IPython Notebook ipywidgets does not show
With the new version of ipywidgets, I ran into this problem, but then I found on their github readme that you now need to follow
pip install ipywidgetswith
jupyter nbextension enable --py widgetsnbextensionThat cleared the problem up for me.
After googling for a while without hope, I realized that I need
jupyter labextension install @jupyter-widgets/jupyterlab-manager
If you've already got [an older version] of ipywidgets installed in Jupyter and you're seeing this problem (you'll probably be seeing javascript errors in the browser console) then you need to run the install command to update the relevant files e.g.:
jupyter nbextension install --user --py widgetsnbextensionAnd you may also need to rerun the enable command e.g.:
jupyter nbextension enable --user --py widgetsnbextensionNote: the --user argument may need to be different if you're using a virtualenv or other environment - see the ipywidget docs for more details.