python怎么获取网页内容

page = urllib2.urlopen(url) 
contents = page.read() 
#获得了整个网页的内容也就是源代码 
print(contents)

#coding:utf-8 
''''' 
@author: jsjxy 
''' 
import urllib2 
import re 
from bs4 import BeautifulSoup 
from distutils.filelist import findall 

page = urllib2.urlopen('http://movie.douban.com/top250?format=text') 
contents = page.read() 
 #print(contents) 
soup = BeautifulSoup(contents,"html.parser") 
print("豆瓣电影TOP250" + "
" +" 影片名 评分 评价人数 链接 ") 
for tag in soup.find_all('div', class_='info'): 
 # print tag 
 m_name = tag.find('span', class_='title').get_text() 
 m_rating_score = float(tag.find('span',class_='rating_num').get_text()) 
 m_people = tag.find('div',class_="star") 
 m_span = m_people.findAll('span') 
 m_peoplecount = m_span[3].contents[0] 
 m_url=tag.find('a').get('href') 
 print( m_name+" " + str(m_rating_score) + " " + m_peoplecount + " " + m_url )