8. Part of a Whole


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/4?curriculum_id=4f89dab3d788890003000096


I always get the error code *get_class_average([alice]) resulted in an error: 'tuple' object has no attribute 'append'


I expected the code to run properly and give me the average of all three students' results.


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 = [alice, lloyd, tyler]

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

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


#2

Remove the comma on this line,


#3

Thank you. I can't believe that my code didn't work because of just one comma.


#4

i got error "get_class_average([alice])resulted in an error:float division by zero" please tell me how can i solve this ?


#5

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