我正在編寫俄勒岡州越野游戲，這是我所擁有的導致問題的代碼，我不知道為什么它會出現問題。我想要做的是，如果他們輸入的名稱包含列表中的單詞，則會將變量 easter_mode 設置為 1，如果不這樣做，則會將 easter_mode 設置為 0。需要出現在列表中的單詞是：（Sturtz，sturtz，Nate，nate）謝謝#asking nameplayer_name = input('What is your name:')while len(player_name) >= 0:  if len(player_name) > 1:    print("Weclome" + str(player_name))    print('Which mode do you want to play?')    mode_choice = input('(easy) More modes comming soon:')    break  if len(player_name) == 1:    player_name_choice = input(str(player_name)+"? Are you kidding me? Only one letter? You might regreat it (Y/N):")    if player_name_choice == "y" or player_name_choice == "Y":      print("Ok Your Choice!!...")      mode_choice = 'easter'      break    if player_name_choice == "n" or player_name_choice == "N":      player_name = input('What is your name:')  else:    print("You do not type anything, try again")    player_name = input('What is your name:')#Check Easter Egg Nameseaster_names = ["nate sturtz", "Nate Sturtz", "Nate", "nate", "Sturtz", "sturtz"]if player_name in easter_names:    easter_mode = 1else:    easter_mode = 0#easter eggs for nameif easter_mode == 1:  year_set = 2005  mode_choice = 'easter'else:  year_set = input('Enter a year whatever you like:')  if year_set.isdigit():    return_num = 0  else:    return_num = 1  while return_num == 1:    print('Error,please try again!')    year_set = input('Enter a year whatever you like:')    if year_set.isdigit():      return_num = 0    else:      return_num = 1  year_set = int(year_set)當我運行完整文件時，我得到Traceback (most recent call last):  File "Oregon.py", line 64, in <module>    player_name = input('What is your name:')  File "<string>", line 1, in <module>NameError: name 'nate' is not defined您可以在 Github 上查看完整代碼https://raw.githubusercontent.com/nsturtz/Oregon-Trail/master/Oregon.py