#!/usr/bin/env python

import sys, os, subprocess

launch = True

ps = subprocess.Popen("/bin/ps -x", shell=True, stdout=subprocess.PIPE)

for l in ps.stdout.read().split("\n") :
    if "Spotify" in l :
        launch = False

ps.stdout.close()

if launch :
    os.spawnvp(os.P_WAIT, '/Applications/iTunes.app/Contents/MacOS/iTunesX',sys.argv)
else :
    print "Not launching iTunes while spotify is running"