獲取div屬性val和div文本體

Question

以下是獲取div屬性值的小代碼。所有div名稱都與相同的attr名稱相同。

redditFile = urllib2.urlopen("http://www.bing.com/videos?q=owl") 
redditHtml = redditFile.read() 
redditFile.close() 
soup = BeautifulSoup(redditHtml) 

productDivs = soup.findAll('div', attrs={'class' : 'dg_u'}) 
for div in productDivs: 
    print div.find('div', {"class":"vthumb"})['smturl'] 
    #print div.find("div", {"class":"tl text-body"}) This print none rather then div text 

第一次印刷了一些網址（有時4,6,8等），然後

KeyError         Traceback (most recent call last) 
<ipython-input-34-cc950a8a84f7> in <module>() 
    26 productDivs = soup.findAll('div', attrs={'class' : 'dg_u'}) 
    27 for div in productDivs: 
---> 28  print div.find('div', {"class":"vthumb"})['smturl'] 
    29  print div.find("div", {"class":"tl text-body"}) 

/usr/local/lib/python2.7/dist-packages/bs4/element.pyc in __getitem__(self, key) 
    903   """tag[key] returns the value of the 'key' attribute for the tag, 
    904   and throws an exception if it's not there.""" 
--> 905   return self.attrs[key] 
    906 
    907  def __iter__(self): 

KeyError: 'smturl' 

所有div名稱相同與相同smturl ATTR的名字，爲什麼它給KeyError任何幫助嗎？

Answer 1

並非所有div都具有smturl屬性，所以您需要將該屬性添加到find調用中。 productDivs也不是所有元素都包含您正在尋找的div，因此我已經添加了測試，如果find返回None。

In [27]: for div in productDivs: 
    ....:  if div.find('div', {"class":"vthumb", 'smturl': True}) is not None: 
    ....:   print div.find('div', {"class":"vthumb", 'smturl': True})['smturl'] 
    ....: 
http://ts2.mm.bing.net/th?id=OMB.9hfZ6cCDfUWbpw&pid=2.1 
http://ts4.mm.bing.net/th?id=OMB1.n%2b12M8SoyFcsag&pid=2.1 
http://ts4.mm.bing.net/th?id=OMB.ev1wnIiszGjhUg&pid=2.1 
http://ts4.mm.bing.net/th?id=OMB.hDLa5PO07Chclw&pid=2.1 
http://ts2.mm.bing.net/th?id=OMB.xDT9H25QFJ2jBw&pid=2.1 
http://ts3.mm.bing.net/th?id=OMB.BULQolkxkaZ0uw&pid=2.1 
http://ts3.mm.bing.net/th?id=OMB.xp3c0DyKrfmB7Q&pid=2.1 
http://ts4.mm.bing.net/th?id=OMB.MxP9fUyaJCRyhw&pid=2.1 
http://ts4.mm.bing.net/th?id=OMB2.CWjPPKiJQc4z6w&pid=2.1 
http://ts1.mm.bing.net/th?id=OMB1.ZVKhvML3%2bPzM1w&pid=2.1 
http://ts1.mm.bing.net/th?id=OMB.SLn%2b0NwKeUdZXw&pid=2.1 
http://ts2.mm.bing.net/th?id=OMB.4HJqrT9pBevGlg&pid=2.1 
http://ts2.mm.bing.net/th?id=OMB2.HgWYR9sjPw6JlQ&pid=2.1 
http://ts1.mm.bing.net/th?id=OMB.RyBXWQ9sH9wThw&pid=2.1 
http://ts2.mm.bing.net/th?id=OMB2.Vf21EgXRXMcdfg&pid=2.1 
http://ts3.mm.bing.net/th?id=OMB2.BIb6qwbHniC1vw&pid=2.1 
http://ts3.mm.bing.net/th?id=OMB1.H9bwRYncKU380A&pid=2.1 
http://ts2.mm.bing.net/th?id=OM1.mBXeu55OD4VimQ&pid=2.1