Question

我想在RSS feed描述标签中获取图像链接。

使用feedparser在discription标签中获取了值。但是我想在该标签中获取图像链接。

<description><![CDATA[<div class="K2FeedImage"><img src="https://srilankamirror.com/media/k2/items/cache/25a3bb259efa21fc96901ad625f3a85d_S.jpg" alt="MP Piyasena sentenced to 4 years in prison" /></div><div class="K2FeedIntroText"><p>Former Tamil National Alliance (TNA) parliamentarian, P. Piyasena has been sentenced to 4 years in prison and fined Rs.</p>
</div><div class="K2FeedFullText">
<p>5.4 million for using state-owned vehicle for an year after losing his parliamentary seat.</p></div>]]></description>

然后我尝试用他的方式在python中使用子字符串。

import re

text =  "<![CDATA[<img src='https://adaderanaenglish.s3.amazonaws.com/' width='60' align='left' hspace='5'/>Former Tamil National Alliance (TNA) MP P. Piyasena had been sentenced to 4 years in prison over a case of misusing a state vehicle after losing his MP post. MORE..]]>"

match = re.search("<img src=\"(.+?) \"", text, flags=re.IGNORECASE)

try:
    result = match.group(1)
except:
    result = "no match found"

print(result)

C：/用户/华硕/台式机/无标题/a.py


未找到匹配项


以退出代码0结束的过程

Answer 1

您需要稍微更改正则表达式才能使其正常工作。您想要的是在src=之后获得内容，并在遇到'字符时立即停止（惰性搜索）。因此，您的正则表达式应为：

match = re.search("src='+(.*?)'",text)

您可以访问this来帮助您使用正则表达式。

Answer 2

您也可以使用split。这完全取决于您已经隔离了问题中提到的正确标签。因此，您正在使用text。

text = '''
<description><![CDATA[<div class="K2FeedImage"><img src="https://srilankamirror.com/media/k2/items/cache/25a3bb259efa21fc96901ad625f3a85d_S.jpg" alt="MP Piyasena sentenced to 4 years in prison" /></div><div class="K2FeedIntroText"><p>Former Tamil National Alliance (TNA) parliamentarian, P. Piyasena has been sentenced to 4 years in prison and fined Rs.</p>
</div><div class="K2FeedFullText">
<p>5.4 million for using state-owned vehicle for an year after losing his parliamentary seat.</p></div>]]></description>
'''

link = text.split('src="')[1].split('"')[0] 
print(link)

Answer 3

您可以获得不带正则表达式的图像链接，请尝试以下代码，它将首先找到next_element然后再次获取汤以获取图像链接。

from bs4 import BeautifulSoup

data='''<description><![CDATA[<div class="K2FeedImage"><img src="https://srilankamirror.com/media/k2/items/cache/25a3bb259efa21fc96901ad625f3a85d_S.jpg" alt="MP Piyasena sentenced to 4 years in prison" /></div><div class="K2FeedIntroText"><p>Former Tamil National Alliance (TNA) parliamentarian, P. Piyasena has been sentenced to 4 years in prison and fined Rs.</p>
</div><div class="K2FeedFullText">
<p>5.4 million for using state-owned vehicle for an year after losing his parliamentary seat.</p></div>]]></description>'''

soup=BeautifulSoup(data,'html.parser')
item=soup.find('description')
data1=item.next_element
soup1=BeautifulSoup(data1,'html.parser')
print(soup1.find('img')['src'])

输出：

https://srilankamirror.com/media/k2/items/cache/25a3bb259efa21fc96901ad625f3a85d_S.jpg

我想在RSS feed描述标签中获取图像链接

3 个答案: