prettify (introduced with 0.2.3) breaks proxy if not attached to terminal

[sl077]

I'm using this proxy with a custom docker container running on a current jupyterhub with dockerspawner.
When I try to start the matlab proxy via jupyterlab and jupyter-matlab-proxy, it keeps crashing and restarting in a loop, providing this log entry to the console:

...
Traceback (most recent call last):
  File "/opt/modules/envs/conda/20220215_matlab/bin/matlab-proxy-app", line 8, in <module>
    sys.exit(main())
  File "/opt/modules/envs/conda/20220215_matlab/lib/python3.9/site-packages/matlab_proxy/app.py", line 597, in main
    util.prettify(
  File "/opt/modules/envs/conda/20220215_matlab/lib/python3.9/site-packages/matlab_proxy/util/__init__.py", line 127, in prettify
    size = os.get_terminal_size()
OSError: [Errno 25] Inappropriate ioctl for device
...

I guess that in my setup the proxy is not connected to a tty, causing this error in os.get_terminal_size(). Removing the call to util.prettify() solves this problem for me and makes the proxy work.

Am I missing some required configuration step here, to make it work out-of-the-box?

Edit:
If it's important: System is a Debian bullseye amd64 Linux with jupyterhub 2.1.1, jupyterlab 3.2.9, jupyter-matlab-proxy 0.4.0 and matlab-proxy 0.2.3 running inside docker 5:20.10.12~3-0.

[prabhakk-mw]

Hi @sl077
Thank you for reporting the issue, this is not expected behavior.
We are actively working on a fix, and will push an update out soon!