@name.setter
    def name(self, value):
        old_name = self._name
        if value is old_name:
            return
        self._name = value
        configs = ConfigParser._named_configs

        if old_name:  # disconnect this parser from previously connected props
            _, props = configs.get(old_name, (None, []))
            for widget, prop in props:
                widget = widget()
                if widget:
                    widget.property(prop).set_config(None)
            configs[old_name] = (None, props)

        if not value:
            return

        # if given new name, connect it with property that used this name
        try:
            config, props = configs[value]
        except KeyError:
            configs[value] = (ref(self), [])
            return

        if config is None:
            raise ValueError('A parser named {} already exists'.format(value))
        for widget, prop in props:
            widget = widget()
            if widget:
                widget.property(prop).set_config(self)
        configs[value] = (ref(self), props)
dataset/ETHPy150Open kivy/kivy/kivy/config.py/ConfigParser.name/operator `is not` -> `is`