code: def run(self):
          
          root_path, folder_name = os.path.split(self.root_folder)
          self.root_folder = os.path.join(root_path, folder_name)
          for dirname, _, fnames in os.walk(self.root_folder):
              self.upload_files_in_folder(dirname, fnames)
docs: Starts the uploading thread.