List is not working, 1 by 1 is. why?


#1




Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade

for one it is OK but for a list it has an err. do not understand why?

Replace this line with your code. 
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 = 0.0
    total = sum(numbers)
    return float(total)/len(numbers)
    
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    sum = 0.1 * homework + 0.3 * quizzes + 0.6 * tests
    result_class.append(sum)
    return sum
    
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(student):
    return results.append(get_letter_grade(get_average(student)))
    
students = [lloyd, alice, tyler]                                 
results = []
result_class = []

for item in students:
    print get_class_average(item)
print results
print result_class


#2

your get class average function which you build in this exercise looks a bit off. you should loop over the students and the append the average for each student to the list, and then return the average of the list.

I recommend you to revisit the exercise to fix your get_class_average function


#3

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