Python正則表達式提取標籤內的html文件內容

Question

我在文件夾中有很多html格式文件。我需要檢查它們是否包含這個標籤：

<strong>QQ</strong> 

而且只需要提取「QQ」及其內容。 我首先閱讀其中一個要測試的文件，但看起來我的正則表達式不匹配。 如果我取代fo_read作爲標籤

<strong>QQ</strong> 

它將雖然相匹配。

fo = open('4251-fu.html', "r") 
fo_read = fo.read() 
m = re.search('<strong>(QQ)</strong>', fo_read) 
if m: 
    print 'Match found: ', m.group(1) 
else: 
    print 'No match' 
fo.close() 

Answer 1

result = soup.find("strong", string=re.compile("Question-and-Answer Session")) 
if result: 
    print("Question-and-Answer Session") 
    # for the rest of text in the parent 
    rest = result.parent.text.split("Question-and-Answer Session")[-1].strip() 
    print(rest) 
else: 
    print("no match") 

Answer 2

你可以用BeautifulSoup嘗試：

from bs4 import BeautifulSoup 
f = open('4251-fu.html',mode = 'r') 
soup = BeautifulSoup(f, 'lxml') 
search_result = [str(e) for e in soup.find_all('strong')] 
print search_result 
if '<strong>Question-and-Answer Session</strong>' in search_result: 
    print 'Match found' 
else: 
    print 'No match' 
f.close() 

輸出：

['<strong>Question-and-Answer Session1</strong>', '<strong>Question-and-Answer Session</strong>', '<strong>Question-and-Answer Session3</strong>'] 
Match found