检测服务器图片是否存在

import requests 
l=[]

while True:
    logging.info('LOOP----')
    print('--------------')
    sql = 'SELECT id  FROM xmt_star_helper_file  ORDER BY id DESC'
    res = mysql_fetch(sql)
    for ac in res:
      img_url = 'http://192.168.23.12:8013/file/get?type=toutiao_helper&id=199'.replace('199', str(ac[0]))
      try:
         # print(img_url)
          logging.info(img_url)
          if len(requests.get(img_url).content)==0: 
                l.append(ac[0])
      except Exception as e:
            print(e)