# Why won't this work?

#1

Oops, try again. get_letter_grade(100) resulted in an error: 'int' object has no attribute 'getitem'

Expected it to return the letter grade.
Does my 'score' variable return an integer? (from the function: get_average(student))

``````Replace this line with your 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)
result = total/len(numbers)
return result

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

score = get_average(student)
if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"

#2

The SCT (lesson checker) is expecting this function to take a number, not a dictionary.

The thing to do would be take a measure of the student, and pass the weighted average to this function. Of course remove this line:

Also, replace `student` with `score` as the parameter.

#3

Sorry I"m still a bit confused.

#4

Oh I think I know what you mean by the lesson check expects it to take a number.

But it's possible to take a dictionary right?

#5

No. It expects a value between 0 and 100.

#6

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