# Part of the Whole - Tuple Error?

#1

Hi all,

When I run this code, I'm getting the error message:

"Oops, try again. get_class_average([alice]) resulted in an error: 'tuple' object has no attribute 'append'"

Not sure why, since all the exercises before ran perfectly and I only added the bottom parts...I'm confused about what under Alice would make it a tuple rather than a list in the first place. Any advice?

``````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)

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return 0.1 * homework + 0.3 * quizzes \
+ 0.6 * tests

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

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

#2

The problem may lie with the comma after the `results` declaration.

#3

that's it!! Thank you

#4

You're welcome. Happy coding!

#5

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