Getting Error in "Student Becomes the Teacher How is Everybody Doing? "

#1

I am getting error “One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade”

I cant understand where the error is as I am able to get the results. My code is appended below

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"])
    total = homework * 0.1 + quizzes * 0.3 + tests * 0.6
    return total


def get_letter_grade(score):
    if score >= 90:
        return "A"
    elif score >= 80 and score < 90:
        return "B"
    elif score >= 70 and score < 80:
        return "C"
    elif score >= 60 and score < 70:
        return "D"
    else:
        return "F"


print get_letter_grade(get_average(lloyd))


def get_class_average(class_list):
    results = []
    for student in class_list:
        average = get_average(student)
        results.append(average)
    average = float(sum(results))/len(class_list)
    return average

print get_class_average([lloyd,alice,tyler])
print get_letter_grade(get_class_average([lloyd,alice,tyler]))
#2

I have got the solution. I was missing the student declaration as I directly fed the list as argument. It never came to my mind that I can get that error.

My last 2 lines replaced with this code and now it works fine.

students = [lloyd, alice, tyler]
print get_class_average(students)
print get_letter_grade(get_class_average(students))