Update app.py

app.py

@@ -168,7 +168,7 @@ def MixMelody(input_midi, input_find_best_match):
         MIDI_Summary = 'Selected Monster Mono Melodies MIDI: ' + str(new_song[0]) + '\n'
         MIDI_Summary += 'Selected melody instrument: ' + str(TMIDIX.Number2patch[new_song[1]]) + ' (' + str(new_song[1]) + ')' + '\n'
         MIDI_Summary += 'Melody notes count: ' + str(new_song[2]) + '\n'
-        MIDI_Summary += 'Matched melodies pool count: ' + len(matched_songs)
+        MIDI_Summary += 'Matched melodies pool count: ' + str(len(matched_songs))
 
         fn1 += '_' + str(new_song[0]) + '_' + str(TMIDIX.Number2patch[new_song[1]]) + '_' + str(new_song[1]) + '_' + str(new_song[2])