def range(self):
        """A tuple containing the numeric range for this Slot.

        The Python equivalent of the CLIPS slot-range function.

        """
        data = clips.data.DataObject(self._env)

        lib.EnvSlotRange(self._env, self._cls, self._name, data.byref)

        return tuple(data.value) if isinstance(data.value, list) else ()
A tuple containing the numeric range for this Slot.

        The Python equivalent of the CLIPS slot-range function.