Can not print to Sharp multi-function printer

Do 'auto-configuration'.
'Ports' > 'Configure Port'. Change Protocol from 'Raw' into 'LPR'. Enter 'lp' in 'LPR Settings/Queue Name'. OK.
Can print now.

If seeing error, e.g. 'the port is being used', etc., then restart computer. Do the above steps again.
Can print now.

Where to put those of my functions, which can be imported as modules, on a specific path, so I can easily import them?

https://stackabuse.com/creating-and-importing-modules-in-python/

import sys

sys.path.append('~/???')