How to use the justext.__version__ function in jusText

stopwords_high = STOPWORDS_HIGH_DEFAULT
    max_link_density = MAX_LINK_DENSITY_DEFAULT
    max_heading_distance = MAX_HEADING_DISTANCE_DEFAULT
    encoding = None
    default_encoding = DEFAULT_ENCODING
    force_default_encoding = False
    enc_errors = DEFAULT_ENC_ERRORS

    try:
        for o, a in opts:
            if o in ("-h", "--help"):
                print(usage())
                sys.exit(0)
            if o in ("-V", "--version"):
                print("%s: jusText v%s\n\nCopyright (c) 2011 Jan Pomikalek " % (
                    os.path.basename(sys.argv[0]), VERSION))
                sys.exit(0)
            elif o == "--list-stoplists":
                print("\n".join(get_stoplists()))
                sys.exit(0)
            elif o == "-o":
                try:
                    fp_out = codecs.open(a, 'w', 'utf8')
                except IOError as e:
                    raise JustextInvalidOptions(
                        "Can't open %s for writing: %s" % (a, e))
            elif o == "-s":
                if a.lower() == 'none':
                    stoplist = set()
                else:
                    if os.path.isfile(a):
                        try: