def deserialize()

in src/dynamodb_encryption_sdk/internal/formatting/material_description.py [0:0]

• 23 lines of code
• 4 McCabe index (conditional complexity)

def deserialize(serialized_material_description):
    # type: (dynamodb_types.BINARY_ATTRIBUTE) -> Dict[Text, Text]
    """Deserialize a serialized material description attribute into a material description dictionary.

    :param dict serialized_material_description: DynamoDB attribute value containing serialized material description.
    :returns: Material description dictionary
    :rtype: dict
    :raises InvalidMaterialDescriptionError: if malformed version
    :raises InvalidMaterialDescriptionVersionError: if unknown version is found
    """
    try:
        # for some reason pylint can't follow the Enum member attributes
        _raw_material_description = serialized_material_description[
            Tag.BINARY.dynamodb_tag  # pylint: disable=no-member
        ]

        material_description_bytes = io.BytesIO(_raw_material_description)
        total_bytes = len(_raw_material_description)
    except (TypeError, KeyError):
        message = "Invalid material description"
        _LOGGER.exception(message)
        raise InvalidMaterialDescriptionError(message)
    # We don't currently do anything with the version, but do check to make sure it is the one we know about.
    _read_version(material_description_bytes)

    material_description = {}
    try:
        while material_description_bytes.tell() < total_bytes:
            name = to_str(decode_value(material_description_bytes))
            value = to_str(decode_value(material_description_bytes))
            material_description[name] = value
    except struct.error:
        message = "Invalid material description"
        _LOGGER.exception(message)
        raise InvalidMaterialDescriptionError(message)
    return material_description