import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT)

try:
    print('1: ')

    time.sleep(2)
    GPIO.output(17, False)
    print(GPIO.input(17))

    print('2: ')

    time.sleep(2)
    GPIO.output(17, True)
    print(GPIO.input(17))

    print('3: ')

    time.sleep(2)
    GPIO.output(17, False)
    print(GPIO.input(17))

    print('4: ')

finally:
    GPIO.cleanup()

1:
0
2:
1
3:
0
4: