# Part of the Whole

#1

My code does NOT work if I type "for i in students:". It works if I type "for student in students:". Why is that?

The error message I am getting is: "Oops, try again. get_class_average([alice]) resulted in an error: global name 'student' is not defined"

I expect it to work with this too - "for i in students:"

``````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"])
result = 0.1 * homework + 0.3 * quizzes + 0.6 * tests
return result

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 i in students:
results.append(get_average(student))
return average(results)``````

#2

``````for student in students:
results.append(get_average(student))``````

This works because each item in the `students` list is transferred to `student` which is then used to `get_average(student)`

``````for i in students:
results.append(get_average(student))``````

However, this doesn't work because now each in the `students` list is transferred to `i` and `i` is never used. You still have `results.append(get_average(student))` but student is never defined in the function.
If you were to change it to this:

``````for i in students:
results.append(get_average(i))``````

This will work as intended.