import argparse
import sys

def main(args=sys.argv[1:]):
    parser = argparse.ArgumentParser(prog="test")
    parser.add_argument('--testers', default='alice', nargs='*',
            metavar='TESTER')

    parsed_args = parser.parse_args()
    print parsed_args.testers
    print ("I expect that python test.py --teste will bring up the help"
           "message but instead it tries to set the testers arg")

if __name__ == '__main__':
    main()