Random playlist with crossfaded tracks

playlist.py

import random
from glob import glob
from pydub import AudioSegment

playlist_songs = [AudioSegment.from_mp3(mp3_file) for mp3_file in glob("*.mp3")]
random.shuffle(playlist_songs)

playlist = playlist_songs.pop(0)
for song in playlist_songs:
    playlist = playlist.append(song, crossfade=(15 * 1000))

playlist = playlist.fade_out(15)

playlist_length = len(playlist) / (1000*60)

out_f = open("%s_minute_playlist.mp3" % playlist_length, 'wb')

playlist.export(out_f, format='mp3')