python - Scrapy 荣誉 rel=nofollow

Question

scrapy 可以忽略 rel="nofollow" 链接吗？ 看着 sgml.py在 scrapy 0.22 中看起来是这样的:

如何启用它？

Answer 1

Paul 说对了，我就是这样做的:

rules = (
# Extract all pages, follow links, call method 'parse_page' for response callback, before processing links call method links_processor
Rule(LinkExtractor(allow=('','/')),follow=True,callback='parse_page',process_links='links_processor'),

这是实际的功能(我是 python 的新手，我确信有一种更好的方法可以在不创建新列表的情况下从 for 循环中删除项目

def links_processor(self,links): 
 # A hook into the links processing from an existing page, done in order to not follow "nofollow" links 
 ret_links = list()
 if links:
 for link in links:
 if not link.nofollow: ret_links.append(link)
 return ret_links

很简单。