How to use the pulsectl.Pulse function in pulsectl

return print(f'{func_label} (type={vt}): {val:.2f} -> {func(val):.2f}')

	if opts.conf: conf = conf_read(opts.conf)
	for k,v in vars(opts).items(): setattr(conf, k, v)
	del opts

	logging.basicConfig(
		level=logging.DEBUG if conf.debug else logging.WARNING,
		format='%(asctime)s :: %(threadName)s %(levelname)s :: %(message)s',
		datefmt='%Y-%m-%d %H:%M:%S' )
	log = get_logger('main')
	print = ft.partial(print, file=sys.stderr, flush=True) # stdout is used by curses
	log.debug('Initializing...')

	while True:
		with Pulse('pa-mixer-mk3', connect=False, threading_lock=True) as pulse:
			pulse.connect(wait=conf.reconnect)

			attic, streams = None, PAMixerStreams(pulse, conf, fatal=conf.fatal)
			if conf.show_stored_values and pulse.stream_restore_test() is not None:
				attic = PAMixerAttic(streams.update_wakeup, conf, fatal=conf.fatal)

			with streams.update_wakeup_poller(streams.update_wakeup_handler) as poller_thread:
				log.debug('Starting pulsectl event poller thread...')
				poller_thread.start()

				with PAMixerUI(streams, attic, conf) as curses_ui:
					# Any output will mess-up curses ui, so try to close sys.stderr if possible
					if not conf.verbose and not conf.debug and not conf.dump_stream_params:
						sys.stderr.flush()
						fd = os.open(os.devnull, os.O_WRONLY)
						os.dup2(fd, sys.stderr.fileno())

elif keyId == Key.KILL.value:
			focus.Kill();

		elif keyId == Key.LAUNCH_TERMINAL.value:
			psutil.Popen(["termite"],stdout=None,stderr=None);

		elif keyId == Key.LAUNCH_BROWSER.value:
			psutil.Popen(["firefox"],stdout=None,stderr=None);

		elif keyId == Key.LAUNCH_BROWSER_PRIVATE.value:
			psutil.Popen(["firefox","--private-window"],stdout=None,stderr=None);

		elif keyId == Key.AUDIO_VOLUME_MUTE.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.mute(sink,not sink.mute);

		elif keyId == Key.AUDIO_VOLUME_UP.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.volume_change_all_chans(sink,0.05);

		elif keyId == Key.AUDIO_VOLUME_DOWN.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.volume_change_all_chans(sink,-0.05);

		elif keyId == Key.MONITOR_BRIGHTNESS_UP.value:

def __init__(self, name):
    self.instance = self.__class__.instances.get(name) or Pulse(name)
    self.__class__.instances[name] = self.instance

def __init__(self, menu):
        self.menu = menu
        self.pulse_data = {}

        if shutil.which('pulseaudio') is None:
            self.pulse = None
            return

        check_pulseaudio = subprocess.run(['pulseaudio', '--check'],
            check=False,
            capture_output=True
        )
        if check_pulseaudio.returncode == 0:
            try:
                self.pulse = pulsectl.Pulse('neg-pulse-selector')
            except Exception:
                self.pulse = None

self.ioloop.add_callback(lambda: self.cmd_fetchFile(
                            inputFile, outputFile))
                    else:
                        msg = "Item not found in last locate results"
            else:
                msg = "Please specify which item of your locate command to fetch."
        elif command == "set volume":
            if number:
                try:
                    volume = int(re.search(r'\d+', number).group())
                except ValueError:
                    msg = "Invalid percentage: "+number
                except AttributeError:
                    msg = "Invalid percentage: "+number
                else:
                    with pulsectl.Pulse('setting-volume') as pulse:
                        for sink in pulse.sink_list():
                            pulse.volume_set_all_chans(sink, volume/100.0)
                    msg = "Volume set"
                    longMsg = "Volume set to "+str(volume)+"%"
            else:
                msg = "Please specify volume percentage"
        elif command == "stop":
            msg = "Not implemented yet"
        elif command == "take a picture":
            filename = os.path.join(os.environ["HOME"], "Dropbox",
                    datetime.datetime.now().strftime(
                        "LinuxControl-Picture-%Y-%m-%d-%Hh-%Mm-%Ss.png"))
            msg = "Taking picture, saving in Dropbox"
            longMsg = "Taking picture: " + filename
            self.ioloop.add_callback(lambda: self.cmd_image(filename))
        elif command == "screenshot":

elif keyId == Key.AUDIO_VOLUME_MUTE.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.mute(sink,not sink.mute);

		elif keyId == Key.AUDIO_VOLUME_UP.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.volume_change_all_chans(sink,0.05);

		elif keyId == Key.AUDIO_VOLUME_DOWN.value:
			if "pulsectl" in sys.modules:
				with pulsectl.Pulse('volume-increaser') as pulse:
					for sink in pulse.sink_list():
						pulse.volume_change_all_chans(sink,-0.05);

		elif keyId == Key.MONITOR_BRIGHTNESS_UP.value:
			psutil.Popen(["xbacklight","-inc","20"]);

		elif keyId == Key.MONITOR_BRIGHTNESS_DOWN.value:
			psutil.Popen(["xbacklight","-dec","20"]);

def pulse():
  global __pulse
  if __pulse is None:
    __pulse = Pulse("deity")
  return __pulse