Lab?

Question

In Jupyter Notebook, ipywidgets work fine, however they seem to not work in Jupyter Lab (which is supposedly better than Notebook).

I followed these directions.

Answer 1

I had the same pbm, and tried this solution (hope it can help others):

The jupyter labextension install @jupyter-widgets/jupyterlab-manager gave this kind of error in my case:

> /Users/user/.nvm/versions/node/v8.7.0/bin/npm pack @jupyter-widgets/jupyterlab-manager
jupyter-widgets-jupyterlab-manager-0.35.0.tgz

Errored, use --debug for full output:
ValueError:
"@jupyter-widgets/jupyterlab-manager@0.35.0" is not compatible with the current JupyterLab
Conflicting Dependencies:
JupyterLab              Extension            Package
>=0.15.4-0 <0.16.0-0    >=0.16.0-0 <0.17.0-0 @jupyterlab/application
>=1.1.4-0 <2.0.0-0      >=2.0.0-0 <3.0.0-0   @jupyterlab/services
>=0.15.4-0 <0.16.0-0    >=0.16.0-0 <0.17.0-0 @jupyterlab/rendermime
>=0.15.4-0 <0.16.0-0    >=0.16.0-0 <0.17.0-0 @jupyterlab/notebook

Then, what I did is to use a previous version 0.34 instead of 0.35: jupyter labextension install @jupyter-widgets/jupyterlab-manager@0.34

In fact, according to this, sometime teams get time to consider the last version.

UP (according to comments): You can check jupyter lab --version and find match on its version compatibility.

And it works now !