How to use the lastversion.__about__.__version__ function in lastversion

def __init__(self):
        super(ProjectHolder, self).__init__()
        self.headers.update({'User-Agent': 'lastversion/{}'.format(__version__)})
        log.info('Using {} project holder'.format(type(self).__name__))
        self.branches = None

help='Returns assets download URLs for last release')
    parser.add_argument('--source', dest='source', action='store_true',
                        help='Returns only source URL for last release')
    parser.add_argument('-gt', '--newer-than', type=check_version, metavar='VER',
                        help="Output only if last version is newer than given version")
    parser.add_argument('-b', '--major', metavar='MAJOR',
                        help="Only consider releases of a specific major "
                             "version, e.g. 2.1.x")
    parser.add_argument('--filter', metavar='REGEX', help="Filters --assets result by a regular "
                                                          "expression")
    parser.add_argument('-su', '--shorter-urls', dest='shorter_urls', action='store_true',
                        help='A tiny bit shorter URLs produced')
    parser.add_argument('-y', '--assumeyes', dest='assumeyes', action='store_true',
                        help='Automatically answer yes for all questions')
    parser.add_argument('--version', action='version',
                        version='%(prog)s {version}'.format(version=__version__))
    parser.set_defaults(validate=True, verbose=False, format='version',
                        pre=False, assets=False, newer_than=False, filter=False,
                        shorter_urls=False, major=None, ssumeyes=False)
    args = parser.parse_args()

    if args.repo == "self":
        args.repo = "dvershinin/lastversion"

    if args.verbose:
        log.basicConfig(format="%(levelname)s: %(message)s", level=log.DEBUG)
        log.info("Verbose output.")
    else:
        log.basicConfig(format="%(levelname)s: %(message)s")

    if args.assets:
        args.format = 'assets'