# Part of the Whole

#1

i get this error
Oops, try again. get_class_average([alice, lloyd]) returned 80.55 instead of 85.85 as expected
what am i doing wrong?

``````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 = float(sum(numbers))
result = total / len(numbers)
return result

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return .10 * average(student["homework"]) + .30 * average(student["quizzes"]) + .60 * average(student["tests"])

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

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

#2

Try converting integers to floats inside get_average as well, for greater accuracy. This looks like you may be losing precision somewhere up the line from the result.

#3

i dont understand....

#4

If you are working with integer object types in `get_average(student)`, it is possible for you to lose precision there, before you get to `get_class_average(students)`

#5

so how do i fix my code?

#6

Convert any and all integers to float types in get_average or before.

#7

still lost, can you give me an example?

#8

``````def average(numbers):
total = float(sum(numbers))
result = total / len(numbers)
return float(result)``````

Something along these lines to ensure precision. That may not be your problem, but it's worth a try.

#9

nopes still not working

#10

I have the same error. I noticed that 80.55 it the average of lloyd alone.

sovled it put "results.append(get_average(student))" in the for loop.

#11

Thanks so much man!

#12

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