The memory of the TensorFlow node object could not be reclaimed

[joylibo]

When I try to ran the code Chapter 5 - 05 CNN Implementation.ipynb. I noticed that the memory of the TensorFlow node object could not be reclaimed(For example _image_file = tf.read_file(imagefilename)), and as the for loop in the write_records_file method deepened, the python program took more and more memory, causing me to fail to write all the converted Picture file. What is your solution to this problem?

[joylibo]

I have solved this problem by

for breed, image_filenames in dataset.items():
        g = tf.Graph()
        with g.as_default():
        ...