Capture power button event

hid-power.py

import evdev
import subprocess
from evdev import InputDevice, categorize
# To find the path, use `evtest`
dev = InputDevice('/dev/input/event2')

def ignore_error(func):
    def myfunc(*args, **kwargs):
        try:
            func(*args, **kwargs)
        except Exception:
            print('Error ignored')
            traceback.print_exc(file=sys.stdout)
    return myfunc

def poweroff():
    cmd = ['/sbin/shutdown', '-h', 'now']
    subprocess.run(cmd)

@ignore_error
def run():
    for event in dev.read_loop():
        if event.type == evdev.ecodes.EV_KEY:
            data = evdev.categorize(event)
            if data.keystate == 1:
                print('Shutting down system')
                poweroff()
        else:
            print(f'Ignore event: {event}')

if __name__ == '__main__':
    while True:
        run()