import md5
expected = "e97f6e610c926c70bc9ff8929f9dab7b"
fname = r"stackless-3.1.1-macosx2009-10-23.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")