Get flux Python package from path to flux executable

[jameshcorbett]

As part of my Parsl work I'm trying to drive a Flux instance remotely. If I could import the flux python package into my Python environment, I would be good to go. I can fetch the URI from the instance and connect to it that way. However, I don't know how to get the Python package. (I'm used to just having the package available because an encapsulating Flux instance has set PYTHONPATH.) Is there a reliable way to find the path to the Python package, given a path to the flux executable or some other reference point? Either by querying the executable or by following a certain predefined path.

Worst case I can fetch both the URI and the path to the package from inside the instance, by checking flux.__file__.

[dongahn]

ahn1@docker-desktop:/usr/src$ flux env | grep PYTHONPATH
export PYTHONPATH="/usr/lib/flux/python3.6"

[dongahn]

How flux constructs PYTHONPATH is also documented in https://flux-framework.readthedocs.io/projects/flux-core/en/latest/man1/flux.html