code: def change_custom_seed(seed):
      
      if isinstance(seed, (basestring, list, tuple)):
          seed = Seed(seed)
      if isinstance(seed, Seed):
          CustomCarry.SEED_LIST = seed
docs: change CustomCarry seed
      example:
      change_custom_seed([1,2,3])  # then CustomCarry.SEED_LIST == '123' is True
      :param seed:
      :return: