''' pg_midi_sound101.pyplay midi music files (also mp3 files) using pygametested with Python273/331 and pygame192 by vegaseat'''import pygame as pgdef play_music(music_file):  '''  stream music with mixer.music module in blocking manner  this will stream the sound from disk while playing  '''  clock = pg.time.Clock()  try:    pg.mixer.music.load(music_file)    print("Music file {} loaded!".format(music_file))  except pygame.error:    print("File {} not found! {}".format(music_file, pg.get_error()))    return  pg.mixer.music.play()  # check if playback has finished  while pg.mixer.music.get_busy():    clock.tick(30)# pick a midi or MP3 music file you have in the working folder# or give full pathnamemusic_file = "Latin.mid"#music_file = "Drumtrack.mp3"freq = 44100  # audio CD qualitybitsize = -16  # unsigned 16 bitchannels = 2  # 1 is mono, 2 is stereobuffer = 2048  # number of samples (experiment to get right sound)pg.mixer.init(freq, bitsize, channels, buffer)# optional volume 0 to 1.0pg.mixer.music.set_volume(0.8)try:  play_music(music_file)except KeyboardInterrupt:  # if user hits Ctrl/C then exit  # (works only in console mode)  pg.mixer.music.fadeout(1000)  pg.mixer.music.stop()  raise SystemExit