from PIL import Image
from settings import MEDIA_ROOT
import os
from os.path import join
size = (128, 128)
for image in os.listdir(join(MEDIA_ROOT, 'images/2013/02')):
    image_path = join(MEDIA_ROOT, 'images/2013/02', image)
    image_name = os.path.splitext(image)[0] + '.thumbnail'
    image_ins = Image.open(image_path)
    image_ins.thumbnail(size, Image.ANTIALIAS)
    image_ins.save(image_name, 'JPEG')

import Image
x = Image.open(r"c:\temp\1.jpg")
x.thumbnail((100, 100))
x.save(r"c:\temp\1.jpg")

 image_ins.save(image_name, 'JPEG')