led.py

#!/usr/bin/python
fobj = open("/root/status.txt","r+")
import RPi.GPIO as GPIO
import time
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
status=fobj.read()
if status == "1":
    GPIO.output(7, GPIO.LOW)
    fobj.seek(0)
    fobj.truncate()
    fobj.write("0")
elif status == "0":
    GPIO.output(7, GPIO.HIGH)
    fobj.seek(0)
    fobj.truncate()
    fobj.write("1")
fobj.close()