I've found it pretty challenging to get ipywidgets to work in Jupyter notebooks running the Python 2 kernel in docker containers (for an upcoming PyCon tutorial). Is this normal? I've tried using i.e., the "RUN jupyter nbextension enable --py widgetsnbextension --sys-prefix" Dockerfile command present in some of the official docker-stacks Dockerfiles and even running that command directly in the notebook (!command) itself with python2 sourced doesn't enable the widgets. I've tried switching ipywidgets version between the 4.x and 5.x series without success. On startup, the notebook will typically indicate that either the widgets aren't installed or there will be a 404 GET on /nbextensions/widgets. The Dockerfile is in the root of the repo here (https://github.com/tylerjereddy/pycon-2016
) if you have a minute for suggestions. Thanks.