@property
def buy_today_quantity(self):
    '\n        [int] 买方向今仓\n        '
    return sum((amount for (price, amount) in self._buy_today_holding_list))
[int] 买方向今仓
@property
def buy_today_quantity(self):
    '\n        \n        '
    return sum((amount for (price, amount) in self._buy_today_holding_list))