hausbrand/bar.py

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM) # GPIO Numbers instead of board numbers
GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_UP)

while True:
    #print (GPIO.input(23))
    time.sleep(0.1)
    if (GPIO.input(23) == 0)
        print ("ringing")