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  1. import re
  2.  
  3. uom_regex = 'box(?:es)?|bxs|bags?'
  4. regex = r'(?=({0}))\1([a-zA-Z]+)'.format(uom_regex)
  5.  
  6. test_strings = ["boxes", "bags", "boxesapple", "boxapple", "bagapple", 'bagsapple']
  7.  
  8. for test_string in test_strings:
  9.     result = re.sub(regex, r'\1 \2', test_string)
  10.     print(f"Original: {test_string}")
  11.     print(f"Modified: {result}\n")
Success #stdin #stdout 0.03s 9792KB
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stdin
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Standard input is empty
stdout
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Original: boxes
Modified: boxes

Original: bags
Modified: bags

Original: boxesapple
Modified: boxes apple

Original: boxapple
Modified: box apple

Original: bagapple
Modified: bag apple

Original: bagsapple
Modified: bags apple
https://ideone.com/X6xE2r
language:
Python 3 (python  3.12)
created:
2 years ago
visibility:
secret

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