Python提取包含单词的句子

Question

我正在尝试从文本中提取所有包含指定单词的句子。

 txt="I like to eat apple. Me too. Let's go buy some apples."
txt = "." + txt
re.findall(r"\."+".+"+"apple"+".+"+"\.", txt)

但它正在返回我：

 [".I like to eat apple. Me too. Let's go buy some apples."]

代替 ：

 [".I like to eat apple., "Let's go buy some apples."]

有什么帮助吗？

原文由 user2187202 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

In [3]: re.findall(r"([^.]*?apple[^.]*\.)",txt)
Out[4]: ['I like to eat apple.', " Let's go buy some apples."]

原文由 Kent 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

不需要正则表达式：

 >>> txt = "I like to eat apple. Me too. Let's go buy some apples."
>>> [sentence + '.' for sentence in txt.split('.') if 'apple' in sentence]
['I like to eat apple.', " Let's go buy some apples."]

原文由 jamylak 发布，翻译遵循 CC BY-SA 3.0 许可协议