current_version = 2.4.0.dev0

parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<release>[a-z]+)(?P<dev>\d+))?

serialize =

{major}.{minor}.{patch}.{release}{dev}

{major}.{minor}.{patch}

optional_value = dummy

values =

dev

dummy

serialize =

{major}.{minor}.{patch}

serialize =

{major}.{minor}.{patch}