Check door opening with Raspberry

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Run this code with python2.7
#
#if you need to configure postfix, please use https://easyengine.io/tutorials/linux/ubuntu-postfix-gmail-smtp/

import os
import sys
import RPi.GPIO as GPIO

button = 17 #GPIO pin where we put the button, dry reed switch, or anything another sensor for door opening
active = 1 #if set to 0 the daemon will stop
email = "user@gmail.com" #your email address

def my_callback(pin):
    input_value = GPIO.input(pin)
    print "The GPIO pin input "+str(pin)+" changed value: "+str(input_value)
    os.system('echo "Door opened" | mail -s "alarm" '+email)


os.system('modprobe w1-gpio')

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

GPIO.setup(button, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.add_event_detect(button, GPIO.BOTH)
GPIO.add_event_callback(button, my_callback)

while active:
    time.sleep(10)
print "Exiting"
sys.exit()