Enabling widgets on jupyterhub for all users

Hi,

I am running jupyterhub with default local spawner installed via conda (system-wide installation). Jupyterhub is installed in its own coda-environment which also includes the single-user notebook. I provide another system environment to all users called py36-sys. I installed the ipywidgets package from conda-forge in the py36-sys environment. Still, users get an error when trying to use the widgets.

I also tried to run this command after activating the py36-sys environment:

jupyter nbextension enable --py widgetsnbextension --sys-prefix

but the error persists.

Test code:

from ipywidgets import interact

@interact(x=(0, 100, 10))
def p(x=50):
    pass

Output

Failed to display Jupyter Widget of type `interactive`.

If you're reading this message in the Jupyter Notebook or JupyterLab Notebook, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.

If you're reading this message in another frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.

[tritemio]

I solved the issue by:

1. installing ipywidgets also in the environment which holds jupyterhub (and the single-user notebook)
2. running jupyter nbextension enable --py widgetsnbextension --sys-prefix in the jupyterhub widgets
3. restarting jupyterhub

Only step 1 was not enough.

[AndriiHanenko]

I solved the issue by:

1. installing ipywidgets also in the environment which holds jupyterhub (and the single-user notebook)

2. running `jupyter nbextension enable --py widgetsnbextension --sys-prefix` in the jupyterhub widgets

3. restarting jupyterhub

Only step 1 was not enough.

True