def output(self):
        return luigi.contrib.hdfs.HdfsTarget(self.date.strftime('/tmp/text/%Y-%m-%d.txt'))
A follow should require a user_id.
dataset/ETHPy150Open spotify/luigi/examples/wordcount_hadoop.py/InputText.output--crossover with--dataset/ETHPy150Open heiskr/sagefy/server/test/test_models_follow.py/test_user_id