How to install a PIP package into Jython

That makes sense. I am completely new to Jython. I don’t even have the jython command in my path:

$ sudo -u openhab jython test_cec_command.py
sudo: jython: command not found

Do I need to configure something for this? Perhaps I should do some long reading before continuing. Perhaps you could point me to an entry point to some relevant resources (Jython related and OpenHAB specific)? That’d be great!