discover a bluetooth printer and send it a CLI argument message to print

bluetooth_printer.py

import bluetooth
import sys

if len(sys.argv) != 2:
    print(f"usage: {sys.argv[0]} <message>")
    sys.exit(1)

message = sys.argv[1]

nearby_devices = bluetooth.discover_devices(
    duration=8, lookup_names=True, flush_cache=True, lookup_class=False
)
for addr, name in nearby_devices:
    if name and "printer" in name.lower():
        try:
            sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
            sock.connect((addr, 1))
            sock.send(message + "\n\n\n")
            sock.close()
        except Exception as e:
            print("could not connect to printer: %s" % e)