I have an array. I want to create a new array which is the average over every third element. So the new array will be a third of the size as the original.
As an example:
what is the problem?
a = [1,2,3,4,5,6,7,8,9] def reduce_list(any_list, number_of_values_to_combine): ret_list =  for i in range(len(any_list)//number_of_values_to_combine): new_value = 0 for j in range(number_of_values_to_combine): new_value += any_list[i*number_of_values_to_combine + j] ret_list.append(new_value/number_of_values_to_combine) return ret_list print reduce_list(a,3)
rest will be ignored, if there are f.e. 7 elements combined to 3 there will be 2 elements in the result