I get the same error message nearly every time I make a mistake, and I simply don't understand what it is referring to. What are the indices? Why do they have to be integers? How do I go about problem solving this when I run into this error? My code is below. It is mostly from "Just Weight and See", but I added the section at the end for practice and ran into my now most hated and completely unhelpful error message:

Traceback (most recent call last):

File "python", line 37, in

File "python", line 28, in get_average

TypeError: list indices must be integers, not str

Can anybody help break this down? Thanks!

# code starts here

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 = float(sum(numbers))/len(numbers)

return total

def get_average(student):

homework = average(student["homework"])

quizzes = average(student["quizzes"])

tests = average(student["tests"])

homework = homework * .1

quizzes = quizzes * .3

tests = tests * .6

return homework + quizzes + tests

# error somewhere below

person = ["lloyd", "alice", "tyler"]

grade = get_average(person)

print grade