def refactor(self, items, write=False, doctests_only=False):
        """Refactor a list of files and directories."""

        for dir_or_file in items:
            if os.path.isdir(dir_or_file):
                self.refactor_dir(dir_or_file, write, doctests_only)
            else:
                self.refactor_file(dir_or_file, write, doctests_only)