63讲scrapy的xpath出问题

丁文超

代码如下：

1. import scrapy
   
2. 
   
3. class DmozSpider(scrapy.Spider):
   
4.         name = "dmoz"
   
5.         allowed_domains = ['domztools.net']
   
6.         start_urls = [
   
7.             'http://www.dmoztools.net/Computers/Programming/Languages/Python/Books/',
   
8.             'http://www.dmoztools.net/Computers/Programming/Languages/Python/Resources/'
   
9.             ]
   
10.         
    
11.         def parse(self,response):
    
12.            sel = xpath.selector.Selector(response)
    
13.            sites = sel.xpath('//div[@class="title-and-desc"]/a')
    
14.            for site in sites:
    
15.                 title = site.xpath('div/text()').extract()
    
16.                 link = site.xpath('div/@href').extract()
    
17.                 desc = site.xpath('div[@class="title-and-desc"]/text()').extract()
    
18.                 print(title,link.desc)
    
19. 
    

复制代码

但是在cmd中运行时出现如下错误：

Traceback (most recent call last):
  File "e:\python36\lib\site-packages\twisted\internet\defer.py", line 653, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "C:\Users\dwc\Desktop\scr1\scr1\spiders\dmoz_spider.py", line 12, in parse
    sel = xpath.selector.Selector(response)
NameError: name 'xpath' is not defined
2017-12-11 20:10:01 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://www.dmoztools.net/Computers/Programming/Languages/Python/Resources/> (referer: None)
2017-12-11 20:10:01 [scrapy.core.scraper] ERROR: Spider error processing <GET http://www.dmoztools.net/Computers/Programming/Languages/Python/Resources/> (referer: None)
Traceback (most recent call last):
  File "e:\python36\lib\site-packages\twisted\internet\defer.py", line 653, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "C:\Users\dwc\Desktop\scr1\scr1\spiders\dmoz_spider.py", line 12, in parse
    sel = xpath.selector.Selector(response)
NameError: name 'xpath' is not defined

求大佬解答，谢谢

ド゛゜范

sites = response.xpath ('//div[@class="title-and-desc"]/a')

taotao0325

sel = xpath.selector.Selector(response)

->
sel = scrapy.selector.Selector(response)