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  1. import re
  2. s = "python is programming language p"
  3. print(re.sub(r'\bp(?=[^\W\d_])', '2', s, flags=re.I))
  4. print(re.sub(r'\bp\B', '2', s, flags=re.I))
Success #stdin #stdout 0.02s 27712KB
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Standard input is empty
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2ython is 2rogramming language p
2ython is 2rogramming language p
https://ideone.com/hHWO4A
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
secret

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