Following Instructions incorrectly?


#1



I did as the instructions ask:
1. First, make an empty list called results.
2. For each student item in the class list, calculate get_average(student) and then call results.append() with that result.
3. Finally, return the result of calling average() with results.

The error I get is that the average of all the scores is incorrect. I get 83.86, but it is saying I should get 91.15.
I have a theory of why this is, but I feel like I would have to veer off what the instructions are asking of me to complete.

I am thinking that if I combine the keys(homework, quizzes, test) of each student then do the "get_average" function of that list then i'd be getting the 91.15 its saying I should get. I don't think that's what the instructions are asking of me though.. so I want to see how i'm following the instructions wrong.


#added this question to the beginning - ignore
name = raw_input("Enter name and receive letter grade:")


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]
}

students = [lloyd,alice,tyler]

# Add your function below!
def average(numbers):
    total = sum(numbers)
    return float(total) / len(numbers)
    
def get_average(student):
    avg = 0
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    avg += homework * .10
    avg += quizzes * .30
    avg += tests * .60
    
    return avg
    
    
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"
 
#added function for question in the beginning - ignore
def letter_grade(name):
    if name == "Alice":
        return get_letter_grade(get_average(alice))
    elif name == "Lloyd":
        return get_letter_grade(get_average(lloyd))
    elif name == "Tyler":
        return get_letter_grade(get_average(tyler))
    else:
        return "Please enter one of your students: Alice, Lloyd, or Tyler"

print letter_grade(name)

results = []

def get_class_average(students):
    results.append(get_average(alice))
    results.append(get_average(lloyd))
    results.append(get_average(tyler))
    return average(results)


print "class average:"
print get_class_average(students)


#2

this code looks different from the exercise?

anyway, your get_class_average should be able to calculate the average for a single students, two students (any possible combination) and all 3 students, this is currently not possible with your code

follow the instructions from the lesson to make this possible.


#3

Derp I fixed it. I forgot a for loop in my function. Ty for help


#4