new_contents: import shutil
  
  from driver import Driver
  
  
  class LocalFSDriver(Driver):
      """Driver for local file system"""
      def __init__(self):
          super(LocalFSDriver, self).__init__()
  
      def connect(self, include_guest=False):
          pass
  
      def acquire_access_token(self, guest=False):
          pass
  
      def upload(self, local_filename, remote_filename):
          shutil.copyfile(src=local_filename, dst=remote_filename)
  
      def download(self, remote_filename, local_filename):
          shutil.copyfile(src=remote_filename, dst=local_filename)
  
subject: add local filesystem driver