How everybody is doing that Error


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

Add your function below!

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"
def get_class_average(students):
results=[]
for student in students:
results.append(get_average(student))
return average(results)
print get_class_average (lloyd)
print get_class_average(alice)
print get_class_average(tyler)
print get_letter_grade(average)

ERROR IS
Traceback (most recent call last):
File "python", line 46, in
File "python", line 44, in get_class_average
File "python", line 25, in get_average
TypeError: string indices must be integers, not str


#2

Hey. I have played with your code in my head for a while.
I may probably need to paste it somewhere and run it to test my idea:

A)have you tried converting the str to integers first? i.e homework = 0.1 * average(int(student['homework']))

also, unless this is the default of the board here:

B)you may need to indent the commands under your functions properly

Let me know if you have done/tried all these :slight_smile:


#3

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