code: def ParseFileObject(self, parser_mediator, file_object):
      
      file_object.seek(0, os.SEEK_SET)
      header = file_object.read(2)
      if not self.BENCODE_RE.match(header):
        raise errors.UnableToParseFile('Not a valid Bencoded file.')
  
      file_object.seek(0, os.SEEK_SET)
      try:
        data_object = bencode.bdecode(file_object.read())
  
      except (IOError, bencode.BTFailure) as exception:
        raise errors.UnableToParseFile(
            '[{0:s}] unable to parse file: {1:s} with error: {2!s}'.format(
                self.NAME, parser_mediator.GetDisplayName(), exception))
  
      if not data_object:
        raise errors.UnableToParseFile(
            '[{0:s}] missing decoded data for file: {1:s}'.format(
                self.NAME, parser_mediator.GetDisplayName()))
  
      for plugin in self._plugins:
        try:
          plugin.UpdateChainAndProcess(parser_mediator, data=data_object)
        except errors.WrongBencodePlugin as exception:
          logger.debug('[{0:s}] wrong plugin: {1!s}'.format(
              self.NAME, exception))
docs: Parses a bencoded file-like object.
  
      Args:
        parser_mediator (ParserMediator): mediates interactions between parsers
            and other components, such as storage and dfvfs.
        file_object (dfvfs.FileIO): a file-like object.
  
      Raises:
        UnableToParseFile: when the file cannot be parsed.