Part of the Whole


#1



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

Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected

I don't understand how to get the correct number.


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)
    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 (0.1 * average(student["homework"]) + \
    0.3 * average(student["quizzes"]) + \
    0.6 * average(student["tests"]) )
    
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'

def get_class_average(students):
    students = [lloyd, alice, tyler]
    results = []
    for student in students:
        get_average(student)
        results.append(get_average(student))
    return average(results)

Any helpful explanation will be appreciated.


#2

Hi @leopard1996,

I can spot the error, which is here:

you shouldn't place this list within your function, but rather outside of the function.

Unfortunately, I don't know why not either...I suspect that this causes the list to become restricted to the get_class_average function but yeah.... :stuck_out_tongue: waits for another coder to appear


#3

Just take out the following line and it will work:
students = [lloyd, alice, tyler] <--- This is not needed


#4

I have to remove this:
students = [lloyd, alice, tyler]

and this:
get_average(student) # you are call it twice. it's first time.