and

No error, wondering why. I’ve been messing around with the code since I got confused by step 3 in the first link:

"For each student item in the class list, calculate get_average(student) and then call results.append() with that result."

I still have no idea what "class" "list" that is refering to (finished the chapter, incidentally). I’m assuming in this case it means the concept, rather than Python class? As in, the "students" list of dictionaries I made earlier, containing the three in the example (lloyd, alice, tyler).

Anyway, the problem is, I deleted that list while trying to figure out the class thing yet the code still works and lets me pass. "get_class_average" takes it as an argument, both print(type(students)) and print(students) at the end return the respective values of the locally non-existent list (copy-pasted it into PyCharm, students is an unresolved reference there). Is it because the list is globally available from somewhere? My thanks to anybody patient enough to clear up where I’ve gone wrong here.

```
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 = float(sum(numbers))
result = total / len(numbers)
return result
def get_average(student):
homework_average = average(student["homework"])
quizzes_average = average(student["quizzes"])
tests_average = average(student["tests"])
overall_average = homework_average*0.1 + quizzes_average*0.3 + tests_average*0.6
return overall_average
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):
results = []
for student in students:
results.append(get_average(student))
return average(results)
print(get_class_average(students))
print(get_letter_grade(get_class_average(students)))
print(type(students))
print(students)
```