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  1. import re
  2.  
  3. def begin_end_hyphen_removal(line):
  4.     return re.sub(r"\s*(?<!\S)(?:-\w+(?:-\w+)*|\w+(?:-\w+)*-)(?!\S)", "", line)
  5.  
  6.  
  7. s = ("here are some word sub-words -word1 word2- sub-word2 word3- -word4\n"
  8.      "-word5 example\n"
  9.      "word6-\n"
  10.      "word7-\n"
  11.      "another one -word8\n"
  12.      "-word9")
  13. print(begin_end_hyphen_removal(s))
Success #stdin #stdout 0.02s 9336KB
comments (?)
stdin 
Standard input is empty
stdout 
here are some word sub-words sub-word2 example
another one
https://ideone.com/F0toaJ
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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