https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096

Traceback (most recent call last):

File "python", line 52, in

File "python", line 50, in get_class_average

File "python", line 27, in get_average

TypeError: list indices must be integers, not str

One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade

```
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(sum(numbers)) / float(len(numbers))
return total
def get_average(students):
homework = average(students[ "homework"])* 0.1
quizzes = average(students["quizzes"])* 0.3
tests = average(students["tests"])* 0.6
avrg = homework + quizzes + tests
return avrg
def get_letter_grade(score):
if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
def get_class_average(students):
results = []
students = [ "lloyd", "alice", "tyler"]
for student in students:
results.append(get_average(students))
return average(results)
print get_class_average([students])
```