如果allowed_domains = ['https://blog.scrapinghub.com/']这么写的话 yield Request时不会调用callback方法;只能写为allowed_domains = ['blog.scrapinghub.com']
下图中的虽然调用了yield scrapy.Request(link.url, callback=self.parse),但并不会再次代用parse方法
如果allowed_domains = ['https://blog.scrapinghub.com/']这么写的话 yield Request时不会调用callback方法;只能写为allowed_domains = ['blog.scrapinghub.com']
下图中的虽然调用了yield scrapy.Request(link.url, callback=self.parse),但并不会再次代用parse方法