Kembalikan persatuan RDD ini dan satu lagi
# union(other)
rdd = sc.parallelize([1, 1, 2, 3])
rdd.union(rdd).collect()
# [1, 1, 2, 3, 1, 1, 2, 3]
Ethercourt.ml
# union(other)
rdd = sc.parallelize([1, 1, 2, 3])
rdd.union(rdd).collect()
# [1, 1, 2, 3, 1, 1, 2, 3]