找到正确的XPath

Question

我想从page找到正确的XPath的字符串

“胶体系统调查聚合物Stabilsation使用新型场理论模拟”一个项目和字符串的其他产品“由人ES和iPS细胞的造血干细胞“

name = 'lianjia' 
allowed_domains = ["gepris.dfg.de/gepris/"] 
start_urls =['http://gepris.dfg.de/gepris/institution/5000', 'http://gepris.dfg.de/gepris/institution/5008'] 
My Scrapy program is 
    def parse(self, response): 
     for sel in response.xpath("//div[@id='detailseite']"):   
      lianjia = lianjiaItem() 
      lianjia['item1'] = sel.xpath("").extract() 
      lianjia['item2'] = sel.xpath("").extract() 

Answer 1

lianjia['item1'] = sel.xpath("//li[@id=4]/ul/li/ul/li[1]/div/div/a/text()").extract() 
lianjia['item2'] = sel.xpath("//li[@id=4]/ul/li/ul/li[2]/div/div/a/text()").extract()