#!/usr/bin/env python
import time
import pifacedigitalio as pf

pf.init()
last_door_open = None

while True:
    door_open = pf.digital_read(0)
    if door_open != last_door_open:
        last_door_open = door_open
        print 'Door', 'opened' if door_open else 'closed'

    time.sleep(.1)