Python 使用空行作为指示符值，以结束while循环中的输入

我对Python还是新手。我的教授给了我们一个实验活动，它需要从用户的输入中打印出一个列表中的单词，而这个列表中的元素只在一次出现时才会显示。除了我不太确定教授用“空行”作为终止循环输入的指示值是什么意思外，其他一切都很好

word_Box = []                 

enter_Word = str(input("\nEnter a word. (Press 'Enter' key if finished.): \n")) #asking for user's input'

while enter_Word != "": #asks for input until user does not have input/pressing Enter key in keyboard
        word_Box.append(enter_Word) #stores every inputted word at the end of the list
        enter_Word = str(input("\nEnter a word (Press 'Enter' key if finished.): \n"))

word_Box = list(dict.fromkeys(word_Box)) #elements of the list is converted to keys of a dictionary to remove duplicates as dictionaries don't allow duplicates
                                                                         #dictionary is converted back to a list

print("\nThe word/s you entered is/are: ", word_Box)   #prints all the elements                                                       

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当到达循环内的这条线时

enter_Word = str(input("\nEnter a word (Press 'Enter' key if finished.): \n"))

如果按下enter键，则变量enter_Word=“”

因为这是循环的退出条件，所以循环将停止，程序将继续运行

word_Box = list(dict.fromkeys(word_Box))