Autostart and automatically restart Python Script Raspberry Pi

Question

I know how to autostart a python script (or so I thought). But I want a programm or something, if my python script is not running anymore, it should start the script again. Has anyone a idea how to do this? Edit: I tried running it as a service but that didnt work.

import bluetooth
import pygame
pygame.mixer.init()
server_sock=bluetooth.BluetoothSocket( bluetooth.RFCOMM )
port = 22
server_sock.bind(("",port))
server_sock.listen(1)
client_sock,address = server_sock.accept()
print ("Verbindung Hergestellt mit: ", address)
while True:
    recvdata = client_sock.recv(1024)
    print ("Nachricht bekommen: %s" % recvdata)
    pygame.mixer.pause()
    if (recvdata == b"h"):
        sound = pygame.mixer.Sound('/home/maxi/Desktop/test.wav')
        playing = sound.play()
    if (recvdata == b"p"):
        sound = pygame.mixer.Sound('/home/maxi/Desktop/test2.wav')
        playing = sound.play()
    if (recvdata == b"k"):
        break
client_sock.close()
server_sock.close()

My startscript is:

[Unit]
Description=MaxiTest
After=multi-user.target



[Service]
Type=simple
Restart=always
ExecStart=/usr/bin/python3 /home/maxi/Desktop/btsound1.py



[Install]
WantedBy=multi-user.target

Answer 1

I found what was the problem. I used rc.local and started the program 10 seconds after boot. The system needed time first to set up before I could start the script.