如何使用正则表达式匹配段落 [英] How to match a paragraph using regex

问题描述

我一直在努力使用 python regex 尝试匹配文本中的段落，但我没有成功.我需要获取段落的开始和结束位置.

I have been struggling with python regex for a while trying to match paragraphs within a text, but I haven't been successful. I need to obtain the start and end positions of the paragraphs.

文本示例:

Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At
vero eos et accusam et justo duo dolores et ea rebum. 

Stet clita kasd gubergren,
no sea takimata sanctus est Lorem ipsum dolor sit amet.

Ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At
vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren,
no sea takimata sanctus est Lorem ipsum dolor sit amet.

在这个例子中，我想分别匹配以 Lorem、Stet 和 Ipsum 开头的所有段落(没有空行).有没有人知道如何做到这一点?

In this example case, I would want to separately match all the paragraphs starting with Lorem, Stet and Ipsum respectively (without the empty lines). Does anyone have any idea how to do this?

推荐答案

你可以像这样在双换行符上拆分:

You can split on double-newline like this:

paragraphs = re.split(r"\n\n", DATA)

要将段落捕获为匹配项，以便获得它们的起点和终点，请执行以下操作:

To capture the paragraphs as matches, so you can get their start and end points, do this:

for match in re.finditer(r'(?s)((?:[^\n][\n]?)+)', DATA):
   print match.start(), match.end()

# Prints:
# 0 214
# 215 298
# 299 589

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