A problem in Part of the Whole


#1



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


I don't really understand that in the last three lines what is wrong!! and this is the error I get:
'Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected'
Could anyone help me? Here's my 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]
}
students = [lloyd, alice, tyler]

# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    avr = total/len(numbers)
    return avr
def get_average(student):
    homework = average(student['homework'])
    quizzes = average(student['quizzes'])
    tests = average(student['tests'])
    return 0.1 * homework + 0.3 * quizzes + 0.6 * 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"
std1 = get_letter_grade(get_average(lloyd))  
print std1
def get_class_average(student):
  results=[]
  for item in students:
    results.append(get_average(item))
  return average(results)


#2

On the third last line change:
for item in students
to
for item in student


#3

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