CrawlSpiders类
创建爬虫：
scrapy genspider -t crawl tencent tencent.com
from scrapy.linkextractors import LinkExtractor
link_list = LinkExtractor(allow=("start=\d+"))
link_list.extract_links(response)
scrapy框架CrawlSpiders类
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转载自www.cnblogs.com/xuezhihao/p/11646142.html
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