for s in self.vbox.children():

def keyPressEvent(self, e):		
		if e.key() == Qt.Key_Escape:
			self.close()
		elif e.key() == Qt.Key_Return:
			self._search_music()

self.vlcInstance = vlc.Instance("--no-xlib --verbose 2")
self.player = self.vlcInstance.media_player_new()
self.player.set_mrl(<линк на стрим>)
self.player.play()

class Play(QtCore.QThread):	
	sig = QtCore.pyqtSignal(int, int)

	def __init__(self, parent=None, *data):
		super(Play, self).__init__(parent)	

		self.parent = parent
		self.id = data[0]		

		self.parent.is_stop = False

		self.sig.connect(self.parent.updateProgress)
		self.playback = Streamer()
		self.start()

	def run(self):						
		uri = helpers.search.get_youtube_streams(self.id)
		self.playback.play(uri['audio'])

	def stop(self):
		self.playback.stop()
		self.exit()	
		return

import vlc
import requests
from PyQt5 import QtCore

class Streamer():

	def __init__(self, *data):
		self.vlcInstance = vlc.Instance("--no-xlib --verbose 2")
		self.player = self.vlcInstance.media_player_new()


	def stop(self):
		self.player.stop()
		return

	def pause(self):
		pass

	def get_position(self):
		return self.player.get_position()

	def play(self, uri):		
		r = requests.get(uri)
		if r.status_code == 200:			
			print('play')
			
			self.player.set_mrl(uri)
			self.player.play()
		else:
			return

self.scrolled = Gtk.ScrolledWindow()
        self.scrolled.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)

        for _ in vids:
            attrs = helpers.search.get_video_attrs(_)
            
            self.label_p = Gtk.Label(attrs['title'])
            self.listhbox = Gtk.HBox()
            self.vbox.pack_start(self.listhbox, False, False, 5)
            self.button_p = Gtk.Button()
            self.play_image = Gtk.Image.new_from_icon_name(
                "gtk-media-play",
                Gtk.IconSize.MENU
            )
            self.button_p.set_image(self.play_image)
            self.button_p.connect("clicked", self.on_click_me_clicked, attrs['id'])
            self.listhbox.pack_start(self.button_p, False, True, 2)
            self.listhbox.pack_start(Gtk.HSeparator(), False, False, 2)
            self.listhbox.pack_start(self.label_p, False, True, 2)

        self.scrolled.add(self.listhbox)

self.slider_update_signal_id = self.slider.connect(
            "value-changed", self.on_slider_changed)

def on_slider_changed(self, range):
        length = self.slider.get_value()
        self.player.set_position(length / 100.0)

Пробовал довольно примитивно:

GObject.timeout_add(200, self.timing) # вызов после начала проигрывания плеера

def timing(self):
        length = self.player.get_position()
        self.slider.set_value(length * 100.0)
        return True

thread = threading.Thread(target=self.timing)
thread.daemon = True
thread.start()

systemctl restart httpd.service

    gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fPIC -I/usr/include/python3.6m -c source/bases/Console.c -o build/temp.linux-x86_64-3.6/source/bases/Console.o
    creating build/lib.linux-x86_64-3.6/cx_Freeze/bases
    gcc -pthread build/temp.linux-x86_64-3.6/source/bases/Console.o -L/usr/lib/python3.6/config-3.6m-x86_64-linux-gnu -L/usr/lib -lpython3.6m -lpython3.6m -o build/lib.linux-x86_64-3.6/cx_Freeze/bases/Console -Xlinker -export-dynamic -lpthread -ldl -lutil -lm -s
    lto1: критична помилка: bytecode stream generated with LTO version 5.1 instead of the expected 5.2
    компіляцію перервано.
    lto-wrapper: критична помилка: gcc returned 1 exit status
    компіляцію перервано.
    /usr/bin/ld: error: lto-wrapper failed
    collect2: помилка: ld returned 1 exit status
    error: command 'gcc' failed with exit status 1
    
    ----------------------------------------
Command "/home/foozzi/pymine/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-_mlqjdtj/cx-Freeze/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-bubxuy4y-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/foozzi/pymine/include/site/python3.6/cx-Freeze" failed with error code 1 in /tmp/pip-build-_mlqjdtj/cx-Freeze/