waldo2.py

import os
import glob
import hashlib

a = set()

filenames = glob.glob("./waldo/*.jpg")
for filename in filenames:
    with open(filename, 'rb') as inputfile:
        data = inputfile.read()
        if '9f6e902c233020026caf0ebbb1cf0ff5' == hashlib.md5(data).hexdigest():
        	print filename