I've done it for filling only. PVC tee with threaded ends to go inline from the 1/4 turn ball valve on the wall to the supply line for the faucet.
Then on the branch side of the tee have a valve and a Barb fitting or whatever your fill hose needs.
It's not pretty but it works.
Never had a python but I'm assuming it won't work since you need run water through the it.