I am getting a "none" between my print of the grades and my print of the sum of the grades.
Your Total Grade is: 1045.5
I would expect that the none would not be there.
How do I get rid of the "none"
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5] def print_grades(grades): for grade in grades: print grade def grades_sum(grades): total = 0 for grade in grades: total += grade return total def grades_average(grades): sum_of_grades = grades_sum(grades) average = sum_of_grades / float(len(grades)) return average def grades_variance(grades): average = grades_average(grades) variance = 0 for grade in grades: variance +=(average - grade)**2/len(grades) return variance print grades_variance(grades) def grades_std_deviation(variance): return float(variance) ** 0.5 variance = grades_variance(grades) print grades_std_deviation(variance) print 'Your Grades are: \n', print_grades(grades) print 'Your Total Grade is: ', grades_sum(grades) print 'Your Average Grade is: ', grades_average(grades) print 'Your Variance from Average is: ', grades_variance(grades) print 'Your Standard Deviation is: ', grades_std_deviation(variance)