Returns the target output for this task.
        In this case, a successful execution of this task will create a file in HDFS.

        :return: the target output for this task.
        :rtype: object (:py:class:`~luigi.target.Target`)

def output(self):
        """
        Returns the target output for this task.
        In this case, a successful execution of this task will create a file in HDFS.

        :return: the target output for this task.
        :rtype: object (:py:class:`~luigi.target.Target`)
        """
        return luigi.contrib.hdfs.HdfsTarget('data-matrix', format=luigi.format.Gzip)