def purity(listy):
    pure_listy = []
    for key in listy:
        if key % 2 == 0:
            pure_listy.append(key)
        else:
            print key
    print pure_listy
    return pure_listy


purity([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19])
"""
output prints:
1
3
5
7
9
11
13
15
17
19
[2,4,6,8,10,12,14,16,18]
which is exactly what i want but the exercise is telling me
"Your code threw a "'builtin_function_or_method' object has no attribute '__getitem__'" error.
"""