python 抓取网页

#urllib2
wp = urllib2.urlopen(self.url)
content = wp.read();

pycurl

buf = cStringIO.StringIO()
         
        	c = pycurl.Curl()
        	c.setopt(c.URL,self.url)
        	c.setopt(c.WRITEFUNCTION, buf.write)
        	c.perform()
         	
        	content =  buf.getvalue()
        	buf.close()        
    
    
    	   
            jc = json.loads(content)

# 设置超时时间为30秒  
import socket  
socket.setdefaulttimeout(30)