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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 _read_version(material_description_bytes):
 # type: (io.BytesIO) -> None """Read the version from the serialized material description and raise an error if it is unknown. :param material_description_bytes: serializezd material description :type material_description_bytes: io.BytesIO :raises InvalidMaterialDescriptionError: if malformed version :raises InvalidMaterialDescriptionVersionError: if unknown version is found """

    try:
        (version,) = unpack_value(">4s", material_description_bytes)
    except struct.error:
        message = "Malformed material description version"
        _LOGGER.exception(message)
        raise InvalidMaterialDescriptionError(message)
    if version != _MATERIAL_DESCRIPTION_VERSION:
        raise InvalidMaterialDescriptionVersionError("Invalid material description version: {}".format(repr(version)))