Apparently my code is failing in the **average** function, but I can't figure out why

lloyd = {

"name": "Lloyd",

"homework": [90.0, 97.0, 75.0, 92.0],

"quizzes": [88.0, 40.0, 94.0],

"tests": [75.0, 90.0]

}

alice = {

"name": "Alice",

"homework": [100.0, 92.0, 98.0, 100.0],

"quizzes": [82.0, 83.0, 91.0],

"tests": [89.0, 97.0]

}

tyler = {

"name": "Tyler",

"homework": [0.0, 87.0, 75.0, 22.0],

"quizzes": [0.0, 75.0, 78.0],

"tests": [100.0, 100.0]

}

def average(numbers):

total = float(sum(numbers))

return total / len(numbers)

def get_average(student):

homework = average(student["homework"])

quizzes = average(student["quizzes"])

tests = average(["tests"])

return 0.1 * homework + 0.3 * quizzes + 0.6 * tests