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  1. import re
  2. p = re.compile(r'(?<=\d)(?=(?:\d{3})+$)')
  3. test_str = "2890191245"
  4. tmp = [x.start() for x in re.finditer(p, test_str)]
  5.  
  6. res = [test_str[0: tmp[0]]] + [(test_str[tmp[i]: tmp[i] + 3]) for i in range(len(tmp))]
  7.  
  8. print(res)
Success #stdin #stdout 0.03s 9984KB
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Standard input is empty
stdout
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['2', '890', '191', '245']
https://ideone.com/pdLfqO
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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