led_callback.py

__author__ = 'Wojciech'
import time
import os
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

GPIO.setup(17, GPIO.OUT)
GPIO.setup(16, GPIO.IN, pull_up_down = GPIO.PUD_DOWN)

is_high = False

try:
    while True:
        if(GPIO.input(16) == True):
            print("Button pressed")
            os.system('date')
            print(GPIO.input(16))
            if(is_high):
                GPIO.output(17,GPIO.LOW)
                is_high=False
            else:
                GPIO.output(17,GPIO.HIGH)
                is_high=True
            time.sleep(1)

        else:
            os.system('clear')
            print("Waiting for you to press a button")
except KeyboardInterrupt:
    GPIO.cleanup()