@property
def buy_quantity(self):
    '\n        [int] 买方向持仓\n        '
    return (self.buy_old_quantity + self.buy_today_quantity)
[int] 买方向持仓
@property
def buy_quantity(self):
    '\n        \n        '
    return (self.buy_old_quantity + self.buy_today_quantity)