Here is my exact 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]

}

# Add your function below!

def average(numbers):

total=float(sum(numbers))

total = total/len(numbers)

return total

def get_average (student):

homework = average(student['homework'])

quizzes =average(student['quizzes'])

tests = average(student['tests'])

sum = homework*0.1 +quizzes * 0.3 + tests * 0.6

return sum

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))

def get_class_average(students):

results=[]

for s in students:

results.append(get_average(s))

return average(results)

Student = [lloyd, alice, tyler]

print get_class_average(Student)

print get_letter_grade(get_class_average(Student))

i don't see why shouldn't it work! can any body help out?