Activate ipywidgets for JupyterLab. #505

scipy-notebook/Dockerfile

@@ -46,6 +46,8 @@ RUN conda install --quiet --yes \
     conda clean -tipsy && \
     # Activate ipywidgets extension in the environment that runs the notebook server
     jupyter nbextension enable --py widgetsnbextension --sys-prefix && \
+    # Also activate ipywidgets extension for JupyterLab
+    jupyter labextension install @jupyter-widgets/jupyterlab-manager && \
     fix-permissions $CONDA_DIR
 
 # Install facets which does not have a pip or conda package at the moment