How to use the gpiozero.boards.ButtonBoard function in gpiozero

def _fire_changed(self):
        if self.when_changed:
            self.when_changed()

    def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)
        pin_factory = kwargs.pop('pin_factory', None)
        order = kwargs.pop('_order', None)

def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

if self.when_changed:
            self.when_changed()

    def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)
        pin_factory = kwargs.pop('pin_factory', None)
        order = kwargs.pop('_order', None)
        LEDClass = PWMLED if pwm else LED

self._when_changed = self._wrap_callback(value)

    def _fire_changed(self):
        if self.when_changed:
            self.when_changed()

    def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)

def _fire_changed(self):
        if self.when_changed:
            self.when_changed()

    def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)
        pin_factory = kwargs.pop('pin_factory', None)

def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)
        pin_factory = kwargs.pop('pin_factory', None)
        order = kwargs.pop('_order', None)
        LEDClass = PWMLED if pwm else LED
        super(LEDCollection, self).__init__(
            *(

self.when_changed()

    def _fire_events(self, ticks, new_value):
        super(ButtonBoard, self)._fire_events(ticks, new_value)
        old_value, self._last_value = self._last_value, new_value
        if old_value is None:
            # Initial "indeterminate" value; don't do anything
            pass
        elif old_value != new_value:
            self._fire_changed()

ButtonBoard.is_pressed = ButtonBoard.is_active
ButtonBoard.pressed_time = ButtonBoard.active_time
ButtonBoard.when_pressed = ButtonBoard.when_activated
ButtonBoard.when_released = ButtonBoard.when_deactivated
ButtonBoard.wait_for_press = ButtonBoard.wait_for_active
ButtonBoard.wait_for_release = ButtonBoard.wait_for_inactive


class LEDCollection(CompositeOutputDevice):
    """
    Extends :class:`CompositeOutputDevice`. Abstract base class for
    :class:`LEDBoard` and :class:`LEDBarGraph`.
    """
    def __init__(self, *args, **kwargs):
        pwm = kwargs.pop('pwm', False)
        active_high = kwargs.pop('active_high', True)
        initial_value = kwargs.pop('initial_value', False)
        pin_factory = kwargs.pop('pin_factory', None)
        order = kwargs.pop('_order', None)
        LEDClass = PWMLED if pwm else LED
        super(LEDCollection, self).__init__(