import pickle
with open('listfile.data', 'rb') as filehandle:
music_list = pickle.load(filehandle)
name_music = input("Введите название музыки: ")
put2music = input("Введите путь к музыке: ")
music_list.append(name_music)
music_list.append(put2music)
print(music_list)
with open('listfile.data', 'wb') as filehandle:
pickle.dump(music_list, filehandle)