Need help


#1

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 = 0
    for i in numbers:
        total += i
    return float(total)/len(numbers)
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"
    print get_letter_grade(get_average(lloyd))
students = ["lloyd","alice","tyler"]
def get_class_average(students):
    results=()
    for x in students:
        results.append(get_average(x))
    return average(results)
    print results

it shows:-
Oops, try again. get_class_average([alice]) resulted in an error: 'tuple' object has no attribute 'append'


#2

@vineetsinghkumar
When you write:
results=()
You are creating an empty tuple, tuples can not be appended to.
What you want to do is create an empty list.