这是在BeautifulSoup中使用SoupStrainer类的一小段代码：
import httplib2
from BeautifulSoup import BeautifulSoup, SoupStrainer
http = httplib2.Http()
status, response = http.request('http://www.nytimes.com')
for link in BeautifulSoup(response, parse_only=SoupStrainer('a')):
if link.has_attr('href'):
print(link['href'])
602392714
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