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  1. import re
  2. s = "1. First sentence. \n2. Second sentence. \n1. Another sentence. \n3. Third sentence."
  3. l = re.findall(r'(?:^|\n)(([0-9]+)\.[\s\S]*?)(?=\n[0-9]+\.|\Z)', s)
  4. curr_num = 0
  5. result = []
  6. for s,num in l:
  7. 	if curr_num > int(num):
  8. 		if not result:
  9. 			result = ['']
  10. 		result[-1] += s
  11. 	else:
  12. 		result.append(s) 
  13. 	curr_num = int(num)
  14.  
  15. print(result)
Success #stdin #stdout 0.02s 9712KB
comments (?)
stdin 
Standard input is empty
stdout 
['1. First sentence. ', '2. Second sentence. 1. Another sentence. ', '3. Third sentence.']
https://ideone.com/mXiXqH
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
secret

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