get_url = 'https://www.zhihu.com/api/v4/questions/'+id+'/answers?include=data[*].is_normal,admin_closed_comment,reward_info,is_collapsed,annotation_action,annotation_detail,collapse_reason,is_sticky,collapsed_by,suggest_edit,comment_count,can_comment,content,editable_content,voteup_count,reshipment_settings,comment_permission,created_time,updated_time,review_info,relevant_info,question,excerpt,relationship.is_authorized,is_author,voting,is_thanked,is_nothelp;data[*].mark_infos[*].url;data[*].author.follower_count,badge[*].topics&limit=5&offset='+str(offset)+'&sort_by=default'
        header = {            'User-Agent': "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:34.0) Gecko/20100101 Firefox/34.0",            'Host': "www.zhihu.com",        }
        r = requests.get(get_url, verify=False, headers=header)        content = r.content.decode("utf-8")        txt = json.loads(content)

imgUrls = re.findall(r'data-original="([^"]+)"', str(txt))imgUrls = list(set(imgUrls))for imgUrl in imgUrls:            try:                splitPath = imgUrl.split('.')                fTail = splitPath.pop()                print(fTail)                if len(fTail) > 3 :                    fTail = 'jpg'                fileName = path +"/" + str(number) + "."+fTail                                img_data = urllib.request.urlopen(imgUrl).read()