Python爬虫：Scrapy链接解析器LinkExtractor返回Link对象

LinkExtractor

from scrapy.linkextractors import LinkExtractor

Link

from scrapy.link import Link

Link四个属性

url text fragment nofollow

如果需要解析出文本，需要在 LinkExtractor 的参数中添加参数：​​attrs​​

link_extractor = LinkExtractor(attrs=('href','text'))

links = link_extractor.extract_links(response)

使用示例

import scrapy

from scrapy.linkextractors import LinkExtractor


class DemoSpider(scrapy.Spider):
    name = 'spider'


    start_urls = [
        "https://book.douban.com/"
    ]

    def parse(self, response):
        # 参数是正则表达式
        link_extractor = LinkExtractor(allow="https://www.tianyancha.com/brand/b.*")

        links = link_extractor.extract_links(response)

        for link in links:
            print(link.text, link.url)


if __name__ == '__main__':
    cmdline.execute("scrapy crawl spider".split())