我已经为这只蜘蛛工作了好几个月了,也遇到了同样的问题——有人能帮我吗?
在上面提到的网站上(见下文),除了粗体的“型号名称”之外,所有的仪器数据都被删除了。这让人恼火,我不知道该怎么做。
import re
import json
from urlparse import urlparse
from scrapy.selector import Selector
try:
from scrapy.spider import Spider
except:
from scrapy.spider import BaseSpider as Spider
from scrapy.utils.response import get_base_url
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors import LinkExtractor
from scrapy.selector import HtmlXPathSelector
from database.items import databaseItem
from scrapy.log import *
class CommonSpider(CrawlSpider):
name = 'brands.py'
allowed_domains = ['usedprice.com']
start_urls = ['http://www.usedprice.com/items/guitars-musical-instruments/index.html']
rules = (
Rule(LinkExtractor(allow=( )), callback='parse_item'),
)
def parse_item(self, response):
hxs = HtmlXPathSelector(response)
item = databaseItem()
datao = datao = hxs.xpath('//tr[@class="oddItemColor baseText"]')
datae = datae = hxs.xpath('//tr[@class="evenItemColor baseText"]')
tmpNextPage = hxs.xpath('//div[@class="baseText blue"]/span[@id="pnLink"]/a/@href').extract()
for attr in datao:
*modelInfo = attr.xpath('.//b/text()').extract()*
instrInfo = attr.xpathxpath('.//td//text()').extract()
item['modelInfo'].append = modelInfo
item['instrInfo'].append = instrInfo
return databaseItem(modelInfo = modelInfo[1:], instrInfo = instrInfo[2:])
for attr in datae:
*modelInfo = attr.xpath('.//b/text()').extract()*
instrInfo = attr.xpath('.//td//text()').extract()
item['modelInfo'].append = modelInfo
item['instrInfo'].append = instrInfo
return databaseItem(modelInfo = modelInfo[1:], instrInfo = instrInfo[2:])
你应该:
modelInfo
字段[0][1:] == []
yield
每个databaseItem
而不是返回它(我没有运行您的代码,但我确实查看了http://www.usedprice.com/items/guitars-musical-instruments/a-basses/index.html)
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