I eventually went with: #!/usr/bin/env python from PIL import Image import glob, os, re
size = 128, 128 def thumbnailer(dir, filenameRx): for picture in [ p for p in os.listdir(dir) if os.path.isfile(os.path.join( dir,p)) and filenameRx.match(p) if 'thumbnail' not in p]: file, ext = os.path.splitext(picture) im = Image.open (picture) im.thumbnail(size, Image.ANTIALIAS) im.save(file + ".thumbnail" + ext) jpg = re.compile(".*\.(jpg|jpeg)", re.IGNORECASE) thumbnailer(".", jpg) Thanks for the help! -- http://mail.python.org/mailman/listinfo/python-list