code: def hashtags(self, quantity: int = 4) -> Union[str, list]:
          
          tags = ['#' + self.random.choice(HASHTAGS)
                  for _ in range(quantity)]
  
          if int(quantity) == 1:
              return tags[0]
  
          return tags
docs: Generate a list of hashtags.
  
          :param quantity: The quantity of hashtags.
          :return: The list of hashtags.
          :raises NonEnumerableError: if category is not in Hashtag.
  
          :Example:
              ['#love', '#sky', '#nice']