ValueError: not enough values to unpack (expected 2, got 1)?

Question

def cnn_data(data):
    x, y = data.shape[1:]
    return data.reshape((-1, x, y, 1))

We introduce this function used in the following code.

Answer 1

it seems like you data has 2 dimensions, so data.shape[1:] is only one integer. Hence the error message

Answer 2

In this line of code x and y are two values while data.shape is producing only one value:

x, y = data.shape[1:]