deos randomSplit return a copy or a reference to the original rdd? [Python]

[Pagliari, Roberto]

Suppose I have something like the code below


        for idx in xrange(0, 10):
            train_test_split = training.randomSplit(weights=[0.75, 0.25])
            train_cv = train_test_split[0]
            test_cv = train_test_split[1]
            # scale train_cv and test_cv


by scaling train_cv and test_cv, will the original data be affected?

Thanks,