def error_file(self):
        """The filename for self.error_log.

        If you set this to a string, it'll add the appropriate FileHandler for
        you. If you set it to ``None`` or ``''``, it will remove the handler.
        """
        h = self._get_builtin_handler(self.error_log, 'file')
        if h:
            return h.baseFilename
        return ''
The filename for self.error_log.

        If you set this to a string, it'll add the appropriate FileHandler for
        you. If you set it to ``None`` or ``''``, it will remove the handler.
        
cherrypy/_cplogging.py