Не запускается скрипт py при помощи .service?

Question

[Виталий Питаленко]

При старте сервиса он не вызывает плеер

[Unit]
Description=Polimech App
After=network.target
[Service]
ExecStart=/usr/bin/python3 -u appPolimech.py
WorkingDirectory=/home/pi/SplashPyPolimech/appPolimech
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi
[Install]
WantedBy=multi-user.target

import time as t
import vlc
import subprocess

link = [
    'rtsp://192.168.200.202:554/user=admin&password=&channel=1&stream=0?.sdp'
    ]

def play_link(param, link):
    media = vlc.Media(link)
    param = param + 1
    play_player(media)
    return param

def play_player(media):
    check_play()

def check_play():
    global col
    process = subprocess.Popen('exec python3 /home/pi/SplashPyPolimech/main.py', stdout=subprocess.PIPE, shell=True)
    while str(media_player.get_state()) != 'State.Playing':
        media_player.set_fullscreen(True)
        media = vlc.Media(link[col])
        media_player.set_media(media)
        media_player.play()
        t.sleep(3)
    col+=1
    process.kill()

media_player = vlc.MediaPlayer() #create player

global col

col = 0

check_play()

col = col + 1

while True:
    if col == 10:
        print('1')