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  1. import re
  2.  
  3. text = "Hello_Dear_Today_is_Nice_Today_is_Nice"
  4.  
  5. def replace_nth(text, sub, rep_sub, n):
  6.     if n > 1:
  7.         sub = rf'^(.*(?:{sub}.*?){{{n - 1}}}){sub}'
  8.         rep_sub = r'\1' + rep_sub
  9.     return re.sub(sub, rep_sub, text, count=1)
  10.  
  11. print(replace_nth(text, "Today", "Today_2", 2))
Success #stdin #stdout 0.03s 9788KB
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Hello_Dear_Today_is_Nice_Today_2_is_Nice
https://ideone.com/XsqgGE
language:
Python 3 (python  3.12)
created:
1 year ago
visibility:
secret

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