code: def Readdir(self, path, fh=None):
      
      del fh
  
      # We can't read a path if it's a file.
      if not self._IsDir(path):
        raise fuse.FuseOSError(errno.ENOTDIR)
  
      fd = aff4.FACTORY.Open(self.root.Add(path), token=self.token)
  
      children = fd.ListChildren()
  
      # Make these special directories unicode to be consistent with the rest of
      # aff4.
      for directory in [u".", u".."]:
        yield directory
  
      # ListChildren returns a generator, so we do the same.
      for child in children:
        # Filter out any directories we've chosen to ignore.
        if child.Path() not in self.ignored_dirs:
          yield child.Basename()
docs: Reads a directory given by path.
  
      Args:
        path: The path to list children of.
        fh: A file handler. Not used.
  
      Yields:
        A generator of filenames.
  
      Raises:
        FuseOSError: If we try and list a file.