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  1. import re
  2.  
  3. LIST1=["AR BR_16_0138244", "AR # BR_16_0138254","AR BR_16_0138264, HHGG AR BR_16_0138264", "AR R_16_01382649" ,"AADSFG AR # R_16_01382679 AR # R_16_01382679" ]
  4.  
  5. pattern = r"(\bB?R_\w+)(?!.*\1)"
  6. for s in LIST1:
  7.     m = re.search(pattern, s)
  8.     if m:
  9.         print(m.group(1))
  10.  
Success #stdin #stdout 0.03s 9556KB
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BR_16_0138244
BR_16_0138254
BR_16_0138264
R_16_01382649
R_16_01382679
https://ideone.com/4axs7G
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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