script to run display_all when switch press is registered at GPIO pin

turn_on.py

#!/usr/bin/env python3
# based on a script by Alex Eames https://raspi.tv/
# https://raspi.tv/2013/how-to-use-interrupts-with-python-on-the-raspberry-pi-and-rpi-gpio
import os
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)

# GPIO 19 set up as input, pull-down to register more than one switch use.
GPIO.setup(19, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

# trigger each action in turn
actions = ["temps", "events"]
i = 0

try:
    while True:
        GPIO.wait_for_edge(19, GPIO.RISING)
        os.system("./display_off on")
        # replace this path on every deploy
        os.system("/nix/store/ia5b02zam4h8qwsjc2r11hqpl95qk32m-raspi-oled-armv6l-unknown-linux-musleabihf-unstable-infdev-2/bin/display_all sensors.db events.json " + actions[i % len(actions)])
        i += 1
except KeyboardInterrupt:
    GPIO.cleanup()       # clean up GPIO on CTRL+C exit
GPIO.cleanup()           # clean up GPIO on normal exit