Feature Interaction Product

Problem

Build an interaction feature by multiplying two feature lists element-wise: a_i * b_i.

Return the product list; empty input returns [].

Hint

Multiply the values pairwise.

case 1

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

expected: [4,10,18]

case 2

in: [[-1,0,2],[3,-2,4]]

expected: [-3,0,8]

case 3

in: [[1.5,2.5],[2,4]]

expected: [3,10]

case 4

in: [[],[]]

expected: []

Starter codePython

def interaction_feature(a, b):
    # Your code here
    pass

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