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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 get_assets_by_parent_genus_type(self, asset_genus_type=None):
 """Gets an ``AssetList`` corresponding to the given asset genus ``Type`` and include any additional assets with genus types derived from the specified ``Type``. In plenary mode, the returned list contains all known assets or an error results. Otherwise, the returned list may contain only those assets that are accessible through this session. arg: asset_genus_type (osid.type.Type):
 an asset genus type return: (osid.repository.AssetList) - the returned ``Asset list`` raise: NullArgument - ``asset_genus_type`` is ``null`` raise: OperationFailed - unable to complete request raise: PermissionDenied - authorization failure *compliance: mandatory -- This method must be implemented.* """

        return AssetList(self._provider_session.get_assets_by_parent_genus_type(asset_genus_type),
                         self._config_map)