how to reboot a python script

1sys.stdout.flush()
2os.execl(sys.executable, 'python', __file__, *sys.argv[1:])

1import os
2
3while 1:
4    os.system("python main.py")
5    print "Restarting..."
6    exit()

1import os
2
3os.system("python main.py")
4exit()