Procurar arquivos MP3 e gerar playlist
Esse foi meu primeiro script Python. A idéia é poder digitar toca white stripes na linha de comando do Linux ou MiniCli, e o XMMS abriria com uma playlist com todos arquivos mp3 que tivessem essas palavras-chave. Também é possível usar esse script no Windows, basta mudar as variáveis root_folder e player apropriadamente (algo como "c:\\my documents\\mp3" e "c:\\arquivos de programas\\winamp\\winamp.exe", respectivamente).
Boa sorte, e me contate caso tenha alguma dúvida. Também estou aberto a sugestões pra melhorar esse script. Ainda tem algumas coisas com cara de C e Java no código, mas aos poucos to me acostumando com o "estilo Python" 
Código
"""
Usage: toca <options> <keywords> ....
Example: toca beatles let it be
Searches all mp3 files with the _all_ specified keywords, generates
a playlist and execute it.
It accepts the same options as winamp or xmms, such as -e to enqueue,
and -s for shuffle. Actually the options are simply passed forward
to the player so all the xmms/winamp options are available.
If you didn't do it already, don't forget to change the variable
root_folder in this file (use any simple text editor).
"""
# ------------ configuration options ------------
root_folder = "/windows/E/mp3" # change this to your
# mp3 root folder...
print "WARNING: root_folder not customized." # and remove this line.
player = "xmms" # at windows might be something
# like c:\\program files\\winamp\\winamp.exe
playlist_filename = "playlist.m3u"
# ------------ module imports ------------
import sys
import os
# ------------ functions used ------------
def findFiles(directory, keylist):
"""
Gets a list of files in the directory (and subdirectories)
with contains all the keywords in 'keylist' at the filename
"""
filenames = []
for (path, dname, fnames) in os.walk(directory):
for filename in fnames:
# for each filename, check if it contains all the keywords
lowercase = filename.lower()
if lowercase.endswith(".mp3"):
for keyword in keylist:
if not keyword in lowercase:
break
else:
# all keywords were found: add to the result list
filenames.append(os.path.join(path, filename))
return filenames
def makePlaylist(fileList):
"""
Generates a playlist file for the filenames at fileList
"""
playlist = open(playlist_filename, "w") #create the file
playlist.write("#EXTM3U\n") #add the standard header
for file in fileList:
playlist.write(file + "\n") #add the items
playlist.close()
def playIt(opt):
"""
Execute the playlist.
"""
opt = " ".join(opt)
command = " ".join([player, opt, playlist_filename, "&"])
os.popen(command)
def main():
"""
Program main function.
"""
print "-" * 60
if len(sys.argv) == 1: # if no keyword was entered,
print __doc__ # give the user a nice tip...
else:
args = sys.argv[1:]
# get any options (starting with '-') the user might have
# entered these options will simply be passed forward to
# the player one common option is -e to enqueue the songs
# instead of creating a brand new playlist
opt = [x for x in args if x[0] == "-"]
# get the keywords to search for the mp3s
# if we don't use str.lower the user will never find
# anything if it puts a uppercase letter in any of the
# keywords.
keylist = [x.lower() for x in args if x not in opt]
print "Looking for mp3 files with the keyword(s): ",
keylist
files = findFiles(root_folder, keylist)
if files:
print "Finished! Found", len(files),
"file(s). So, let's play!"
makePlaylist(files)
playIt(opt)
else:
print "Didn't find anything :-( Did you mispell it?"
print "-" * 60
if __name__ == '__main__':
main()
Para usar
Renomeie o arquivo para toca, dê um chmod +x toca e copie para um diretório no seu PATH, por exemplo /usr/local/bin/. Então basta digitar $ toca <palavras-chave>. Pode usar quantas palavras quiser, para tornar a busca mais precisa (por exemplo, toca beatles let it be. Quaisquer opcões iniciadas com um "-" são passadas pro player, por exemplo "-e" para colocar as músicas na fila da playlist atual (enqueue) e "-s" para shuffle.
