ValueError: high <= 0

[vyom1911]

line 123, in get_batch
idx = np.random.randint(0, self.images.shape[0] - 1, num)
File "mtrand.pyx", line 748, in numpy.random.mtrand.RandomState.randint
File "_bounded_integers.pyx", line 1247, in numpy.random._bounded_integers._rand_int64

I think it may be because of dataset issue. I have my data as jpeg files in /data/ folder and I also tried as tensorflow records. Can you add instruction to run on what should be the type of data and how can I convert it in that format