Here is my piece of 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]
}
def average(numbers):
total = sum(numbers)
total = float(total)
total /= len(numbers)
return total
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
return sum
def get_letter_grade(score):
if score >= 90 and score <= 100:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
print get_average(alice)
#result = []
def get_class_average(students):
result = []
for student in students:
result.append(get_average(student))
return average(result)
#return result.average()
```

if i run the 'result = []' that is above the def get_class_average(students):

then the result is equal to write it in that function.but it exactly showed the

"get_class_average([lloyd]) returned 85.85 instead of 80.55 as expected"

I don't it what the difference it is?