如何使用 Beautiful Soup 按跨度类提取准确信息

Question

这是我的价格监控代码的代码和输出：

soup = BeautifulSoup(page.content, 'html.parser')

title = soup.find(id="result_0_name").get_text()
price = soup.find("span", class_ = "normal_price")
#converted_price = price[0:3]

print(price.get_text())
print(title.strip())

输出如下

Starting at:
$0.70 USD
$0.67 USD

Operation Broken Fang Case

页面的html也是这样

<span class="market_table_value normal_price">Starting at:<br/>
<span class="normal_price" data-currency="1" data-price="69">$0.69 USD</span>
<span class="sale_price">$0.66 USD</span>
</span>

您可以看到没有 ID，所以我不能使用它，我只想显示“normal_price”而不是该范围内的其他数据。有什么想法吗？

Answer 1

只需使跨度的选择更具体，例如使用它是元素中的元素这一事实：

soup.select_one('span > span.normal_price').get_text()

示例

from bs4 import BeautifulSoup

html='''
<span class="market_table_value normal_price">
                    Starting at:<br/>
<span class="normal_price" data-currency="1" data-price="69">$0.69 USD</span>
<span class="sale_price">$0.66 USD</span>
</span>
'''
soup = BeautifulSoup(html,'html.parser')

price = soup.select_one('span > span.normal_price').get_text()

price

输出

$0.69 USD

Answer 2

你也可以这样试试

from bs4 import BeautifulSoup
html ="""<span class="market_table_value normal_price">
                    Starting at:<br/>
<span class="normal_price" data-currency="1" data-price="69">$0.69 USD</span>
<span class="sale_price">$0.66 USD</span>
</span>"""

soup = BeautifulSoup(html, 'html.parser')

using attribute
price = soup.select_one('span[data-currency="1"]').get_text()
exact attribute
price = soup.select_one('span[data-currency^="1"]').get_text()

print(price) #$0.69 USD