How to use the ipwb.util.isDaemonAlive function in ipwb

def checkArgs_index(args):
    if not ipwbUtil.isDaemonAlive():
        sys.exit()
    encKey = None
    compressionLevel = None
    if args.e:
        encKey = ''
    if args.c:
        compressionLevel = 6  # Magic 6, TA-DA!

    indexer.indexFileAt(args.warcPath, encKey, compressionLevel,
                        args.compressFirst, outfile=args.outfile,
                        debug=args.debug)

def show_uri(path, datetime=None):
    global IPFS_API

    if not ipwbUtils.isDaemonAlive(ipwbUtils.IPFSAPI_MUTLIADDRESS):
        errStr = ('IPFS daemon not running. '
                  'Start it using $ ipfs daemon on the command-line '
                  ' or from the <a href="/">'
                  'IPWB replay homepage</a>.')
        return Response(errStr, status=503)

    path = getCompleteURI(path)
    cdxjLine = ''
    try:
        surtedURI = surt.surt(
                     path, path_strip_trailing_slash_unless_empty=False)
        indexPath = ipwbUtils.getIPWBReplayIndexPath()

        searchString = surtedURI
        if datetime is not None:
            searchString = surtedURI + ' ' + datetime

def generateDaemonStatusButton():
    text = 'Not Running'
    buttonText = 'Start'
    if ipwbUtils.isDaemonAlive():
        text = 'Running'
        buttonText = 'Stop'

    statusPageHTML = ''.format(buttonText)
    statusPageHTML += (''
                       ''
                       ''
                       ''
                       '')
    buttonHTML = '<span id="status">{0}</span>'.format(text)
    buttonHTML += '<button id="daeAction">{0}</button>'.format(buttonText)

    footer = ''
    return Response('{0}{1}{2}'.format(statusPageHTML, buttonHTML, footer))

def start(cdxjFilePath, proxy=None):
    hostPort = ipwbUtils.getIPWBReplayConfig()
    app.proxy = proxy

    if not hostPort:
        ipwbUtils.setIPWBReplayConfig(IPWBREPLAY_HOST, IPWBREPLAY_PORT)

    if ipwbUtils.isDaemonAlive():
        ipwbUtils.setIPWBReplayIndexPath(cdxjFilePath)
        app.cdxjFilePath = cdxjFilePath
    else:
        print('Sample data not pulled from IPFS.')
        print('Check that the IPFS daemon is running.')

    # Perform checks for CDXJ file existence, TODO: reuse cached contents
    app.cdxjFileContents = getIndexFileContents(cdxjFilePath)

    try:
        print('IPWB replay started on http://{0}:{1}'.format(
            IPWBREPLAY_HOST, IPWBREPLAY_PORT
        ))
        app.run(host='0.0.0.0', port=IPWBREPLAY_PORT)
    except gaierror:
        print('Detected no active Internet connection.')