headers = { 
            "Accept":"text/html,application/xhtml+xml,application/xml;", 
            "Accept-Encoding":"gzip", 
            "Accept-Language":"zh-CN,zh;q=0.8", 
            "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36" 
            }