使用BeautifulSoup从标签中提取字符串 [英] Extract string from tag with BeautifulSoup

问题描述

我正在尝试从下表中提取内容.我在第二个<td>之后剪切了它，之后又剪切了六个.需要提取所有八个字符串，例如在下面的示例中，我想要值61.5，56.43等

I am trying to extract from below table. I cut it after the second <td>, with six more to follow. All eight strings need to be extracted, e.g. in the example below I would want the values 61.5, 56.43, etc.

下面的代码仅给我第一个值61.5.我如何获得剩余的价值?

The code below only gives me the first value, 61.5. How can I get the remaining values?

 soup.find("div", {"class":"value"}).text


<td class="flow">
    <div class="heading" style="min-height: 63px;">Dornum</div>
    <div class="data"><div class="value">61.5</div> MSm<sup>3</sup>/d</div>
</td>
<td class="flow">
    <div class="heading" style="min-height: 63px;">Emden EMS</div>
    <div class="data"><div class="value">56.43</div> MSm<sup>3</sup>/d</div>
</td>

推荐答案

使用soup.find_all()获取匹配元素的列表，然后获取每个元素的text属性:

Use soup.find_all() to obtain a list of matching elements, then grab the text attribute for each element:

from bs4 import BeautifulSoup

html = '''<td class="flow">
    <div class="heading" style="min-height: 63px;">Dornum</div>
    <div class="data"><div class="value">61.5</div> MSm<sup>3</sup>/d</div>
</td>
<td class="flow">
    <div class="heading" style="min-height: 63px;">Emden EMS</div>
    <div class="data"><div class="value">56.43</div> MSm<sup>3</sup>/d</div>
</td>'''

soup = BeautifulSoup(html)

data = [element.text for element in soup.find_all("div", "value")]

>>> data
[u'61.5', u'56.43']

或者，如果您希望它们为浮点数:

Or, if you want them as floats:

data = [float(element.text) for element in soup.find_all("div", "value")]
>>> data
[61.5, 56.43]

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