def get(self, pos):
        if pos < 0:
            raise ValueError('pos must great or equal zero!')

        if self.size >= pos:
            return False

        index, offset = self._get_offset(pos)
        return (self.array[index] & (1 << offset)) != 0
dataset/ETHPy150Open douban/dpark/dpark/bitindex.py/BitIndex.get/swapped operands of `>=`