i am trying to write a simple python script to verify my measurements list with PCR10 but it doesn't match.  Anybody see the mistake?
thank you - adrian

previousPCRValue = "0000000000000000000000000000000000000000"

for line in obtainedFile.readlines():

    lineArray = str.split(line)
    # using ascii measurements file, lineArray[1] is the hash value
    # concatenation
    combineHex    = previousPCRValue + lineArray[1]
    # change to binary
    combineBinary     = binascii.unhexlify(combineHex)
    # hash it
    computedHash = hashlib.sha1(combineBinary)
    # change it to hex
    previousPCRValue = computedHash.hexdigest()