Simple GUI-based script to synchronize a music folder with a music device. Haven't tested this in a while, so I'm not sure if this still works.

sync_music_device.py

#!/usr/bin/env python
"""
Synchronize music with a portable device
"""

import os
import subprocess
from easygui import msgbox, choicebox, codebox, ynbox, diropenbox

def sync_music():
    """Synchronize music with a portable device"""
    device_filter = ['YP', 'usb', 'music']

    command = ['rsync', '-v', '-r']

    #get devices
    df_output = subprocess.Popen(['/bin/df', '-h', '-l'],
                        stdout=subprocess.PIPE).communicate()[0]
    lines = df_output.split('\n')[1:-1]
    lines = [x.split() for x in lines]
    devices = []
    for line in lines:
        for device in device_filter:
            if device in line[5]:
                devices.append(line)
                break
    choices = [x[5]+" "+x[1] for x in devices]
    choice = choicebox("Which device do you want to sync with?",
                       "Choose your device",
                       choices)
    device_name = choice.split()[0]
    msgbox("using "+choice)

    delete = ynbox("delete files on device if not in local directory?",
                   "Delete files?")
    if delete:
        command += ['--delete']

    # Get source dir
    src_dir = diropenbox(msg="Choose source dir",
                         title="Choose src dir",
                         default="~")
    print src_dir
    src_dir += os.path.sep
    print src_dir

    # Run rsync
    command += [src_dir, device_name+'/Music']
    print 'running ' + ' '.join(command)
    output = subprocess.Popen(command,
                        stdout=subprocess.PIPE, shell=True).communicate()[0]
    codebox('Here is the log output', 'Summary', output)

def main():
    """Main script"""
    sync_music()

if __name__ == "__main__":
    main()