code: def _upload_s3(self, zip_file):
          '''
          Uploads the lambda package to s3
          '''
          s3_client = self._aws_session.client('s3')
          transfer = boto3.s3.transfer.S3Transfer(s3_client)
          transfer.upload_file(zip_file, self._config.s3_bucket,
                               self._config.s3_package_name()f _upload_s3(self, zip_file):
          '''
          Uploads the lambda package to s3
          '''
          s3_client = self._aws_session.client('s3')
          transfer = boto3.s3.transfer.S3Transfer(s3_client)
          transfer.upload_file(zip_file, self._config.s3_bucket,
                               self._config.s3_package_name())
docs: Uploads the lambda package to s3