code: def health_check(self):
          
          logger.debug('Health Check on S3 file for: {namespace}'.format(
              namespace=self.namespace
          ))
  
          try:
              self.client.head_object(Bucket=self.bucket_name, Key=self.data_file)
              return True
          except ClientError as e:
              logger.debug('Error encountered with S3.  Assume unhealthy')
docs: Uses head object to make sure the file exists in S3.