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定时爬取

你好,看到你说明中提到可以进行定期爬取内容,在代码中没有找到。我也遇到了这个问题 ,使用这种方法
d = runner.crawl(spider)
d.addBoth(lambda _: reactor.stop()),执行完成后下个时间 点后开始后会报错,twisted.internet.error.ReactorNotRestartable求解

这里的session_scope是干什么的呢?

python3不支持吗?python3环境下运行错误

 a = Article(url=item["url"],
                    title=item["title"].encode("utf-8"),
                    publish_time=item["publish_time"].encode("utf-8"),
                    body=item["body"].encode("utf-8"),
                    source_site=item["source_site"].encode("utf-8"))
        with session_scope(self.Session) as session: #这里
            session.add(a)

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