Scrapy HtmlXPathSelector

Question

只是尝试scrapy并尝试让一个基本的蜘蛛工作。我知道这可能是我缺少的东西，但我已经尝试了我能想到的一切。

我得到的错误是:

line 11, in JustASpider
    sites = hxs.select('//title/text()')
NameError: name 'hxs' is not defined

我的代码目前非常基本，但我似乎仍然无法找到我出错的地方。谢谢你的帮助!

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector

class JustASpider(BaseSpider):
    name = "google.com"
    start_urls = ["http://www.google.com/search?hl=en&q=search"]


    def parse(self, response):
        hxs = HtmlXPathSelector(response)
        sites = hxs.select('//title/text()')
        for site in sites:
            print site.extract()


SPIDER = JustASpider()

Answer 1

代码看起来很旧。我建议改用这些代码

from scrapy.spider import Spider
from scrapy.selector import Selector

class JustASpider(Spider):
    name = "googlespider"
    allowed_domains=["google.com"]
    start_urls = ["http://www.google.com/search?hl=en&q=search"]


    def parse(self, response):
        sel = Selector(response)
        sites = sel.xpath('//title/text()').extract()
        print sites
        #for site in sites: (I dont know why you want to loop for extracting the text in the title element)
            #print site.extract()

希望它有所帮助和 here是一个很好的榜样。