stats.py 文件源码

def from_crawler(cls, crawler):
        ext = cls(crawler.stats)
        crawler.signals.connect(ext.spider_opened,
                                signal=signals.spider_opened)
        crawler.signals.connect(ext.spider_closed,
                                signal=signals.spider_closed)
        crawler.signals.connect(ext.item_scraped,
                                signal=signals.item_scraped)

        return ext