# 8. part of whole

#1

I am getting this error message : Oops, try again. get_class_average([alice]) resulted in an error: 'str' object is not callable. But i believe my code is correct.

my complete 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]
}
students = [lloyd,alice,tyler]
def average(numbers):

total = sum(numbers)
total = float(total)
average = total/len(numbers)
return average

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
get_average = 0.1 * homework + 0.3 * quizzes + 0.6 *tests
return get_average

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_average

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

8. part of a whole
#2

the problem is actually here:

``````get_average = get_letter_grade(lloyd)
print get_average``````

by storing the result of calling get_letter_grade into get_average, you overwrote your get_average function, which means now get_average contains a string, so when you try to call get_average here:

``results.append(get_average(student))``

you get an error saying a string is not callable. Which is true.