The is a re-implementation of the Scrapy spider tutorial using HtmlCSSSelector

pyquery-spider.py

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlCSSSelector

class DmozSpiderCSS(BaseSpider):
    name = "pyquery"
    allowed_domains = ["dmoz.org"]
    start_urls = [
       "http://www.dmoz.org/Computers/Programming/Languages/Python/Books/",
       "http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/"
    ]

    def parse(self, response):
        hcs = HtmlCSSSelector(response)
        sites = hcs.select('ul li')
        for site in sites:
            links = site.select('a')
            if len(links):
                title = links[0].text_content()
                link = links[0].get('href')
                desc = site.text_content()
                print title, link, desc

I think some method same name with jquery may be better。ex: links[0].text() links[0].attr('href')。