Spotify lookup in command line

spotify.py

#!/usr/bin/python

import urllib
import sys
import json
import re

SP_REGEX = re.compile('^http://[\S]+/track/([\S]+)')
SP_LOOKUP_BASEURL = 'http://ws.spotify.com/lookup/1/.json?uri=spotify:track:%s'


def get_track_details(url):
    fragment = SP_REGEX.match(url)
    if len(fragment.groups()) > 0:
        fragment = fragment.group(1)
    else:
        fragment = url
    res = json.loads(urllib.urlopen(SP_LOOKUP_BASEURL % fragment).read())
    track = res.get('track')
    if track:
        return track
    else:
        return {}

def pp_track(d):
    print 'Title  : ', d.get('name')
    artists = [x.get('name') for x in d.get('artists')]
    for a in artists:
        print 'Artist : ', a
    album = d.get('album')
    if album:
        print 'Album  : ', album.get('name')

if __name__ == '__main__':
    if len(sys.argv) > 1:
        track = get_track_details(sys.argv[1])
        pp_track(track)