def _load_block(self, key):
        if self.currentblock is None or key < self.minkey or key > self.maxkey:
            bn = max(0, 1 - bisect_right(self.blockindex, key))
            self._load_block_num(bn)
dataset/ETHPy150Open tallstreet/Whoosh-AppEngine/src/whoosh/tables.py/TableReader._load_block/swapped operands of `-`