images_train = mnist.train.images labels_train = mnist.train.labels images_test = mnist.test.images labels_test = mnist.test.labels images_train_3d = np.reshape(images_train, [-1, 28, 28]) images_test_3d = np.reshape(images_test, [-1, 28, 28]) images_flip_train_3d = images_train_3d[:, :, ::-1] images_flip_test_3d = images_test_3d[:, :, ::-1] images_flip_train = np.reshape(images_flip_train_3d, [-1
