Althoug semver states that m.m.p should be present. That does not mean it always is. Some software only gives a major or major.minor number. I would like semver to parse those numbers with minor or patch numbers defaulting to 0. That's what is ment by those major only numbers anyway.

version = semver.parse('3.0')
Should result in 3.0.0

version = semver.parse('10')
Should result in 10.0.0