Hi, im gentting this message every time I press "Save & Submit Code":

Traceback (most recent call last):

File "python/cli_runner.py", line 152, in

What should I do ?

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]

}

# Add your function below!

def average(numbers):

total = sum(numbers)

total = float(total)

result = total / len(numbers)

return result

def get_average(student):

homework = average(student["homework"])

quizzes = average(student["quizzes"])

tests = average(student["tests"])

return 0.10 * average(student["homework"]) + 0.30 * average(student["quizzes"]) + 0.60 * average(student["tests"])

def get_letter_grade(score):

if score >= 90: return "A"

def get_class_average(students):

results = ()

```
if score >= 80: return "B"
elif score >= 70: return "C"
elif score >= 60: return "D"
else: return "F"
print get_letter_grade(get_average(lloyd))
```

def get_class_average(students):

results = []

for student in students：

results.append(get_average(student))

return average(results)