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  1. import re
  2.  
  3. l = ['ad2g3f234', '4jafg32', 'fg23g523']
  4.  
  5. result = [
  6.     re.sub(
  7.         r"(23)|(?:(?!23)\d)+", 
  8.         lambda m: m.group(1) if m.group(1) else "", s) for s in l
  9. ]
  10. print(result)
Success #stdin #stdout 0.03s 9428KB
comments (?)
stdin 
Standard input is empty
stdout 
['adgf23', 'jafg', 'fg23g23']
https://ideone.com/U0JONS
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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