# Why doesn't this work?

#1

Oops, try again. get_average(alice) raised the following error: sum expected at most 2 arguments, got 3

``````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 get_average(n):
total=sum(n)
total=float(total)
total=total/float(len(n))
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 sum(homework,quizzes,tests)``````

#2

#3

I tried fixing it with
sum(sum(a,b),c), still doesn't work.
Floats cannot be iterated?

#4

No they can't. Floats are just a single value, there is nothing to iterate through.

Consider what input `sum` takes, look up the documentation for it by googling "python built-in functions"

Or call help with sum as the argument

Or consider what it is you're trying to make happen on that line and see if you don't know a simpler way of doing it. You should figure out what's wrong about it though.