'start.
Arguments:
reset_status: `bool`. If True, `DataStatus` will be reset.
Returns:'

def start(self, reset_status=True):

    self.clear_queues()
    self.interrupted = False
    if reset_status:
        self.data_status.reset()
    bi_threads = [threading.Thread(target=self.fill_batch_ids_queue)]
    fd_threads = [threading.Thread(target=self.fill_feed_dict_queue) for i in range(self.num_threads)]
    self.threads = (bi_threads + fd_threads)
    for t in self.threads:
        t.daemon = True
        t.start()
