[Distutils] Re: parver: parse and manipulate PEP 440 version numbers

On 21 Feb 2020, at 1:30, Ian Stapleton Cordasco wrote:

How is this different from PyPA's packaging library which has a parser for PEP 440 versions? https://github.com/pypa/packaging/blob/master/packaging/version.py

The Version class from packaging normalizes every input, and has no methods for modifying a version number: >>> from packaging.version import Version >>> Version('1.alpha') parver keeps the version number in the input form, for example if you like a dot before the pre-release tag and prefer 'alpha' to 'a': >>> from parver import Version >>> v = Version.parse('1.alpha') >>> v `parver.Version` is immutable, but has methods to derive new versions: >>> v.bump_pre() >>> v = v.replace(pre_tag='beta', pre=0) >>> v >>> v.normalize()