In my machine learning with python textbook, there is this section of code:
from keras.datasets import mnist
(train_images, train_labels), (test_images, test_labels) = mnist.load_data()
I understand that the goal of this was to import the mnist training images, labels, and test images and labels but what is being done in the second line? Are those arrays and if they are what would they look like / what type of data holding mechanism is it? How would we know to what set mnist.load_data() is being assigned to?