python 文件解压缩到指定路径中文名乱码的问题

import zipfile
import os
from pathlib import Path
def ZipFiles(req):
    fileser=req.FILES['file']
    z=zipfile.ZipFile(fileser, 'r')
    # logger = logging.getLogger("upmsg")
    user = UserAccountTB.objects.filter(id=req.user_id).first()
    with z as f:
        for fn in f.namelist():
          try:
              an = unicode(fn, 'cp936')
              Path(f.extract(member=fn, path='./static/certif_file/')) #解压到指定路径的文件不能正常访问
              if fn.endswith('jpg'):
                  dirfile='./static/certif_file/'+str(fn) #修改前路径名称包括文件
                  abs = './static/certif_file/' + str(an) #修改后的名称
                  os.renames(dirfile, abs) #更改名称
   return JsonResponse({"ret":0,'msg':'success'})