The following script will resize the image to half of its width and half of its height:
examples/python/resize_image.py
from PIL import Image
in_file = 'images/code-maven-workshops-1600x900.png' # 1600, 900
out_file = 'new.png'
img = Image.open(in_file)
size = (img.size[0]/2, img.size[1]/2)
img.thumbnail(size)
img.save(out_file)
