从python的html中提取2条信息
问题描述:
我需要帮助了解如何提取Grab和数据后面的数字-b。在完整未修改的网页中有许多<tr>
,我需要在</a>
之前使用“Need”进行过滤。我一直试图用美丽的汤做到这一点,虽然它看起来像lxml可能会更好地工作。我可以得到所有<tr>
或只有< a>...< /a>
行包含需要,但不只是<tr>
s包含需要在该<a>
行。从python的html中提取2条信息
<tr >
<td>3</td>
<td><a href="/local/app">Leave</a></td><td><a href="https://www.leave.com/" target="_blank">Useless</a></td>
<td class="text-right"> <span class="float2" data-a="24608000.0" data-b="518" data-n="818">Garbage</span></td>
<td class="text-right"> <span class="Float" data-a="3019" data-b="0.0635664" data-n="283">Garbage2</span></td>
<td class="text-right">7.38%</td>
<td class="text-right " >Recently</td>
</tr>
<tr >
<td>4</td>
<td><a href="/local">Grab</a></td><td><a href="https://grab.com" target="_blank">Need</a></td>
<td class="text-right"> <span class="bloat2" data="22435000.0" data-b="512" data-n="74491.2">More junk</span></td>
<td class="text-right"> <span class="bloat" data-a="301.177" data-b="35.848" data-n="0.5848">More junk2</span></td>
<td class="text-right">Some more</td>
<td class="text-right " >Recently</td>
</tr>
感谢您的帮助!
答
from bs4 import BeautifulSoup
data = '''<tr>
<td>3</td>
<td><a href="/local/app">Leave</a></td><td><a href="https://www.leave.com/" target="_blank">Useless</a></td>
<td class="text-right"> <span class="float2" data-a="24608000.0" data-b="518" data-n="818">Garbage</span></td>
<td class="text-right"> <span class="Float" data-a="3019" data-b="0.0635664" data-n="283">Garbage2</span></td>
<td class="text-right">7.38%</td>
<td class="text-right " >Recently</td>
</tr>
<tr>
<td>4</td>
<td><a href="/local">Grab</a></td><td><a href="https://grab.com" target="_blank">Need</a></td>
<td class="text-right"> <span class="bloat2" data="22435000.0" data-b="512" data-n="74491.2">More junk</span></td>
<td class="text-right"> <span class="bloat" data-a="301.177" data-b="35.848" data-n="0.5848">More junk2</span></td>
<td class="text-right">Some more</td>
<td class="text-right " >Recently</td>
</tr>
'''
soup = BeautifulSoup(data)
print(soup.findAll('a',{"href":"/local" })[0].text)
for a in soup.findAll('span',{"class":["bloat","bloat2"]}):
print(a['data-b'])