def __get_expires_seconds(self, expires):
        if isinstance(expires, numbers.Real):
            return int(expires)
        elif isinstance(expires, datetime.datetime):
            now = datetime.datetime.utcnow()
            return int((now - expires).total_seconds())
        else:
            return 0
dataset/ETHPy150Open MitchellChu/torndsession/torndsession/memcachedsession.py/MemcachedSession.__get_expires_seconds/swapped operands of `-`