A weekly bug-spotting puzzle for developers.

# Build the leaderboard: each team's average score, in whole points.

scores = {"red": [2, 3], "blue": [3, 4], "green": [4, 5]}

board = {}

for team, pts in scores.items():

    avg = sum(pts) / len(pts)

    board[team] = round(avg)

ranked = dict(sorted(board.items(), key=lambda kv: -kv[1]))

print(ranked)

# expected: {'green': 5, 'blue': 4, 'red': 3}

# actual:   {'blue': 4, 'green': 4, 'red': 2}  (!)