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  1. import re
  2.  
  3. s = '<p id="1">'
  4. print(re.sub(r'(<p)\s+(id="\d+">)', r'\1 class="test" \2', s))
Success #stdin #stdout 0.03s 9672KB
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Standard input is empty
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<p class="test" id="1">
https://ideone.com/gS3Y40
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
public

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