batch tiff to jpeg conversion script

[rtilley at vt.edu]

Hope it's not inappropriate to post this here.

Could someone critique my code? I have no Python programmers in my
office to show this to. The script works OK, but should I do it
differently? I especially don't like how I check to see if jpegs exist.

The style may not be acceptable to some, but I'm concerned with
substance, not style. Is there a 'more appropriate' way to do this?

Thanks to all who take the time to give advice!

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import os
import os.path
#From PIL
import Image

def tiff_to_jpeg(path):

    for root, dirs, files in os.walk(path):
        for f in files:
            if os.path.splitext(os.path.join(root,f))[1].lower() ==
".tif":

                # If a jpeg is already present. Don't do anything.
                if
os.path.isfile(os.path.splitext(os.path.join(root,f))[0] + ".jpg"):
                    print "A jpeg file already exists for %s" %f

                # If a jpeg is *NOT* present, create one from the tiff.
                else:
                    outfile = os.path.splitext(os.path.join(root,f))[0]
+ ".jpg"
                    try:
                        im = Image.open(os.path.join(root,f))
                        print "Generating jpeg for %s" %f
                        im.thumbnail(im.size)
                        im.save(outfile, "JPEG", quality=100)
                    except Exception, e:
                        print e

# Run Program
path = '.'
tiff_to_jpeg(path)