以python django的名称上传的文件

I was using this code:

我使用的代码是:

  def saveUploadedInventory(self, inventory_file,user_id): 
      with open('uploaded_inventory_sheet.csv','wb+') as destination:
          for chunk in inventory_file.chunks():
              destination.write(chunk)

      reader = csv.reader(open('uploaded_inventory_sheet.csv','rb'))
  def saveU