Regex Tester & Validator
Test, validate and match regular expressions
Test, validate and match regular expressions
Matches Python version strings following the PEP 440 specification, with an optional leading 'v' prefix. Uses named capture groups to extract the epoch, release numbers, pre-release labels (a/b/c/rc/alpha/beta/pre/preview), post-release suffixes (post/rev/r or -N), dev markers, and the +local version segment. Ideal for validating or parsing versions like 'v1!2.0.3rc1.post2.dev4+ubuntu.1' in package managers, dependency checkers, or CI pipelines.