[JupyterHub] Debugging make_preexec_fn within jupyterhub-singleuser

[David Doherty]

I've created a custom spawner that copies some Tutorial notebooks into a new user's notebook directory to help them get up and running with our tools.

However I am getting an exception when I try to run the function I made in make_preexec_fn. However, I'm having trouble debugging it. Does this get run by the jupyter-singleuser process? Any pointers into how to see the logs of that process and generally debug?

I'm using the latest jupyterhub version

Thanks,

Dave