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  1. import re
  2. text = r"\( Na Cl_{2} \) and \( Fe k_{3} cl  \)"
  3. print( re.sub(r'\\\(\s*([^()]*?)\s*\\\)', lambda x: f'\\( {"".join(c if c.isalnum() else "" for c in x.group(1))} \\)', text) )
Success #stdin #stdout 0.02s 9308KB
comments (?)
stdin 
Standard input is empty
stdout 
\( NaCl2 \) and \( Fek3cl \)
https://ideone.com/QKYOeH
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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