我想返回URL的'a'，而不是整个URL

Question

如何让当前代码返回链接的“a”而不是整个链接。下面是我如何返回整个链接，但我只想要'a'。你知道吗

item ['Url'] = response.url 

例如http://international.southwales.ac.uk/country/iran/en/就是“伊朗”。你知道吗

from scrapy.spider import BaseSpider
from project.items import QualificationItem
from scrapy.selector import HtmlXPathSelector
from scrapy.http.request import Request
from urlparse import urljoin


USER_AGENT = 'Mozilla/5.0 (X11; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0'

class recursiveSpider(BaseSpider):
name = 'usw1'
allowed_domains = ['international.southwales.ac.uk''eu.southwales.ac.uk/']
start_urls = ['http://international.southwales.ac.uk/countries']

def parse(self, response):
    hxs = HtmlXPathSelector(response)
    xpath = '/html/body/div[1]/div[4]/div[2]/ul/li/a/@href'
    for link in hxs.select(xpath).extract():
        yield Request(urljoin(response.url, link),
                      headers={'User-Agent': USER_AGENT},
                      callback=self.parse_linkpage,
                      dont_filter=True)

def parse_linkpage(self, response):
    hxs = HtmlXPathSelector(response)
    item = QualificationItem()
    xpath = """
            //h4[normalize-space(.)="Entry Requirements - Undergraduate"]
             /following-sibling::ul/li
            """
    item['Qualification'] = hxs.select(xpath).extract()[0:1]
    item['Url'] = response.url

    return item

Answer 1

这可以通过使用请求调用的meta属性来实现。文档here谈到了它。你知道吗

将parse方法更改为：

def parse(self, response):
    hxs = HtmlXPathSelector(response)
    xpath = '/html/body/div[1]/div[4]/div[2]/ul/li/a/@href'
    a_of_the_link = '/html/body/div[1]/div[4]/div[2]/ul/li/a/text()'
    for text, link in zip(hxs.select(a_of_the_link).extract(), hxs.select(xpath).extract()):
        yield Request(urljoin(response.url, link),  meta={'a_of_the_link': text},
                          headers={'User-Agent': USER_AGENT},
                          callback=self.parse_linkpage,
                          dont_filter=True)

您可以在parse_item中访问：

item['Url'] = response.meta['a_of_the_link']

希望这有帮助