记一点东西

cj = cookielib.CookieJar() 
url_login = 'http://example?action=login' 
params = (('username','ruyiqiane'), ('password', '******'))
opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) 
opener.addheaders = [('User-agent', 'Opera/9.23')] 
urllib2.install_opener(opener) 
req=urllib2.Request(url_login,urllib.urlencode(params)) 
response=urllib2.urlopen(req)