The Console shows following error:

B

83.8666666667

Traceback (most recent call last):

File "python", line 55, in

TypeError: 'function' object has no attribute '**getitem**'

I don't understand what is wrong with this code, as the exercise is completed and , still an error exist.

What is the wrong in the code can anybody elaborate on this...

```
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!
students =[lloyd,alice,tyler]
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"])
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"
result=get_letter_grade(get_average(lloyd))
print result
def get_class_average(students):
results=[]
for stud in students:
results.append(get_average(stud))
return average(results)
print average(results)
print get_class_average(students)
print get_letter_grade(get_class_average[students])
```