Get all your housholds:
sonos = MySonos.from_config('config.json')
sonos.discover()
Get your groups and players. (As of now sonos does not provide names for housholds, usually you only have so index 0 should be fine)
household = sonos.households[0].get_groups_and_players()
Find your group
livingroom = household.find_group_by_name("Living room")
Play somthing
livingroom.play()