_button.py 文件源码

def wait_for_press(self):
        """Waits for the button to be pressed.

        This method blocks until the button is pressed.
        """
        GPIO.add_event_detect(self.channel, self.polarity)
        while True:
            if GPIO.event_detected(self.channel) and self._debounce():
                GPIO.remove_event_detect(self.channel)
                return
            time.sleep(0.02)