# Part of the whole

#1

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

Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected

The average to be correct

``````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)
return float(total)/len(numbers)
# Add your function below!
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return (homework*.1 + quizzes*.3 + tests*.6)
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"
print get_letter_grade(get_average(lloyd))
print get_letter_grade(get_average(alice))
print get_letter_grade(get_average(tyler))

class_list = [lloyd, alice, tyler]
def get_class_average(students):
results = []
for student in class_list:
results.append(get_average(student))
return average(results)``````

#2

I think your error comes from this bit:

As you can see here, you have the `get_class_average` function with the parameter `students`. Within this function, you decide to iterate through the list that would be called in the function, so, you did `for student in class_list`.

However, this is a mistake because the list `class_list` hasn't been passed into the function since the function has yet to be called. Hence, to make your code work, you simply have to replace `for student in class_list` with `for student in students`, which is the parameter you are defining the function with before you pass anything else into it.

Hope this helps