Leakage Check

Problem

Compute the test-set leakage fraction: the share of test indices that also appear in the training indices. An empty test set returns 0.0.

Hint

Any nonzero leakage invalidates held-out evaluation claims.

case 1

in: [[1,2,3],[4,5,6]]

expected: 0

case 2

in: [[1,2,3,4],[3,4,5,6]]

expected: 0.5

case 3

in: [[],[]]

expected: 0

Starter codePython

def dataset_leakage_fraction(train_indices, test_indices):
    # Your code here
    pass

3 test cases · run your code against them in the editor