import argparse

parser = argparse.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))
