def grep(regexp):
"""\
Search for ports using a regular expression. Port name, description and
hardware ID are searched. The function returns an iterable that returns the
same tuples as comport() would do.
"""
r = re.compile(regexp, re.I)
for info in comports():
port, desc, hwid = info
if r.search(port) or r.search(desc) or r.search(hwid):
yield info
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" % (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")
