我有一个HTML表格,看起来像这样:
<table border=0 cellspacing=1 cellpadding=2 class=form>
<tr class=form><td class=formlabel>Heating Coils in Bunker Tanks</td><td class=form>N</td></tr>
<tr class=forma><td class=formlabel>Heating Coils in Cargo Tanks</td><td class=form>U</td></tr>
<tr class=form><td class=formlabel>Manifold Type</td><td class=form>N</td></tr>
<tr class=forma><td class=formlabel>No. Holds</td><td class=form>5</td></tr>
<tr class=form><td class=formlabel>No. Centreline Hatches</td><td class=form>5</td></tr>
<tr class=forma><td class=formlabel>Lifting Gear</td><td class=form>Yes</td></tr>
<tr class=form><td class=formlabel>Gear</td><td class=form>4 Crane (30.5t SWL)</td></tr>
<tr class=forma><td class=formlabel>Alteration</td><td class=form>Unknown</td></tr>
</table>
我正在使用美丽的汤来提取特定数据,这些数据来自刮擦蜘蛛的响应
soup = BeautifulSoup(response.body_as_unicode())
table= soup.find('table', {'class': 'form'})
# psusedo code find manifold type and number of Holds
我该怎么做。请注意,值的顺序可能会更改,但表单标签始终保持不变?如何使用特定的表单标签进行搜索?
编辑:
<tr class=forma><td class=formlabel>Fleet Manager (Operator)</td><td class=form><a href="oBasic.asp?LRNumber=9442964&Action=Display&LRCompanyNumber=40916">ESSAR SHIPPING LTD</a></td></tr>
此特殊情况不适用于以下同级搜索?如何克服这一点?
您可以通过文本找到td
元素并获取下一个同级:
table.find('td', text='Manifold Type').next_sibling.text
作为旁注,为什么您需要在 Scrapy 蜘蛛中使用BeautifulSoup
? Scrapy
本身在HTML解析,定位元素方面非常强大:
response.xpath('//table[@class="form"]//td[.="Manifold Type"]/following-sibling::td/text()')
scrapy shell
演示:
$ scrapy shell index.html
In [1]: response.xpath('//table[@class="form"]//td[.="Manifold Type"]/following-sibling::td/text()').extract()
Out[1]: [u'N']