# 7/9 below is my code it shows "TypeError: string indices must be integers, not str"

#1
``````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)
result = total/len(numbers)
return result
def get_average(student) :
homework = average(student["homework"])
homework1= average(student["quizzes"])
homework2 = average(student["tests"])
return (0.1*homework + 0.3*homework1 + 0.6*homework2)

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

``````

#2

Hi @pypro76543,

There are a couple of problems here …

``````print get_letter_grade(get_average('llyod'))
``````

Are you passing a variable to the function? Also check the spelling.

#3

i am not able to figure it out

#4

You need to pass the `lloyd` dictionary to the `get_average` function, but you have quotes in the argument. There is also a difference in spelling.

#5

yeah, i got it . I am supposed to send a variable as argument for get_average().
thank you

#6