8. Part of the Whole


#1

Still consider myself a novice. I'm not sure what I'm doing wrong, but I keep getting the error message "Oops, try again. get_class_average([alice]) should return a number." I've perused the Q&A for a while to find an answer to no avail. Any help would be great!

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!
students = [lloyd, alice, tyler]

def average(numbers):
    total = float(sum(numbers))
    result = total / len(numbers)
    return result
    
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    avg = homework * 0.1 + quizzes * 0.3 + tests * 0.6
    return avg
    
print get_average(lloyd)

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"

print get_letter_grade(get_average(lloyd))

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

#2

Hi you don't need to return this line return results.append(get_average(student)) remove return and it will works.


#3

Thank you! For some reason, I was thinking a for loop worked like a function.


#4

had a problem too, thanks for the answer