def traverse(self,directory):
        """
        Processes a filelist from findMP3s, building the musicLibrary from metadata.
        """
        u = Utils()
        results = {}

        files = []

        for root, subFolders, file in os.walk(directory):
            for f in file:
                if f.endswith(".mp3"):
                    files.append(os.path.join(root,f))


        for f in files:
            filePath = os.path.join(directory, f)
            try:
                audio = EasyID3(filePath)
                artist = unicode(audio["artist"][0])
                title = unicode(audio["title"][0])
                album = unicode(audio["album"][0])

                if not results.has_key(artist):
                    results[artist] = {}
                if not results[artist].has_key(album):
                    results[artist][album] = []
                results[artist][album].append([filePath,title])

            except KeyError:
                print "MP3 missing artist, title or album: " + filePath
            except EOFError:
                print "ID3 table corrupted: " + filePath
            except IOError:
                print "IOError (UTF getting in the way): " + filePath


        return results