Win Rate from Pairwise Outcomes

Problem

Return the win rate from outcomes coded 1 for a win, 0 for a tie, and -1 for a loss, counting a tie as half a win: (wins + 0.5 * ties) / n. Return 0.0 for an empty list.

Test cases

case 1

in: [[1,1,-1,0]]

expected: 0.625

case 2

in: [[0,0,0]]

expected: 0.5

case 3

in: [[]]

expected: 0

case 4

in: [[-1,-1]]

expected: 0

case 5

in: [[1,-1]]

expected: 0.5

Starter codePython

def win_rate(outcomes):
    # Your code here
    pass

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