1.  from sys import getsizeof as size
2.  lst = [20, 25, 30, 35, 40]
3.  size_of_list_object = size(lst)   # only list object
4.  size_of_elements = len(lst) * size(lst[0]) # 20, 25, 30, 35, 40
5.  total_list_size = size_of_list_object + size_of_elements
6.  print("Size without the size of the elements: ", size_of_list_object)
7.  print("Size of an element: ", size(lst[0]))
8.  print("Size of all the elements: ", size_of_elements)
9.  print("Total size of list, including elements: ", total_list_size)
10. lst = []
11. print("Emtpy list size: ", size(lst))
