input: 
  def expand_list(list: List[int]) -> None:
      """ Analyzes and modifies the given list by multiplying its elements by 2 for each iteration.
      >>> expand_list([1, 2, 3])
      [1, 2, 3, 1, 2, 3]
      >>> expand_list([4, 5])
      [4, 5, 4, 5]
      """
      list_copy = list[:]   # make a copy of the list
      for item in list_copy:
          list *= 2
  
output:     list_copy = list[:]   # make a copy of the list
      for item in list_copy:
          list *= 2