Create thumbnail images for jpegs with python

As the title says i am looking for a way convert a huge number of images into thumbn开发者_JAVA百科ails of different sizes , How do i go about doing this in python

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See: http://www.pythonware.com/products/pil/index.htm

import os, sys
import Image

size = 128, 128

for infile in sys.argv[1:]:
    outfile = os.path.splitext(infile)[0] + ".thumbnail"
    if infile != outfile:
        try:
            im = Image.open(infile)
            im.thumbnail(size)
            im.save(outfile, "JPEG")
        except IOError:
            print "cannot create thumbnail for", infile