_, queue_batch = reader.read_up_to(filename_queue, enqueue_many_size)
batch_serialized_example = tf.train.shuffle_batch([queue_batch], batch_size
    =batch_size, num_threads=thread_number, capacity=capacity,
    min_after_dequeue=min_after_dequeue, enqueue_many=True)
Benchmark of HowTo: Reading Data