def METHOD_NAME(self, parser):
    parser.add_argument('key', help='contest key')
    parser.add_argument('output', help='output XML file')
    parser.add_argument('--medal',
                        help='the last integer rank (position) in the contest which will be '
                        'awarded Gold, Silver, and Bronze medals respectively',
                        nargs=3,
                        default=[4, 8, 12],
                        metavar=('lastGold', 'lastSilver', 'lastBronze'))