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  1. import re
  2. text = "[document 23] 23 and [document 34] 48 are white [document 24] 240 text"
  3. print( re.sub(r'\[document\s+(\d+)]\s+\1(?!\d)', r'\1', text) )
  4.  
Success #stdin #stdout 0.02s 9612KB
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Standard input is empty
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23 and [document 34] 48 are white [document 24] 240 text
https://ideone.com/MFus2E
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
secret

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