def __contains__(self, key):
        return self._client.exists(key)
This task's dependencies:
dataset/ETHPy150Open lethain/Redis-Python-Datastructures/redis_ds/redis_dict.py/RedisDict.__contains__--crossover with--dataset/ETHPy150Open spotify/luigi/examples/top_artists.py/AggregateArtistsHadoop.requires