How to deal with multi tag file
Multi tag files
Some tag formats (such as ID3v2 and VorbisComment) support defining the same tag multiple times, mostly for when a song has multiple artists. MPD supports this, and sends each occurrence of a tag to the client.
When python-mpd encounters the same tag more than once on the same song, it uses a list instead of a string.
Function to get a string only song object.
def collapse_tags(song): for tag, value in song.iteritems(): if isinstance(value, list): song[tag] = ", ".join(set(value))