class artist:
    artist = ""
    path = ""
    album = []

    def __init__(self):
        # Make a copy of the list album
        # Before instantiation, album is a class reference
        # so it is shared between all instances.
        # Other fields, as immutables give no problem, as the reference
        # is changed when the value is changed.
        self.album = list(album)

    def setArtist(self, artist):
        self.artist = artist
    def getArtist(self):
        return self.artist

    def setPath(self, path):
        self.path = path
    def getPath(self):
        return self.path

    def addAlbum(self, album):
        self.album.append(album)
    def getAlbum(self):
        return self.album