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  1. import re
  2. text = "Hi. My name is _John_. I am _20_ years old."
  3. pattern = "_([^_]*)_"
  4. print re.sub(pattern, r'<b>\1</b>', text)
  5.  
Success #stdin #stdout 0.03s 6680KB
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Standard input is empty
stdout
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Hi. My name is <b>John</b>. I am <b>20</b> years old.
https://ideone.com/HWDcY
language:
Python (cpython 2.7.16)
created:
12 years ago
visibility:
public

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