def cogroup(self, other, numPartitions=None): """ For each key k in C{self} or C{other}, return a resulting RDD that contains a tuple with the list of values for that key in C{self} as well as C{other}. >>> x = sc.parallelize([("a", 1), ("b", 4)]) >>> y = sc.parallelize([("a", 2)]) >>> sorted(x.cogroup(y).collect()) [('a', ([1], [2])), ('b', ([4], []))] """ return python_cogroup(self, other, numPartitions)