Raspberry Pi Guia Del Usuario página 200

input_value = GPIO.input(12)
if input_value == False:
print("The button has been pressed.")
while input_value == False:
input_value = GPIO.input(12)
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setup(12, GPIO.IN)
while True:
input_value = GPIO.input(12)
if input_value == False:
print("The button has been pressed.")
while input_value == False:
input_value = GPIO.input(12)
gpioinput.py
print
while input_value
input_value
sudo python gpioinput.py