Why won't tf.write_file write a file?

Question

My code is:

i = 0
fgsm = FastGradientMethod(wrap)
adv = fgsm.generate(x_test_tensor, **fgsm_params)

for adv_x in tf.unstack(adv):
    img = tf.cast(adv_x, dtype=tf.uint8)
    tf_image = tf.image.encode_jpeg(img)
    tf.write_file('adversarial_examples/' + str(i) + '.jpg', tf_image)
    i += 1

Where FastGradientMethod is from cleverhans. This runs without an error, but the jpg's don't exist in my folder. What's missing?

score 2 · Accepted Answer · answered Apr 17 '19 at 23:23

may the path of the destination file is not correct

import os

for adv_x in tf.unstack(adv):
    img = tf.cast(adv_x, dtype=tf.uint8)
    tf_image = tf.image.encode_jpeg(img)
    pth = os.path.join('adversarial_examples', '%s.jpg'%i)
    tf.write_file(pth, tf_image)
    i += 1

score 1 · Answer 2 · edited Mar 25 '21 at 00:27

1

you should:

op = tf.write_file(pth, tf_image)
sess.run(op)

Where sess is a tf.session.

edited Mar 25 '21 at 00:27

Robert

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answered Mar 24 '21 at 14:46

rolyan trauts

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Why won't tf.write_file write a file?

2 Answers2