python - 从字符串中排除列表中出现的单词

Question

我有这样的列表:

stopwords = ['a', 'and', 'is']

还有这样的句子:

sentence = 'A Mule is Eating and drinking.'

预期输出:

reduced = ['mule', 'eating', 'drinking']

到目前为止我已经:

reduced = filter(None, re.match(r'\W+', sentence.lower()))

现在如何过滤掉停用词(注意大写到小写的转换以及标点符号的省略)？

Answer 1

过滤器表达式错误。将其更改为:

>>> reduced = filter(lambda w: w not in stopwords, re.split(r'\W+', sentence.lower()))

第一个参数是过滤条件。另请注意，要分割句子，您需要 re.split 而不是 re.match。

>>> list(reduced)
['mule', 'eating', 'drinking']