mprisctl.py

#!/usr/bin/env python3
import dbus
import argparse
import sys


def get_session_bus():
    global session_bus
    try:
        session_bus
    except NameError:
        session_bus = dbus.SessionBus()
    return session_bus


def get_mpris2_buses():
    session_bus = get_session_bus()
    d = session_bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus')
    names = d.ListNames(dbus_interface='org.freedesktop.DBus')
    return [bus for bus in names if bus.startswith('org.mpris.MediaPlayer2.')]

def get_mpris2_objects():
    session_bus = get_session_bus()
    buses = get_mpris2_buses()
    return [session_bus.get_object(bus, '/org/mpris/MediaPlayer2') for bus in buses]

def main():
    parser = argparse.ArgumentParser(description='Control MPris2 compatible media players')
    parser.add_argument('command_or_player')
    parser.add_argument('command', nargs='?')
    args = parser.parse_args()

    if args.command is None:
        command = args.command_or_player
        try:
            player = get_mpris2_objects()[0]
        except IndexError:
            print('No Mpris2 compatible players are running.')
            sys.exit(1)
    else:
        command = args.command
        requested_player = args.command_or_player.lower().strip()
        try:
            player = [obj for obj in get_mpris2_objects() if obj.requested_bus_name.replace('org.mpris.MediaPlayer2.', '', 1).lower() == requested_player][0]
        except IndexError:
            print('Player {} is not running.'.format(requested_player))
            sys.exit(1)

    player = dbus.Interface(player, 'org.mpris.MediaPlayer2.Player')
    command = command.lower().strip()
    if command in ['pp', 'playpause', 'toggle']:
        player.PlayPause()
    elif command == 'pause':
        player.Pause()
    elif command == 'play':
        player.Play()
    elif command in ['next', 'skip']:
        player.Next()
    elif comand in ['back', 'previous', 'prev']:
        player.Previous()
    elif command not in ['status', 'stat', 'info']:
        parser.print_usage()
        sys.exit(1)        

if __name__ == '__main__':
    main()