raspberry pi gpio blink example

blink.py

#!/usr/bin/python
import RPi.GPIO as GPIO
import time

# blinking function
def blink(pin):
  GPIO.output(pin,GPIO.HIGH)
  time.sleep(1)
  GPIO.output(pin,GPIO.LOW)
  time.sleep(1)
  return

# to use Raspberry Pi board pin numbers
GPIO.setmode(GPIO.BCM)

# set up GPIO output channel
GPIO.setwarnings(False)
GPIO.setup(17,GPIO.OUT)

# blink GPIO17
while True:
  blink(17)
GPIO.cleanup()