Scrapy: Extract links and text

问题

I am new to scrapy and I am trying to scrape the Ikea website webpage. The basic page with the list of locations as given here.

My items.py file is given below:

import scrapy


class IkeaItem(scrapy.Item):

    name = scrapy.Field()
    link = scrapy.Field()

And the spider is given below:

import  scrapy
from ikea.items import IkeaItem
class IkeaSpider(scrapy.Spider):
    name = 'ikea'

    allowed_domains = ['http://www.ikea.com/']

    start_urls = ['http://www.ikea.com/']

    def parse(self, response):
        for sel in response.xpath('//tr/td/a'):
            item = IkeaItem()
            item['name'] = sel.xpath('a/text()').extract()
            item['link'] = sel.xpath('a/@href').extract()

            yield item

On running the file I am not getting any output. The json file output is something like:

[[{"link": [], "name": []}

The output that I am looking for is the name of the location and the link. I am getting nothing. Where am I going wrong?

回答1:

There is a simple mistake inside the xpath expressions for the item fields. The loop is already going over the a tags, you don't need to specify a in the inner xpath expressions. In other words, currently you are searching for a tags inside the a tags inside the td inside tr. Which obviously results into nothing.

Replace a/text() with text() and a/@href with @href.

(tested - works for me)

回答2:

use this....

    item['name'] = sel.xpath('//a/text()').extract()
    item['link'] = sel.xpath('//a/@href').extract()

来源：https://stackoverflow.com/questions/27753232/scrapy-extract-links-and-text