start/stop mpv with python

botcommands.py

#!/usr/bin/env python

import socket
import subprocess
import os, sys

MPV_SOCKET = "/tmp/mpvsocket"
CIDER = "cider.hq.c3d2.de"
IS_PYTHON2 = sys.version_info < (3, 0)
if IS_PYTHON2:
    QUIT_CMD = '{"command": ["quit"]}\n'
else:
    QUIT_CMD = b'{"command": ["quit"]}\n'

def stop_playback():
    if os.path.exists(MPV_SOCKET):
        client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
        try:
            client.connect(MPV_SOCKET)
            client.send(QUIT_CMD)
            client.close()
        except socket.error as e:
            return "already stopped or error while sending quit: %s" % e
    else:
        return "no mpv running"

def playback(uri):
    stop_playback()
    subprocess.Popen(["mpv", "--ao", "pulse:"+CIDER, "--no-config", "--input-unix-socket="+MPV_SOCKET, "--", uri])

if __name__ == "__main__":
    playback("http://soundcloud.com/oliverschories/oliver-koletzki-b2b-oliver-schories-pleinvrees-utrecht-20-02-2015")
    import time
    time.sleep(10)
    stop_playback()