import RPi.GPIO as GPIO

pin = 17

GPIO.setmode(GPIO.BCM)

def callback(channel):
  print("Callback trigger (%d)" % channel)

GPIO.setup(pin, GPIO.IN, GPIO.PUD_DOWN)
GPIO.add_event_detect(pin, GPIO.RISING, callback=callback, bouncetime=300)

while(True):
  if (GPIO.input(pin) == 1):
    print("Direct trigger")