Parsing command-line options

command_line_parser.py

from argparse import ArgumentParser

parser = ArgumentParser(description="Process some integers")

parser.add_argument('integers', metavar='N', type=int, nargs='+',
                    help="an integer for the accumulator")

parser.add_argument('--sum', dest='accumulate', action='store_const',
                    const=sum, default=max,
                    help='sum the integers (default find the max)')

args = parser.parse_args()

print args.accumulate(args.integers)

# python command_line_parser.py --help to usage