# 8. Part of the Whole

#1

It says this: Oops, try again.
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]
}

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

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

#2

Think this through for a minute. What is the purpose of iterating the object, `students`? To examine one student at a time.

Do we wish to append the student dictionary? No. We need to append the average for each student.

#3

Wait, so, just change the student in results.append to average?

#4

Oh wait now I see what you mean. Thanks!