這段代碼是為了從內部文件（文本文件）中選擇一個藝術家，讀取它并從內部文件中隨機選擇藝術家（在數組樣式的文本文件中，例如“胡蘿卜蘋果香蕉”），因此我添加了.txt 到所選藝術家，以便程序將打開帶有歌曲的藝術家文件并隨機選擇一首歌曲。import randomloop = Falsecounter = 0points = 0max_level = 10while loop == False:   for lines in open("pick.txt").readlines():          art = lines.split()          artist = random.choice(art)   for i in open((artist) + ".txt"):          song = i.split()          song_name = random.choice(song)          print("the song begins with  :" , song_name , "this song is by :" , artist)          answer = input("Enter full name of the song :  ")   if answer == song_name:          points = points +3          print("correct")          counter = counter +1          print(counter)   elif answer != song_name:          print("WRONG !!! \n try again")          dec = input("Please enter the full name of the song :")          if dec == song_name:                 points = points +2                 print("correct")                 counter = counter +1                 print(counter)          elif dec != song_name:                 print("smh \n WRONG")                 counter = counter +1                 print(counter)   elif counter >= max_level:          print("The End")          quit()   else:          print("error")input()之后，當我在 python shell 中運行代碼時，我有可能立即或稍后收到此錯誤：raise IndexError('Cannot choose from an empty sequence') from NoneIndexError: Cannot choose from an empty sequence