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  1. import re
  2. s = r'aaa (bbb (ccc)) ddd'
  3. print( re.sub(r'\(([^()]*)\)', r'{\1}', s) )
Success #stdin #stdout 0.03s 9556KB
comments (?)
stdin 
Standard input is empty
stdout 
aaa (bbb {ccc}) ddd
https://ideone.com/UFLCzD
language:
Python 3 (python  3.12)
created:
3 years ago
visibility:
secret

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