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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 _execute(self, action, parameters, attempt, measurements):
 """Invoke a DynamoDB action :param str action: DynamoDB action to invoke :param dict parameters: parameters to send into the action :param int attempt: Which attempt number this is :param list measurements: A list for accumulating request measurements :rtype: tornado.concurrent.Future """

        future = concurrent.Future()
        start = time.time()

        def handle_response(request):
            """Invoked by the IOLoop when fetch has a response to process.

            :param tornado.concurrent.Future request: The request future

            """
            self._on_response(
                action, parameters.get('TableName', 'Unknown'), attempt,
                start, request, future, measurements)

        ioloop.IOLoop.current().add_future(self._client.fetch(
            'POST', '/',
            body=json.dumps(parameters).encode('utf-8'),
            headers={
                'x-amz-target': 'DynamoDB_20120810.{}'.format(action),
                'Content-Type': 'application/x-amz-json-1.0',
            }), handle_response)
        return future