import md5
expected = "1dd3104286bcc01cbd1ddc6ecafecaf9"
fname = r"stackless-2.5.2-macosx2008-02-27.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")