Part of the whole


#1



https://www.codecademy.com/en/courses/python-beginner-en-qzsCL/1/4?curriculum_id=4f89dab3d788890003000096


gives me this error message

Traceback (most recent call last):
File "python", line 54, in
File "python", line 52, in get_class_average
File "python", line 29, in get_average
TypeError: list indices must be integers, not str


I'm totally lost to what I'm doing wrong, checked multiple other codes in the q and a and they all look very similar to mine, any help would be much appreciated :slight_smile:.


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"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    return (homework * 0.10) + (quizzes * 0.30) + (tests * 0.60)
    

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

students = [alice, lloyd, tyler]

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


#2

here:

results.append(get_average(students))

you call get_average with argument students, however, get_average is designed to calculate the average grade of a single student, not multiply students


#3

ah thanks :slight_smile:


#4

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