Format the song according to certain patterns:

        %a: artist title
        %s: song title
        %A: album title

def format(self, pattern):
        """
        Format the song according to certain patterns:

        %a: artist title
        %s: song title
        %A: album title
        """
        pattern = pattern.replace('%a', self.artist.name)
        pattern = pattern.replace('%s', self.name)
        pattern = pattern.replace('%A', self.album.name)
        return pattern.replace('/', '') \
                      .replace('\\', '') \
                      .replace(":", "") \
                      .replace("*", "") \
                      .replace("?", "") \
                      .replace('"', "") \
                      .replace("|", "") \
                      .replace("<", "") \
                      .replace(">", "")