Question

我正在处理一个问题，我需要查看段落中的项目并识别出未知的单词＆＃34;。我有两个清单。

第一篇（文章）： ["this","is","a","test","does","it","work"]

＆＃34;已知＆＃34;话： ["this","is","a","test"]

我是Python中的基本编码器，因此我尝试使用嵌套的for循环，浏览段落列表中的项目，并根据＆＃34;已知＆＃34中的单词检查它们;列表，但我遇到了一些问题。

for word in passage:
    for word1 in known:
        if word == word1:
            print word + " "
        else:
            print "* " + word + " * "

预期结果为>>>"this is a test * does * * it * * work *"

Answer 1

试试这个：

def identify(passage, known_words):
    result = [i if i in known_words else "* " + i + " *" for i in passage]
    return " ".join(result)

结果：

>>> identify(["this","is","a","test","does","it","work"], ["this","is","a","test"])
'this is a test * does * * it * * work *'

Answer 2

我想我应该把我的评论作为答案。 Python有一个很好的功能;即您已在两个in循环中使用的关键字for。 in还允许您在列表，元组或字典中搜索变量，短语等的存在。不使用使用显式for循环。所以而不是：

for word in passage:
    for word1 in known:
       ...

您可以简单地写一下：

for word in passage:
    # here, python will search the entire list (known) for word
    if word in known:
        print word + " "
    else:
        print "* " + word + " * "

Answer 3

passage = ['this','is','a','test','does','it','work']
known_words = ['this','is','a','test']
new_string = []
for word in passage:
    if word in known_words:
        new_string.append(word + " ")
    else:
        new_string.append("* " + word + " * ")

print ''.join(new_string)

输出：this is a test * does * * it * * work *

确定一个列表中的字符串是否存在于另一个字符串列表中

3 个答案: