How to use the svglib.svglib.__version__ function in svglib

p.add_argument('-o', '--output',
        metavar='PATH_PAT',
        help='Set output path (incl. the placeholders: dirname, basename,'
             'base, ext, now) in both, %%(name)s and {name} notations.'
    )

    line_filter_default = u''
    p.add_argument('input',
        metavar='PATH',
        nargs='*',
        help='Input SVG file path with extension .svg or .svgz.')

    args = p.parse_args()

    if args.version:
        print(svglib.__version__)
        sys.exit()

    if not args.input:
        p.print_usage()
        sys.exit()

    paths = [a for a in args.input if exists(a)]
    for path in paths:
        convert_file(path, outputPat=args.output)

def cli_main():
    args = dict(
        prog=basename(sys.argv[0]),
        version=svglib.__version__,
        author=svglib.__author__,
        license=svglib.__license__,
        copyleft_year=svglib.__date__[:svglib.__date__.find('-')],
        ts_pattern="{{dirname}}/out-"\
                   "{{now.hour}}-{{now.minute}}-{{now.second}}-"\
                   "%(base)s",
    )
    if args['prog'].endswith('2ps'):
        args['ext'] = 'eps'
    elif args['prog'].endswith('2pdf'):
        args['ext'] = 'pdf'
    elif args['prog'].endswith('2pm'):
        args['ext'] = 'pm'
    args['ext_caps'] = args['ext'].upper()
    args['ts_pattern'] += ('.%s' % args['ext'])
    desc = '{prog} v. {version}\n'.format(**args)