Send bytes given on the command line as hexadecimal digit pairs to selected MIDI output

sendsyx.py

#!/usr/bin/env python3
import sys
from rtmidi.midiutil import open_midioutput
if sys.argv[1:]:
    midiout, _ = open_midioutput()
    midiout.send_message(bytearray.fromhex(" ".join(sys.argv[1:])))