How to use the tartube.info.InfoManager function in tartube

def __init__(self, app_obj, info_type, media_data_obj, url_string,
    options_string):

        if DEBUG_FUNC_FLAG:
            utils.debug_time('iop 102 __init__')

        super(InfoManager, self).__init__()

        # IV list - class objects
        # -----------------------
        # The mainapp.TartubeApp object
        self.app_obj = app_obj
        # The video for which information will be fetched (None if
        #   self.info_type is 'test_ytdl')
        self.video_obj = media_data_obj

        # This object reads from the child process STDOUT and STDERR in an
        #   asynchronous way
        # Standard Python synchronised queue classes
        self.stdout_queue = queue.Queue()
        self.stderr_queue = queue.Queue()
        # The downloads.PipeReader objects created to handle reading from the
        #   pipes