code: def compare_stacks(cards_x, cards_y, sorted=False):
      
      if len(cards_x) == len(cards_y):
          if not sorted:
              cards_x = sort_cards(cards_x, DEFAULT_RANKS)
              cards_y = sort_cards(cards_y, DEFAULT_RANKS)
          for i, c in enumerate(cards_x):
              if c != cards_y[i]:
                  return False
          return True
      else:
          return False
docs: Checks whether two given ``Stack``, ``Deck``, or ``list`` instances,
      contain the same cards (based on value & suit, not instance). Does not
      take into account the ordering.
  
      :arg cards_x:
          The first stack to check. Can be a ``Stack``, ``Deck``, or ``list``
          instance.
      :arg cards_y:
          The second stack to check. Can be a ``Stack``, ``Deck``, or ``list``
          instance.
      :arg bool sorted:
          Whether or not the cards are already sorted. If ``True``, then
          ``compare_stacks`` will skip the sorting process.
  
      :returns:
          ``True`` or ``False``.