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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def stripascii(string):
 """Return string truncated at last byte that is 7-bit ASCII. Clean NULL separated and terminated TIFF strings. b'string\\x00string\\n' b'' """

    # TODO: pythonize this
    i = len(string)
    while i:
        i -= 1
        if 8 < byte2int(string[i]) < 127:
            break
    else:
        i = -1
    return string[:i+1]