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  1. import re
  2.  
  3. examples = [
  4.     "D1",       # expected: ('1')
  5.     "D1sjdgf",  # ('1')
  6.     "D1.2",     # ('1', '2')
  7.     "D1.2.3",   # ('1', '2', '3')
  8.     "D3.10.3x", # ('3', '10', '3')
  9.     "D3.10.11"  # ('3', '10', '11')
  10. ]
  11.  
  12. rx = re.compile(r'^D(\d+)(?:\.(\d+)(?:\.(\d+))?)?')
  13.  
  14. for s in examples:
  15.     result = rx.search(s)
  16.     print(s, result.groups())
  17.  
Success #stdin #stdout 0.03s 9360KB
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stdin
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Standard input is empty
stdout
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D1 ('1', None, None)
D1sjdgf ('1', None, None)
D1.2 ('1', '2', None)
D1.2.3 ('1', '2', '3')
D3.10.3x ('3', '10', '3')
D3.10.11 ('3', '10', '11')
https://ideone.com/ck2PIP
language:
Python 3 (python  3.12)
created:
3 years ago
visibility:
secret

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