找出段落中出现的词 [英] find out the words appeared in a paragraph

问题描述

sentence = 'Alice was not a bit hurt, and she jumped up on to her feet in a moment.'
words = ['Alice','jumped','played']

我可以使用python中的filter函数从sentence中显示的words中查找所有元素:

I can use the filter function in python to find all the elements from words shown in sentence:

print filter(lambda x: x in words,sentence.split())

但是如果words中的元素有空格，.split()函数就会报错:

But if there is a space in the elements in words, .split() function causes mistake:

words = ['Alice','jumped up','played']

在这种情况下，sentence中找不到'jumped up'，这是错误的.

in this case, 'jumped up' cannot be found in sentence, which is incorrect.

有没有简单的方法可以解决这个问题(也许re包可以做到?)

Is there a simple method that can deal with the problem (perhaps re package can make it?)

推荐答案

您可以为此使用正则表达式:

You can use regex for this:

In [71]: import re

In [72]: words = ['Alice','jumped','played']

In [73]: [w for w in words if re.search(r'\b{}\b'.format(re.escape(w)), sentence)]
Out[73]: ['Alice', 'jumped']

In [74]: words = ['Alice','jumped up','played']

In [75]: [w for w in words if re.search(r'\b{}\b'.format(re.escape(w)), sentence)]
Out[75]: ['Alice', 'jumped up']

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