# What's wrong with this code "Student Becomes the Teacher

#1

Error I get is:
Traceback (most recent call last):
File “python”, line 39, in
File “python”, line 35, in get_class_average
File “python”, line 27, in get_average
TypeError: string indices must be integers, not str

#----- Code-----

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 = sum(numbers)
total = float(total)

def get_average(student):
homework = average(student[“homework”])
quizzes = average(student[“quizzes”])
tests = average(student[“tests”])
return 0.1 * homework + 0.3 * quizzes + 0.6 * tests

def get_class_average(class_list):
results = []
for student in class_list:
a = get_average(student)
results.append(a)
class_average = get_average(results)
return class_average

class_list = [“lloyd”, “alice”, “tyler”]
print get_class_average(class_list)

#2

Hi @nsense432,

Within the `get_class_average` function, are you calling the correct function here? …

``````    class_average = get_average(results)
``````

Why do you include quotes here? …

``````class_list = [“lloyd”, “alice”, “tyler”]
``````

#3

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