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  1. import re
  2. strings = ["0.0.4.1", "7.51.4.1", "0.1.4.1", "001", "0.1", ".0.1", "0.0.0.0", "0.1.2.3.4.5"]
  3. pattern = r"^(?=\d+(?:\.\d+){3}$)0+\.(?:0+\.)*"
  4. for s in strings:
  5.     print(re.sub(pattern, "", s))
Success #stdin #stdout 0.03s 9504KB
comments (?)
stdin 
Standard input is empty
stdout 
4.1
7.51.4.1
1.4.1
001
0.1
.0.1
0
0.1.2.3.4.5
https://ideone.com/08WcUC
language:
Python 3 (python  3.9.5)
created:
2 years ago
visibility:
secret

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