text: # -*- coding: utf-8 -*-
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  # 
  #   http://www.apache.org/licenses/LICENSE-2.0
  # 
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  
  from airflow.exceptions import AirflowException
  from airflow.contrib.hooks.aws_hook import AwsHook
  
  
  class AwsDynamoDBHook(AwsHook):
      """
      Interact with AWS DynamoDB.
  
      :param table_keys: partition key and sort key
      :type table_keys: list
      :param table_name: target DynamoDB table
      :type table_name: str
      :param region_name: aws region name (example: us-east-1)
      :type region_name: str
      """
  
      def __init__(self, table_keys=None, table_name=None, region_name=None, *args, **kwargs):
          self.table_keys = table_keys
          self.table_name = table_name
          self.region_name = region_name
          super(AwsDynamoDBHook, self).__init__(*args, **kwargs)
  
      def get_conn(self):
          self.conn = self.get_resource_type('dynamodb', self.region_name)
          return self.conn
  
      def write_batch_data(self, items):
          """
          Write batch items to dynamodb table with provisioned throughout capacity.
          """
  
          dynamodb_conn = self.get_conn()
  
          try:
              table = dynamodb_conn.Table(self.table_name)
  
              with table.batch_writer(overwrite_by_pkeys=self.table_keys) as batch:
                  for item in items:
                      batch.put_item(Item=item)
              return True
          except Exception as general_error:
              raise AirflowException(
                  'Failed to insert items in dynamodb, error: {error}'.format(
                      error=str(general_error)
                  )
              )
  