code: def split_lines(lines):
      
      container = []
      new_list = []
      for line in lines:
          if '>>>' in line:
              container.append(new_list)
              new_list = []
          else:
              new_list.append(line)
      container.append(new_list)
      return container
docs: split a MagIC upload format file into lists.
      the lists are split by the '>>>' lines between file_types.