grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5] def grades_sum(grades): sum = 0 for i in grades: sum += i return def grades_average(grades): s = grades_sum(grades) a = s/float(len(grades)) return a print grades_average(grades) Replace this line with your code.
By the way, below is the message in the console window:
Traceback (most recent call last):
File "python", line 14, in
File "python", line 11, in grades_average
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'
your first function should return sum, but call it total or result, since sum is built in function
See you again
That's right, I got it right. Thanks very much.