__init__.py 文件源码

def __init__(self, pin):
        self.handle_pressed = None
        self.handle_released = None
        self.handle_changed = None
        self.has_callback = False
        if self.type == 'Button':
            GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
        else:
            GPIO.setup(pin, GPIO.IN)

        super(Input, self).__init__(pin)