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  1. import re
  2. p = re.compile(r'(?<!^)(?<!n)((n)\2{2,})(?!$)(?!n)', re.IGNORECASE)
  3. s = "nnnABCnnnnDEFnnnnnGHInnnnnn"
  4. print(p.findall(s))
Success #stdin #stdout 0.02s 9016KB
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Standard input is empty
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[('nnnn', 'n'), ('nnnnn', 'n')]
https://ideone.com/x4mTUa
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
secret

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