import md5
expected = "c16998f5350a2e1a55e68e6a31d6a877"
fname = r"stackless-2.6.4-macosx2009-11-04.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")