我需要从此链接的FLVPath中获取值:http://www.testpage.com/v2/videoConfigXmlCode.php?pg=video_29746_no_0_extsitefromlxmlimporthtmlsub_r=requests.get("http://www.testpage.co/v2/videoConfigXmlCode.php?pg=video_%s_no_0_extsite"%list[6])sub_root=lxml.html.fromstring(sub_r.content)forsub_datainsub_root.xpath('//PLA