Python 刮痧蜘蛛:它是怎么工作的?
这是Scrapy教程中的BaseSpider示例:Python 刮痧蜘蛛:它是怎么工作的?,python,web-crawler,scrapy,Python,Web Crawler,Scrapy,这是Scrapy教程中的BaseSpider示例: from scrapy.spider import BaseSpider from scrapy.selector import HtmlXPathSelector from dmoz.items import DmozItem class DmozSpider(BaseSpider): domain_name = "dmoz.org" start_urls = [ "http://www.dmoz.org/Com
from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from dmoz.items import DmozItem
class DmozSpider(BaseSpider):
domain_name = "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):
hxs = HtmlXPathSelector(response)
sites = hxs.select('//ul[2]/li')
items = []
for site in sites:
item = DmozItem()
item['title'] = site.select('a/text()').extract()
item['link'] = site.select('a/@href').extract()
item['desc'] = site.select('text()').extract()
items.append(item)
return items
SPIDER = DmozSpider()
我复制了它,并对我的项目进行了更改:
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import HtmlXPathSelector
from scrapy.item import Item
from firm.items import FirmItem
class Spider1(CrawlSpider):
domain_name = 'wc2'
start_urls = ['http://www.whitecase.com/Attorneys/List.aspx?LastName=A']
def parse(self, response):
hxs = HtmlXPathSelector(response)
sites = hxs.select('//td[@class="altRow"][1]/a/@href').re('/.a\w+')
items = []
for site in sites:
item = FirmItem
item['school'] = hxs.select('//td[@class="mainColumnTDa"]').re('(JD)(.*?)(\d+)')
items.append(item)
return items
SPIDER = Spider1()
我得到了错误
[wc2] ERROR: Spider exception caught while processing
<http://www.whitecase.com/Attorneys/List.aspx?LastName=A> (referer: <None>):
[Failure instance: Traceback: <type 'exceptions.TypeError'>:
'ItemMeta' object does not support item assignment
[wc2]错误:处理时捕获到爬行器异常
(参考资料:):
[失败实例:回溯::
“ItemMeta”对象不支持项分配
如果这里的专家能看一下代码,给我一个关于哪里出错的线索,我将不胜感激
谢谢您的意思可能是
item=FirmItem()
而不是item=FirmItem
?请注意,如果使用ItemLoader,您会遇到相同的错误(参数item是item实例,而不是item类)