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  1. import re
  2. pattern = "^.*?(?:STEP=([0-9]+))?$"
  3. group0 = re.search(pattern, "identifier STEP=10").groups()
  4. group1 = re.search(pattern, "identifier").groups()
  5. print(*group0)
  6. print(*group1)
Success #stdin #stdout 0.03s 9400KB
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10
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https://ideone.com/ejTBhf
language:
Python 3 (python  3.9.5)
created:
2 years ago
visibility:
secret

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