python - BeautifulSoup 从 find 中获取属性

Question

我对 python 很陌生，所以首先抱歉，我想打印使用 beautifulsoup 的 find() 方法所做的选择的 href 内容，但我不能这样做，我也不知道为什么。我已经这样做了

from bs4 import BeautifulSoup
from requests import session

payload = {
    'btnSubmit': 'Login',
    'username': 'xxx',
    'password': 'xxx'
   }

 with session() as c:
     c.post('http://www.xxx.xxx/login.php', data=payload)
     request = c.get('http://www.xxx.xxx/xxxx')
     soup=BeautifulSoup(request.content)
     row_int=soup.find('td',attrs={'class' : 'rnr-cc rnr-bc rnr-icons'})
     print row_int['href']

但我有这个错误

Traceback (most recent call last):
File "<pyshell#14>", line 1, in <module>
execfile ('C:\Users\Francesco\Desktop\prova.py')
File "C:\Users\Francesco\Desktop\prova.py", line 15, in <module>
print row_int['href']
File "C:\Python27\lib\site-packages\bs4\element.py", line 905, in __getitem__
return self.attrs[key]
KeyError: 'href'

row_int的内容是这样的:

[<a class="rnr-button-img" data-icon="view" href="xxxxxxx" id="viewLink12" name="viewLink12" title="Details"></a>, u' ']

我哪里错了？

Answer 1

您需要从 td 标记内获取链接(a 元素):

row = soup.find('td', attrs={'class': 'rnr-cc rnr-bc rnr-icons'})
a = row.find('a', href=True)
if a:
    print a['href']

或者，用 CSS selector 来缩短:

for a in soup.select('td.rnr-cc.rnr-bc.rnr-icons a[href]'):
    print a['href']