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  1. import re
  2.  
  3. s = '''20 154
  4. 51 543
  5. 85 351
  6. '''
  7.  
  8. id_to_word = {
  9. '20': 'raz',
  10. '51': 'dva',
  11. '84': 'tri'}
  12.  
  13. pat = '|'.join(id_to_word.keys())
  14. s2 = re.sub(fr'^({pat})\b', lambda m: id_to_word[m[0]], s, flags=re.M)
  15.  
  16. print(s2)
Success #stdin #stdout 0.03s 9556KB
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Standard input is empty
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raz 154
dva 543
85 351
https://ideone.com/hXPKF2
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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