I have a pi zero that is in a cabinet and want to install buttons for power and reboot

I have the power connected using 5 6 and use this script

#!/usr/bin/python

import RPi.GPIO as GPIO

import time

import subprocess

GPIO.setmode(GPIO.BOARD)

GPIO.setup(5, GPIO.IN)

oldButtonState1 = True

while True:

#grab the current button state

buttonState1 = GPIO.input(5)

# check to see if button has been pushed

if buttonState1 != oldButtonState1 and buttonState1 == False:

# shutdown

subprocess.call("shutdown -h now", shell=True,

stdout=subprocess.PIPE, stderr=subprocess.PIPE)

oldButtonState1 = buttonState1

time.sleep(.5)

this works fine

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what I am having trouble with is a script for rebooting or adding code to the first script

I have tried 21 and gnd and changed shutdown -h now to reboot now

but nothing happens when button is pressed

any ideas what I am doing wrong please ?

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thanks in advance