# Student becomes the teacher: Part of the Whole - Error get_class_average([alice]) should return a number

#1

Error: get_class_average([alice]) should return a number

I've seen a lot of posts with similar errors but still haven't been able to understand what's wrong, I think I'm overlooking something.
Any help would be greatly appreciated, this has taken up my whole morning lol
thanks!!

``````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) / len(numbers)

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

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 = []
for student in students:
results.append(get_average(student))
return results``````

#2

I might be wrong, but the way I understand it your get_class_average function returns a list containing the different grades of all students. The way I interpret the instructions, you want to take these grades, average them and then return a single averaged number.

#3

@captainwater is correct, Your `results` variable is just a list and to find the average ,you need to use `average()` function on `results` list while you return it.

#4

Thanks so much that fixed it!

#5

Thank you don't know how I overlooked that!

#6

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