Programmatically enable DND mode on Ubuntu 20.04 LTS between 5PM - 8AM

do_not_disturb.py

import subprocess
import time

dnd_time = {'start': {'hour': 17, 'minute': 00}, 'end': {'hour': 8, 'minute': 00}} 
sleep_time = 30


def get_dnd_status():
    enabled = None
    status = subprocess.check_output(['gsettings', 'get', 'org.gnome.desktop.notifications', 'show-banners']).strip().decode()
    # 'false' means DND is enabled
    if status == 'false':
        enabled = True
    else:
        enabled = False
    return enabled


def set_dnd_status(to):
    set_it = subprocess.check_output(['gsettings', 'set', 'org.gnome.desktop.notifications', 'show-banners', f'{to}'])


if __name__ == '__main__':
    current_time = time.localtime()
    if dnd_time['start']['hour'] >= current_time.tm_hour >= dnd_time['end']['hour']:
        set_dnd_status('true')
    else:
        enabled = get_dnd_status()
        if enabled:
            set_dnd_status('false')
    time.sleep(sleep_time)

Minutes aren't actually paid attention to, but are easy enough to add.