def artists_by_letter(letter): if len(letter) == 1 and letter.isalpha(): artists = Artist.get_artists_by_letter(letter) left = [] right = [] for i, artist in enumerate(artists): if i % 2 == 0: left.append(artist) else: right.append(artist) return render_template('artists.html', title='Flask Lyrics - Artists', left=left, right=right, letter=letter) return redirect(url_for('home.home_'))