No access to /dev/mem. Try running as root

I'm a newbie!

I have python files code to turn on the light: i tried here and here and here here on forum i chmod pi for /dev , adduser group file 1

print "================================"
    print "ROBOT: DANG MO QUAT"
    print "================================"
os.system("aplay -D hw:1,0 /home/pi/jasper/static/audio/dangmoquat.wav")
minh.main(['-p',pin,'on'])

file 2 access GPIO:

def GPIO_SETMODE(pin):
    if int(pin) in GPIOs:
#   GPIO.cleanup()
        GPIO.setmode(GPIO.BOARD) ## Use BOARD pin numbering
        GPIO.setup(int(pin), GPIO.OUT)
    return True
    else:
    return False 


def main(argv):
       type = ''   
       try:
          opts, args = getopt.getopt(argv,"b:p:h:s:r",['input=', 'params=', 'help'])
       except getopt.GetoptError:
          print 'Wrong command'
          sys.exit(2)
       print opts,args

       for opt, arg in opts:
          #...........doing something here....................#
       elif opt in ("-p", "--power"):
     input = arg
         if GPIO_SETMODE(input):#------------> errror occurs here#
                if args[0] == 'on':
                        Power(int(input), True)
                elif args[0] == 'off':
                        Power(int(input), False)
                else:
                        print 'Please choose on or off'

Error occurs here.

"No access to /dev/mem. Try running as root!" i have try here

and here and here here on forum

and google. I was awaked until dawn. I have chmod 777 pi dev -R What can i do know? Please help me.

Not only access to /dev can be privileged for access, also the device itself will probably be protected.

You should do an ls -l /dev and check the I/O device you are trying to access. Once you see the group, try adding yourself to that group: