Student Becomes Teacher, 8. Part of a Whole


#1

Hello, I have having some trouble with: Student Becomes Teacher, 8. Part of a Whole.

I have included my code and the related error message below it. Perhaps there's something wrong with my Return statement. Please help diagnose. Thanks very much.


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 .1 * homework +\
.3 * quizzes +\
.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"

print get_letter_grade(get_average(lloyd))

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

ERROR:
Oops, try again. get_class_average([alice]) resulted in an error: 'list' object has no attribute 'average'


#2

step 4 of the instructions:

Finally, return the result of calling average() with results

you are calling average method on result with argument score.

also, a function ends the moment a return keyword is reached, this currently happens in the first iteration of the loop.


#3

You must have to take average of results list also and then return the final average
like...
def get_class_average(students):
results =[]
for student in students:
avg = get_average(student)
results.append(avg)
avg = sum(results)/len(results)
return avg


#5

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