我正试图从这个网站中提取下图中用红色圈出的元素： https://eresearch.fidelity.com/eresearch/markets_sectors/sectors_in_market.jhtml？tab=learn§or=25

但是，它总是给我一个错误“ResultSet对象没有属性'find'。您可能将一个元素列表视为单个元素。当您打算调用find（）时，是否调用了find_all()？”

我的想法是将搜索范围缩小到“td”标记，并使用find从“span”标记中获取元素，但我就是无法使其工作。我尝试使用find（）和find_all()，但都给我带来了这个错误，下面是我的代码:

from bs4 import BeautifulSoup
url = "https://eresearch.fidelity.com/eresearch/markets_sectors/sectors/sectors_in_market.jhtml? 
tab=learn&sector=25"
response = requests.get(url)
soup = BeautifulSoup(response.content,'lxml')
b = soup.select('div.left-content table.snapshot-data-tbl tr td') 
print(b.find("span", class_='positive').text) 

我能得到一些帮助吗？谢谢！

顺晟科技：

返回一个容器，其中包含来自提供的CSS选择器的匹配项。方法只能应用于页源中的元素节点，而不能应用于结果集。相反，您可以遍历的结果从目标s:

from bs4 import BeautifulSoup
url = "https://eresearch.fidelity.com/eresearch/markets_sectors/sectors/sectors_in_market.jhtml? 
tab=learn&sector=25"
response = requests.get(url)
soup = BeautifulSoup(response.content,'lxml')
b = soup.select('div.left-content table.snapshot-data-tbl tr td') 
print(b.find("span", class_='positive').text) 

输出:

from bs4 import BeautifulSoup
url = "https://eresearch.fidelity.com/eresearch/markets_sectors/sectors/sectors_in_market.jhtml? 
tab=learn&sector=25"
response = requests.get(url)
soup = BeautifulSoup(response.content,'lxml')
b = soup.select('div.left-content table.snapshot-data-tbl tr td') 
print(b.find("span", class_='positive').text) 

通常，如果可能的话，通过较长的CSS选择器按类或id查找元素会更干净。在本例中，您需要的数据位于前3个td元素中的class=“snapshot-data-tbl”的表中。

这里有另一个提取值的解决方案:

from bs4 import BeautifulSoup
url = "https://eresearch.fidelity.com/eresearch/markets_sectors/sectors/sectors_in_market.jhtml? 
tab=learn&sector=25"
response = requests.get(url)
soup = BeautifulSoup(response.content,'lxml')
b = soup.select('div.left-content table.snapshot-data-tbl tr td') 
print(b.find("span", class_='positive').text)