Question

我试图找到所有h3 class =＆＃34; threadtitle＆＃34;在这个元素中，如果有文字＆＃34; NSW＆＃34;返回＆lt;的值一个＆GT;元件。

<h3 class="threadtitle">
    <img border="0" alt="MARKET PLACE/AUCTIONS" src="vbcover/ibid/images/auction_open.png" title="MARKET PLACE/AUCTIONS">
    <span class="prefix understate">
        <b>
            <font size="2" face="arial" color="#0000FF">NSW</font>
        </b>
    </span>
    <a id="thread_title_1234" class="title" href="showthread.php?t=1234">Banana man</a>
</h3>

这是我到目前为止所做的：我可以找到这样的单个元素：

import requests
from lxml import etree, html
response '''
<h3 class="threadtitle">
    <img border="0" alt="MARKET PLACE/AUCTIONS" src="vbcover/ibid/images/auction_open.png" title="MARKET PLACE/AUCTIONS">
    <span class="prefix understate">
        <b>
            <font size="2" face="arial" color="#0000FF">NSW</font>
        </b>
    </span>
    <a id="thread_title_1234" class="title" href="showthread.php?t=1234">Banana man</a>
</h3>
'''
tree = html.fromstring(response.text)
test = tree.xpath("//font[text()='NSW']")
#or
test2 = tree.xpath("//h3[@class='threadtitle']")

for i in test:
    print i

NSW

但我不知道如何将这些结合起来。

上面的例子应该返回香蕉人＆＃39;

Answer 1

试试这个xpath：

//h3[@class='threadtitle'][descendant::font/text() = 'NSW']/a/text()

Python xpath和条件

1 个答案: