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  1. import re
  2.  
  3. string = "\nsetting1: short string\nsetting2: much longer string\nwith a newline in it\nsetting3: short string\n"
  4. result = re.sub(r"(?m)^\w+:.*(?:\n\w+(?:[^\S\n].*)?)+$", lambda m: m.group().replace('\n', ' '), string)
  5. print(result)
Success #stdin #stdout 0.03s 9668KB
comments (?)
stdin 
Standard input is empty
stdout 
setting1: short string
setting2: much longer string with a newline in it
setting3: short string
https://ideone.com/n8Ctk3
language:
Python 3 (python  3.12)
created:
1 year ago
visibility:
secret

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