8/9 get_class_average([alice]) resulted in an error: global name 'results' is not defined


#1

Hey Everybody, I'm currently stuck on 8/9 and can't seem to figure out why I keep getting this error message:
"get_class_average([alice]) resulted in an error: global name 'results' is not defined"

Here is my code:

def get_class_average(student):
results()
for student in students:
    get_average(student)
    results.append()
    return average(results)

Can anybody explain to me what i'm doing wrong?

Cheers!


#2

Here's my code

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/=len(numbers)
return 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

Define function called get_average with one argument called student

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

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"

print get_letter_grade(get_average(lloyd))

def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)


#3

I'm sure you've figured it out by now, but you appear to be using the wrong parentheses for results. For lists you need to use square brackets. [ ]


#4

should be:

results.append(get_average(student))

In your example results is an empty list, which you have not added anything to, therefore 'results' is not defined.