Sample python code to resize image
Here is the code,
#!/usr/bin/python
import Image
import cStringIO
data=open("test.png","rb").read()
# in real application, I handle the data in memory
img=Image.open(cStringIO.StringIO(data))
img.thumbnail((800,480),Image.ANTIALIAS)
img.save("test-p.jpg","JPEG")
img.thumbnail((128,128),Image.ANTIALIAS)
img.save("test-t.jpg","JPEG")
print "DONE"