iTunesLibrary.swift

if let library = try? ITLibrary(apiVersion: "1") {
            print(library.applicationVersion)
            for artist in library.allMediaItems
                .filter({ $0.mediaKind == ITLibMediaItemMediaKind.kindSong })
                .group(by: { $0.artist?.name }){
                print(artist.key)
                for album in artist.value.group(by: { $0.album.title }) {
                    print(" \(album.key) (\(album.value.first!.year))")
                }
            }
        }