Expert Advice Weighted Average

Problem

Combine expert predictions with a weighted average.

Return sum(w_i * p_i) / sum(w_i), or 0.0 when the weights sum to zero.

Hint

This is the exponentially weighted forecaster's prediction.

case 1

in: [[1,3],[1,1]]

expected: 2

case 2

in: [[2,4,6],[0.5,0.25,0.25]]

expected: 3.5

case 3

in: [[5,1],[3,1]]

expected: 4

case 4

in: [[1,2],[0,0]]

expected: 0

Starter codePython

def expert_weighted_average(predictions, weights):
    # Your code here
    pass

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