使用 BeautifulSoup 从标签中提取字符串

Question

我正在尝试从下方提取 table。我在第二个 <td> 之后删掉了它，后面还有六个。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

下面的代码只给了我第一个值，61.5。我怎样才能得到剩余的价值？

 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>

Answer 1

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

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，如果您希望它们作为浮点数：

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

Answer 2

 <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>

试试这个：

 temp = soup.select('div[class="value"]') 
 result = []
 for i in temp:
     result.append(i.get_text())

Answer 3

您将需要使用 find_all() 在 BeautifulSoup 中获取所有值。

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)
out=[]
for elem in soup.find_all("div", {"class":"value"}):
    out.append(elem.text)

使用 BeautifulSoup 从标签中提取字符串

Extract string from tag with BeautifulSoup

python

beautifulsoup