func_code: def swap_unique_keys_values(my_dict):
      seen = []
      unseen = []
      for key in list(my_dict.keys()):
          value = my_dict[key]
          if value in seen:
              unseen.append(value)
          else:
              seen.append(value)
      new_dict = {k: v for k, v in list(my_dict.items()) if v not in unseen}
      new_dict = {y: x for x, y in list(new_dict.items())}
      return new_dict