def selection_sort(my_list):
  for i in range(len(my_list)-1):
    min_index = i
    for j in range (i, len(my_list) ):
       if my_list[j] < my_list[min_index]:
          min_index = j

    my_list[i], my_list[min_index] = my_list[min_index], my_list[i]

my_list = [1,8,5,12,3,43,7,9,6]
selection_sort(my_list)
print(my_list)