install ipympl in the Jupyter environment

[bruhwiler]

Request from a USPAS instructor:

---

We're in the last stretches of preparing the upcoming USPAS in Knoxville. It really is a great relief that we can still use SIREPO for the school, it helps us a lot.

Checking our notebooks again I realized that something appears to have changed in the setup of jupyter since our last school. I think I have understood the problem, and the fix in SIREPO would only take the installation of a small additional package to get things going again. Do you think you or someone from the team could do that?

Here is the technical information:

• Running our jupyter notebooks unchanged now results in an error: Javascript error: IPython is not defined (both on my local machines and on SIREPO).
• The solution is simple: in the affected notebooks replace the line %matplotlib notebook by %matplotlib ipympl
• For this to work, we need to install the ipympl package (with pip3 install ipympl). I have done that on my systems (linux and mac), and it works.

We therefore ask you to install ipympl also on the SIREPO systems.

Many thanks in advance, your help in this matter it is greatly appreciated.

---

[e-carlin]

ipympl is already installed.

jupyter$ pip show ipympl
Name: ipympl
Version: 0.8.0
Summary: Matplotlib Jupyter Extension
Home-page: http://matplotlib.org
Author: Matplotlib Development Team
Author-email: [email protected]
License: BSD License
Location: /home/vagrant/.pyenv/versions/3.9.15/envs/py3/lib/python3.9/site-packages
Requires: ipykernel, ipywidgets, matplotlib
Required-by: 

[cchall]

I think this is the same issue that's been around for a while now (radiasoft/download#515 radiasoft/jupyter_rs_radia#68). All interactive matplotlib backends are broken in our environment right now.

[e-carlin]

Thanks @cchall. Helped me see the fix.

[e-carlin]

Fixed by radiasoft/container-beamsim-jupyter-base#113