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  1. import re
  2.  
  3. s = 'HAPPY'
  4. print(re.findall(r'(?=(..))', s))
Success #stdin #stdout 0.01s 23304KB
comments (?)
stdin 
Standard input is empty
stdout 
['HA', 'AP', 'PP', 'PY']
https://ideone.com/xDAXw7
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
secret

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