# Part of the Whole

#1

get_class_average([alice]) resulted in an error: list indices must be integers, not str

``````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)
def get_average(student):
homework = average(student["homework"])* 0.1
quizzes = average(student["quizzes"]) * 0.3
tests = average(student["tests"]) * 0.6
return homework + quizzes + 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 item in students:
get_average(students)
results.append()
results = average(results)
return results``````

#2

lets start here:

``get_average(students)``

get_average is designed to calculate the average grade for a single student, `students` is a list with multiply students

once you fixed that, you don't store this average result anywhere, so how are you going to append it to your results list?

``results.append()``

you are not appending anything?

and finally:

``results = average(results)``

why would you do this inside the loop? Inside the loop you are appending to the list, once the list has all its data, you should calculate the average

#3

so do I have to get_average on Lloyd, alice and tyler individually?

#4

no, you have a loop which loops over the list, you can use the iterator to get the average for each student in students

#5

I don't understand can you please explain it in the most simple terms.

#6

can i see an updated version of your code?

here:

``get_average(students)``

you need to change students to your for loop iterator, which contains the individual students

once you done that, you need to store this result in a variable so you can append it to your results list

#7

I am sorry I still don't understand what I need to do

#8

``````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)
def get_average(student):
homework = average(student["homework"])* 0.1
quizzes = average(student["quizzes"]) * 0.3
tests = average(student["tests"]) * 0.6
return homework + quizzes + tests
if score >=90:
return "A"
elif score >= 80:
return "B"
elif score>=70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
students = [lloyd, alice, tyler]
def get_class_average(students):
results = []
for item in students:
results = results.append(get_average(student))
return results``````

#9

#10

I have posted my code but it will not allow me to post it again.

#11

`.append()` updates the list for you. No need to store it in a variable as well.

you have want to append the get_average of student, change your loop iterator to student

you should return `average(results)`

#12

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

#13

what is so unclear about my instructions?

#14

my code is now:
def get_class_average(students):
results = []
for student in students:
result = get_class_average(student)
result.append(results)
return average(results)

#15

that is not an answer to my question? and frankly, you are just trying now. That doesn't work

#16

why doesn't it work? Please be patient with me I am new to programming.

#17

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