beautifulsoup 4来了，支持python3.x

from bs4 import BeautifulSoup

from bs4 import BeautifulSoup as bs
res=ur.urlopen('http://www.hao123.com').read()
soup=bs(res)

for link in soup.findAll(attrs={'class':'sister'}):
print(link.get('id'))

for link in soup.findAll(id='link3'):
print (link)

for link in soup.find_all('a'):
print(link.text,link.get('href'))