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  1. import re
  2. teststr= 'chapter 1 Here is a block of text from chapter one.  chapter 2 Here is another block of text from the second chapter.  chapter 3 Here is the third and final block of text.'
  3. my_result = [x.strip() for x in re.split(r'(?!^)(?=chapter \d)', teststr)]
  4. print( my_result )
  5.  
Success #stdin #stdout 0.02s 9552KB
comments (?)
stdin 
Standard input is empty
stdout 
['chapter 1 Here is a block of text from chapter one.', 'chapter 2 Here is another block of text from the second chapter.', 'chapter 3 Here is the third and final block of text.']
https://ideone.com/sr6qis
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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