def relative(self):
        """Return a relative part of the URL.

        scheme, user, password, host and port are removed.

        """
        if not self.is_absolute():
            raise ValueError("URL should be absolute")
        val = self._val._replace(scheme="", netloc="")
        return URL(val, encoded=True)
Return a relative part of the URL.

        scheme, user, password, host and port are removed.