code: def save_attributes(self, request_envelope, attributes):
          # type: (RequestEnvelope, Dict[str, object]) -> None
          
          try:
              table = self.dynamodb.Table(self.table_name)
              partition_key_val = self.partition_keygen(request_envelope)
              table.put_item(
                  Item={self.partition_key_name: partition_key_val,
                        self.attribute_name: attributes})
          except ResourceNotExistsError:
              raise PersistenceException(
                  "DynamoDb table {} doesn't exist. Failed to save attributes "
                  "to DynamoDb table.".format(
                      self.table_name))
          except Exception as e:
              raise PersistenceException(
                  "Failed to save attributes to DynamoDb table. Exception of "
                  "type {} occurred: {}".format(
                      type(e).__name__, str(e)))
docs: Saves attributes to table in Dynamodb resource.
  
          Saves the attributes into Dynamodb table. Raises
          PersistenceException if table doesn't exist or ``put_item`` fails
          on the table.
  
          :param request_envelope: Request Envelope passed during skill
              invocation
          :type request_envelope: ask_sdk_model.RequestEnvelope
          :param attributes: Attributes stored under the partition keygen
              mapping in the table
          :type attributes: Dict[str, object]
          :rtype: None
          :raises: :py:class:`ask_sdk_core.exceptions.PersistenceException`