Enable and configure the AutoThrottle extension(启用限速,防止爬取过快)



Def open_spider(self,spider):#在爬虫开启的时候执行,仅执行一次

Self.file = open(spider.settings.get(“SAVE_FILE”,”./temp.json”),’w’)

Def close_spider(self,spider):#爬虫关闭时候执行,仅执行一次



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