bus-path-by-name.py

import argparse
import re
import subprocess

argument_parser = argparse.ArgumentParser()
argument_parser.add_argument('name')

LSUSB_PATTERN = re.compile(
    r'Bus (?P<bus>\d{3}) Device (?P<device>\d{3}): ID (?P<id>[a-z0-9]{4}:[a-z0-9]{4}) (?P<name>.*)')


def udevadm_get_properties(name):
    output = subprocess.run(
        ['udevadm', 'info', '-n', name, '-q', 'property'], stdout=subprocess.PIPE,
        universal_newlines=True)
    return dict(line.split('=', 1) for line in output.stdout.splitlines())


def lsusb():
    output = subprocess.run(['lsusb'], stdout=subprocess.PIPE, universal_newlines=True)
    return [LSUSB_PATTERN.match(line).groupdict() for line in output.stdout.splitlines()]


def main(arguments):
    properties = udevadm_get_properties(arguments.name)
    query_id = '{}:{}'.format(properties['ID_VENDOR'], properties['ID_MODEL'])
    lsusb_by_id = {device['id']: device for device in lsusb()}
    device = lsusb_by_id[query_id]
    print('/dev/bus/usb/{}/{}'.format(device['bus'], device['device']))


if __name__ == '__main__':
    arguments = argument_parser.parse_args()
    argument_parser.exit(main(arguments))