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  1. import re
  2. subject = 'I have a _cat, here is a pic {cat_pic}. Another_pic {cat_figure}'
  3. regex = re.compile(r'{[^}]*}|(_)')
  4. def myreplacement(m):
  5.     if m.group(1):
  6.         return ""
  7.     else:
  8.         return m.group(0)
  9. replaced = regex.sub(myreplacement, subject)
  10. print(replaced)
  11.  
Success #stdin #stdout 0.03s 9440KB
comments (?)
stdin 
Standard input is empty
stdout 
I have a cat, here is a pic {cat_pic}. Anotherpic {cat_figure}
https://ideone.com/HAgoWU
http://stackoverflow.com/q/23793022/
language:
Python 3 (python  3.9.5)
created:
10 years ago
visibility:
secret

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