Python match a paragraph with multiple line-breaks using regex

Question

I try to Match Paragraphs using Python and Re.

An example of a text:

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.

two or more line breaks here

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

two or more line breaks here

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.

This Expression seems to almost do the job:

paragraphs = re.findall(r'(?s)((?:[^\n][\n]?)+)', textContent)

But I want to make sure to only match if there are two or more line-breaks. Currently it matches too often.

Edit:

ART. WEFWEFEW
  1 SDVSDRG: **<at the momemnt it breaks here, but it shouldnt>**
     a. wevvdfvdfd
     b. sdfsdfsdfsdfsdfsdghtrhrth

Edit2:

ART. WEFWEFEW
   1 SDVSDRG: 
      **here are two line-breaks, but dont split this paragraph**
      **at the momemnt it breaks here, but it shouldnt**
     a. wevvdfvdfd
     b. sdfsdfsdfsdfsdfsdghtrhrth

Currently it matches too often. - Which portions of the example text do you expect .findall() to return? — wwii
– wwii, Commented Sep 7, 2019 at 14:13

Andrei Odegov · Accepted Answer · 2019-09-08 12:29:49Z

Check out this regex (?m)(?:.+(?:\n.)?)+ on RegEx101, where you can also get an explanation of it.

Sample Python code that uses this regex:

import re
import pprint

textContent = '''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.



ART. WEFWEFEW
  1 SDVSDRG:
     a. wevvdfvdfd
     b. sdfsdfsdfsdfsdfsdghtrhrth'''

pprint.pprint(re.findall(r'(?m)(?:.+(?:\n.)?)+', textContent))

Output:

['Lorem ipsum dolor sit amet, consetetur sadipscing elitr,\n'
 'sed diam nonumy eirmod tempor invidunt ut labore et dolore\n'
 'magna aliquyam erat, sed diam voluptua. At vero eos et\n'
 'accusam et justo duo dolores et ea rebum.',
 'Stet clita kasd gubergren, no sea takimata sanctus est Lorem\n'
 'ipsum dolor sit amet.',
 'Ipsum dolor sit amet, consetetur sadipscing elitr, sed diam\n'
 'nonumy eirmod tempor invidunt ut labore et dolore magna\n'
 'aliquyam erat, sed diam voluptua. At vero eos et accusam et\n'
 'justo duo dolores et ea rebum. Stet clita kasd gubergren, no\n'
 'sea takimata sanctus est Lorem ipsum dolor sit amet.',
 'ART. WEFWEFEW\n'
 '  1 SDVSDRG:\n'
 '     a. wevvdfvdfd\n'
 '     b. sdfsdfsdfsdfsdfsdghtrhrth']

Demo on Rextester.

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