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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_logs(self, log_stream_name, get_last=50):
 """Retrieve log stream from CloudWatch"""

        response = self._log_client.get_log_events(
            logGroupName='/aws/batch/job',
            logStreamName=log_stream_name,
            startFromHead=False)
        events = response['events']
        return '\n'.join(e['message'] for e in events[-get_last:])