python redis pipeline 秒杀

秒杀方法

def sell(product_id: str):
    with r.pipeline() as pipe:  # 初始化 pipe
        while True:
            try:
                pipe.watch(product_id)  # 监听库存
                c = int(pipe.get(product_id))  # 查看当前库存
                if c > 0:  # 有库存则售卖
                    pipe.multi()  # 开始事务
                    c -= 1
                    pipe.set(product_id, c)  # 减少库存
                    pipe.execute()  # 执行事务
                    return True
                else:
                    return False
            except Exception as e:
                continue
            finally:
                # 重置 pipe，准备下次抢购
                pipe.reset()

多线程工具

class BaseThread(Thread):
    """封装异步多线程工具"""

    def __init__(self, func, *args, **kwargs):
        super(BaseThread, self).__init__()
        self.func = func
        self._args = args
        self._kwargs = kwargs

    def run(self):
        self.func(*self._args, **self._kwargs)