import md5
expected = "6aeefc3744e19c1e5d157a2d9d36c552"
fname = r"stackless-2.5.1-macosx2007-06-20.dmg"
print "expected digest", expected
received = md5.md5(file(fname, "rb").read()).hexdigest()
print ("matched", "NOT MATCHED!!") [received != expected]
raw_input("press enter to continue")