如何将tf.write_file与tf.data.Dataset.interleave一起使用？

Question

这是我编写的用于预处理图像的代码。如果我运行它，则不会创建该文件。我究竟做错了什么？ tf.write_file op不是计算图的一部分吗？这是我编写的代码的片段。希望您能在这里理解问题。

def _parse_function(filename, ofile):
    tf.Print(ofile,[ofile])
    image_string = tf.read_file(filename)
    image_decoded = tf.image.decode_jpeg(image_string,channels=3)
    image_resized = tf.image.resize_images(image_decoded, [400, 400])/255.0
    image_resized = tf.image.convert_image_dtype(image_resized, tf.uint8)
    image_encode = tf.image.encode_jpeg(image_resized)
    tf.write_file(ofile, image_encode)
    return tf.data.Dataset.from_tensor_slices(([image_encode],[ofile]))
    #return (image_resized,label)

def getDataSet(impaths,opaths):
    dataset = tf.data.Dataset.from_tensor_slices((impaths,opaths))
    dataset = dataset.interleave(_parse_function,32,32)
    batched_dataset = dataset.batch(600)
    return batched_dataset

........some code.......

with open(self.image_labels_path, 'r') as f:
        lines = f.readlines()
    dt = [x.strip().split(",") for x in lines]
    images = []
    opaths = []
    for x,y in dt:
        pt = os.path.join(self.image_dir ,'image_' +  x + '.jpg')
        if y =='True':
            opt = os.path.join(self.out_dir ,'logo/' +  x + '.jpg')
        if y =='False':
            opt = os.path.join(self.out_dir ,'nologo/' +  x + '.jpg')
        if (not tf.gfile.Exists(pt)) or tf.gfile.Exists(opt):
            continue

        images.append(pt)
        opaths.append(opt)
    print(len(opaths))

    dataset = getDataSet(images,opaths)

    iterator = dataset.make_one_shot_iterator()

    with tf.Session() as sess:
        for i in range(1, 18):
            print(i)
            next_element = iterator.get_next()
            res2 = sess.run(next_element)