get a pyramid of an image and show multiple images in one notebook cell.

pyramid.py

# modified from http://scikit-image.org/docs/stable/auto_examples/transform/plot_pyramid.html#sphx-glr-auto-examples-transform-plot-pyramid-py
import numpy as np
import matplotlib.pyplot as plt

from skimage import data
from skimage.transform import pyramid_gaussian


image = data.astronaut()

pyramid = tuple(pyramid_gaussian(image, max_layer=3, downscale=2)) #three images with size of orignial, image/2, image/4
for (i, p) in enumerate(pyramid):
    plt.imshow(p)
    plt.figure(i + 1)