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" + "\n" +" 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 )