Error in lesson 8


#1

it keeps saying this
Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str
and here is my 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 = sum(numbers)
total = float(total)
total = total / len(numbers)
return total

def get_average(student):
homework = average(student["homework"])*.1
quizzes = average(student["quizzes"])*.3
tests = average(student["tests"])*.6
return homework + quizzes + tests

def get_letter_grade(score):
if score >= 90:
return "A"
elif score >= 80 and score <90:
return "B"
elif score >= 70 and score < 80:
return "C"
elif score >= 60 and score < 70:
return "D"
else:
return "F"

print get_letter_grade (lloyd)

students = [lloyd, alice, tyler]

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


#2

Firstly, please edit your code using the back quotes

#Your code right here

So that it is easier to read and even copy to the console for us to check.

Secondly, I think you there may be an error on this particular part...

print get_letter_grade (lloyd)

students = [lloyd, alice, tyler]

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

I can give you 3 hints to fix your code here:

print get_letter_grade (lloyd)

1.) MOST IMPORTANT: In the code above, what type is the parameter for that function is supposed to be? Check the previous lesson.

2.) When are you calling the get_class_average function?

3.) Why do you return the "get_average(results)" in the get_class_average function?


#4

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