def loginYahoo(username, password):  url0 = '''http://mail.yahoo.com.cn'''    response = opener.open(url0)data0 = response.read()done =re.search( r'(?<=(value=")).*?(?=")', re.search( r'(?<=(name=\.done)).*?(?=>)', data0 ).group()).group()challenge = re.search( r'(?<=(value=")).*?(?=")', re.search( r'(?<=(name="\.challenge")).*?(?=>)', data0 ).group()).group()url1 = '''http://edit.bjs.yahoo.com/config/login'''values = {'.intl' : 'cn','.done' : "%s%s" % (done, "%26.remember%3Dy%26.persistent%3D"),'.src' : 'ym','.cnrid' : 'ymhp_20000','.challenge' : '%s' % challenge,'login' : '%s@yahoo.cn' % username,'passwd' : '%s' % password,'.remember' : 'y','submit' : '%B5%C7%C2%BC'}data = urllib.urlencode(values)req = urllib2.Request(url1, data)req.add_header('Referer', 'http://mail.cn.yahoo.com/')response = opener.open(req)data2 =response.read()folder = re.search( r'(?=(showFolder)).*?(?=")', data2).group()  total = re.search( r'(?<=(tt=)).*', folder).group()num_per_page = re.search( r'(?<=(pSize=)).*?(?=&)', folder ).group()num_per_page = string.atoi(num_per_page)mod = string.atoi(total) % num_per_pagenum_times = string.atoi(total) / num_per_pageif mod > 0 :num_times += 1;index = 0for i in xrange(num_times):url2 = "http://cn.mc924.mail.yahoo.com/mc/%s&startMid=%d" % (folder, i * num_per_page )response = opener.open(url2)data3 = response.read()    for match in re.finditer(r'(?<=(showMessage)).*?(?=\>)', data3):index += 1part1 = "第%d封邮件" % indexpart2 = "%s" % match.group()part1 = part1.decode('utf8').encode('gbk')subject = re.search( r'(?<=(title=")).*?(?=")', part2 ).group()subject = part1.decode('gbk') + "    " + subject.decode('utf8')print( subject.encode('gbk'))