    def blur(self):
        """
        Blur this Frame.
        """
        # If the frame has no focus, it's a NOOP.
        if not self._has_focus:
            return
        self._layouts[self._focus].blur()
        self._has_focus = False
        logger.debug("Blurred frame: %s", self)
Blur this Frame.
asciimatics/widgets/frame.py