Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str


#1

i cant get this to work.

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 = sum(numbers)
length = len(numbers)
comp = float(total) / length
return comp

def get_average(student):
homework = average(student["homework"])
quiz = average(student["quizzes"])
test = average(student["tests"])
av = homework * .1 + quiz * .3 + test * .6
return av

def get_letter_grade(score):
sc = int(score)
if sc >= 90:
return "A"
elif sc >= 80:
return "B"
elif sc >= 70:
return"C"
elif sc >= 60:
return "D"
else:
return "F"

print get_letter_grade(get_average(lloyd))

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


#2

Change your function to this:

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


#3

worked perfectly! thanks so much!