Just Weight and See


#1

I don't understand why I get the following error message:

Oops, try again. get_average(alice) raised the following error: list indices must be integers, not str

This 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]
}

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

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

Can someone help me?


#2

here:

tests = average(students["tests"])

you use students, but get_average calculates the average grade for a single student, not multiply students


#3

Thank you very much

(I am fed up of doing stupid mistakes...)


#4

then i have some bad news for you, you will keep making mistakes. (okay, i shouldn't be to pessimistic, you will make less mistakes and less stupid mistakes, and you will get better at finding mistakes and fixing them :slight_smile: )

Learn from your mistakes :slight_smile:


#5

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