如何遍历和替换子字符串

Question

我正在尝试创建MadLibs游戏进行练习。我将每个故事保存在一个.txt文件中，第一个空白由_表示，第二个空白由__表示，第三个空白___依此类推。我正在尝试创建一个循环，该循环通过递增_和通过数组的计数来用用户输入的单词替换每个空格。我不确定这是否是最简单/正确的方法，但这就是我能想到的。这是我到目前为止的代码：

storyone = open("storyone.txt", "rt")
contentone = storyone.read()

words = ["blank", "blank", "blank", "blank", "blank", "blank", "blank", "blank", "blank", "blank", "blank", "blank"]

words[0] = input("Enter an Adjective: ")
words[1] = input("Enter a Noun: ")
words[2] = input("Enter a Verb (past-tense): ")
words[3] = input("Enter an Adverb: ")
words[4] = input("Enter an Adjective: ")
words[5] = input("Enter a Noun: ")
words[6] = input("Enter a Noun: ")
words[7] = input("Enter an Adjective: ")
words[8] = input("Enter a Verb: ")
words[9] = input("Enter a Adverb: ")
words[10] = input("Enter a Verb (past-tense): ")
words[11] = input("Enter an Adjective: ")

line = "_"
count = 0
for line in contentone:
    contentone.replace(line, words[count])
    count += 1
    line += "_"
    break

storyone.close()
print(contentone)

我希望代码通过并用输入的相应单词替换_字符串中的每个contentone。