Could anyone explain what's wrong?

#1

I am trying to do the last exercise where I am being asked to print out the result of "get_class_average" and "get_letter_grade". When I run the code, I get this error:
Traceback (most recent call last):
File "python", line 55, in
NameError: name 'students' is not defined

Here is 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]
}

def average(numbers):
total = sum(numbers)
total = float(total)
length = len(numbers)
new = total / length
return new

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

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:
get_average(student)
results.append(get_average(student))
return average(results)

print get_class_average(students)

#2

The students list isn't in your code anymore. You can put it back in your code or call get_class_average on the literal list.

``````students = [lloyd, alice, tyler] # this got deleted after one of the lessons
print get_class_average(students)``````

or

``print get_class average([lloyd, alice, tyler])``

#3

Thanks for you help.