#1

I am stuck at excise 9

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

MY code seems pretty right and the result from result tab seems reasonable for me.

``````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 homework * 0.1 + quizzes * 0.3 + tests * 0.6

if score >= 90:
return 'A'
elif score >= 80 and score < 90:
return 'B'
elif score >= 70 and score < 80:
return 'C'
elif score >= 60 and score < 70:
return 'D'
else:
return 'F'

def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)

print get_class_average([lloyd, alice, tyler])

#2

List students is not defined and this is probably causing the error. You have to add this line to your code:

``students = [alice, tyler, lloyd]``

This code was part of previous exercise.

#3

yeah! Problem solved, thx!

#4

Great! You're welcome.

#5

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