def __get_list_item(self, item):
    if item == 0:
      raise IndexError
    if item < 0:
      return self._list[item]
    return self._list[1 - item]
dataset/ETHPy150Open pantsbuild/pants/contrib/python/src/python/pants/contrib/python/checks/tasks/checkstyle/common.py/OffByOneList.__get_list_item/swapped operands of `-`