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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 hash(buf, encoding="utf-8"):
 """ Compute the fuzzy hash of a buffer :param String|Bytes buf: The data to be fuzzy hashed :return: The fuzzy hash :rtype: String :raises InternalError: If lib returns an internal error :raises TypeError: If buf is not String or Bytes """


    if isinstance(buf, six.text_type):
        buf = buf.encode(encoding)

    if not isinstance(buf, six.binary_type):
        raise TypeError(
            "Argument must be of string, unicode or bytes type not "
            "'%r'" % type(buf)
        )

    # allocate memory for result
    result = ffi.new("char[]", binding.lib.FUZZY_MAX_RESULT)
    if binding.lib.fuzzy_hash_buf(buf, len(buf), result) != 0:
        raise InternalError("Function returned an unexpected error code")

    return ffi.string(result).decode("ascii")