$ python -m serial.tools.list_ports --help usage: list_ports.py [-h] [-v] [-q] [-n N] [regexp] Serial port enumeration positional arguments: regexp only show ports that match this regex optional arguments: -h, --help show this help message and exit -v, --verbose show more messages -q, --quiet suppress all messages -n N only output the N-th entry
これを実現しているスクリプトは以下の通り
def main(): import argparse parser = argparse.ArgumentParser(description='Serial port enumeration') parser.add_argument( 'regexp', nargs='?', help='only show ports that match this regex') parser.add_argument( '-v', '--verbose', action='store_true', help='show more messages') parser.add_argument( '-q', '--quiet', action='store_true', help='suppress all messages') parser.add_argument( '-n', type=int, help='only output the N-th entry') args = parser.parse_args() hits = 0 # get iteraror w/ or w/o filter if args.regexp: if not args.quiet: sys.stderr.write("Filtered list with regexp: {!r}\n".format(args.regexp)) iterator = sorted(grep(args.regexp)) else: iterator = sorted(comports()) # list them for n, (port, desc, hwid) in enumerate(iterator, 1): if args.n is None or args.n == n: sys.stdout.write("{:20}\n".format(port)) if args.verbose: sys.stdout.write(" desc: {}\n".format(desc)) sys.stdout.write(" hwid: {}\n".format(hwid)) hits += 1 if not args.quiet: if hits: sys.stderr.write("{} ports found\n".format(hits)) else: sys.stderr.write("no ports found\n")
