8. Part of the Whole - Alice Average Problem


#1


Hi there

Like many people for this exercise, my code is returning the following error:

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

My code is as follows:

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

get_letter_grade(get_average(lloyd))
print get_letter_grade(get_average(lloyd))

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

Cannot see where this problem is coming from, and I'm not sure if its a glitch or some very minor thing i'm missing out on here.

Cheers in advance


#2

your function should work for a class of any size (1, 2 or 3 students) supplied as argument on function call

why give your function a parameter if you are not going to use it? The exercise says you need a parameter, think why this is relevant and what value of parameter might be, the error message is a pretty big hint


#3

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