the mean and std of smallNORB dataset

[HJLYU0519]

I want to realize the first normalization of smallNORB, but I could not get the value of mean and variance(std) in data/smallNORB.py
177 line: mean, variance = tf.nn.moments(image, [0, 1, 2]) I am sure both mean and variance is scalar. is there some way to get the mean and variance(std) of smallNORB dataset?

Thanks so much if you could help me!

[HJLYU0519]

if I print(mean, variance), I could just get some attributes but not the value of mean and std