Hi @KitBurgess thanks for your report, much appreciated. 👍

Well, I fear, your example is not a valid semver version. According to the semver specification, version core (the major, minor, patch part) is separated by a "-" (dash) from the prerelease dev0). Your example contains a dot which is an invalid character. So the exception is correct.

If you change your example to "3.0.0-dev0" this would be a valid semver version and accepted.

Hope this helps.

Happy new year! 🎉 😁

Maybe I completely misunderstood your intention, but here is a second thought.
Do you mean the version from PyPI?

This is indeed an invalid semver version. However, I can't influence that as it is created automatically by setup.py sdist (run by tox -e prepare-dist).

If you want to convert such versions, you could do that with the packaging.version module like this:

>>> from packaging import version
>>> from semver import VersionInfo

>>> v = version.Version("3.0.0.dev2")
>>> VersionInfo(*v.release, prerelease="dev.%s" % v.dev)
VersionInfo(major=3, minor=0, patch=0, prerelease='dev.2', build=None

I think, it could be a helpful addition to our documentation. Would that help?

Hi @KitBurgess,

I've created a PR #352 based on our conversation, sorry for the delay. Would this help? If you like and have time, could you review the PR? That would be very helpful for me. Thanks! ❤️

As the PR is already merged and I didn't get any response, I assume it was okay. If there are still some questions, reopen it.

Thanks!