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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 retrieve_logs(self, include_lambda_messages=True, max_entries=None):
 # type: (bool, Optional[int]) -> Iterator[Dict[str, Any]] """Retrieve logs from a log group. :type include_lambda_messages: boolean :param include_lambda_messages: Include logs generated by the AWS Lambda service. If this value is False, only chalice logs will be included. :type max_entries: int :param max_entries: Maximum number of log messages to include. :rtype: iterator :return: An iterator that yields event dicts. Each event dict has these keys: * logStreamName -> (string) The name of the log stream. * timestamp -> (datetime.datetime) - The timestamp for the msg. * message -> (string) The data contained in the log event. * ingestionTime -> (datetime.datetime) Ingestion time of event. * eventId -> (string) A unique identifier for this event. * logShortId -> (string) Short identifier for logStreamName. """

        # TODO: Add support for startTime/endTime.
        shown = 0
        for event in self._client.iter_log_events(self._log_group_name,
                                                  interleaved=True):
            if not include_lambda_messages and \
                    self._is_lambda_message(event):
                continue
            # logStreamName is: '2016/07/05/[id]hash'
            # We want to extract the hash portion and
            # provide a short identifier.
            identifier = event['logStreamName']
            if ']' in identifier:
                index = identifier.find(']')
                identifier = identifier[index + 1:index + 7]
            event['logShortId'] = identifier
            yield event
            shown += 1
            if max_entries is not None and shown >= max_entries:
                return