favourite query...

gistfile1.py

@staticmethod
    def songs(where_clause):
        query = '''
    SELECT DISTINCT
        rdf:type(?song)
        tracker:id(?song) AS id
        nie:url(?song) AS url
        nie:title(?song) AS title
        nmm:artistName(nmm:performer(?song)) AS artist
        nie:title(nmm:musicAlbum(?song)) AS album
        nfo:duration(?song) AS duration
        "true"^^xsd:boolean AS favourite
        {
            %(where_clause)s
            FILTER (
        ...
        """