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  1. import re
  2.  
  3. regex = r"(?:[BR]?|(?<!L)C)REF|^(?!\|)"
  4. test_str = "XYZ:MUMBAI UNIVERSITYCREF:PUNE UNIVERSITYBREF:DADAR UNIVERSITYRREF:KOLHAPUR UNIVERCITY LLCREF:SOLAPUR UNIVERSITY"
  5. subst = "|\\g<0>"
  6. result = re.sub(regex, subst, test_str)
  7.  
  8.  
  9. print (result)
  10.  
  11.  
Success #stdin #stdout 0.02s 9620KB
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stdin
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Standard input is empty
stdout
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|XYZ:MUMBAI UNIVERSITY|CREF:PUNE UNIVERSITY|BREF:DADAR UNIVERSITY|RREF:KOLHAPUR UNIVERCITY LLC|REF:SOLAPUR UNIVERSITY
https://ideone.com/Mt8oaX
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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