11.8


#1

I'm getting the following error:

Traceback (most recent call last):
File "python", line 55, in
File "python", line 50, in get_class_average
File "python", line 28, in get_average
TypeError: string indices must be integers, not str

Below is my code. Can anyone tell me what the issue is. I have no idea!!!

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)
float_total = float(total)
total = float_total / len(numbers)
return total

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

def get_letter_grade(score):
if score >= 90:
return "A"
elif score < 90 and score >= 80:
return "B"
elif score < 80 and score >= 70:
return "C"
elif score < 70 and 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_letter_grade(get_average(lloyd))
print get_class_average(results)


#2

That error message is pretty clear, read it! (indices is plural of index)

You might add print statements in that location to get more information.