```
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)
total = float(total)
total = total / len(numbers)
return total
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
total = homework*0.1 + quizzes*0.3 + tests*0.6
return total
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 = [lloyd, alice, tyler]):
results=[]
for student in students:
results.append(get_average(student))
results = average(results)
return results
Oops, try again. get_class_average([alice, lloyd]) resulted in an error: 'float' object has no attribute 'append'
```

# Resulted in an error: 'float' object has no attribute 'append'

**liushu123**#1

**lassenberg**#5

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]

}

students = [lloyd, alice, tyler]

# Add your function below!

def average(numbers):

total = sum(numbers)

total = float(total) / len(numbers)

return total

def get_average(student):

homework = average(student["homework"])

homework = average(student["quizzes"])

homework = average(student["tests"])

return .1 * average(student["homework"]) + \

.3 * average(student["quizzes"]) + .6 * average(student ["tests"])

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"

`get_letter_grade(get_average(lloyd))`

def get_class_average(students):

results = []

for student in students:

results.append(get_average(students))

return average(results)

` I am getting this error`

Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str

**system**#7

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