Not all Python authors expressed?

[proycon]

In https://tools.dev.clariah.nl/pagexml-tools we see only one author whereas the pyproject.toml has multiple. Maybe caused by PEP517 only supporting one? Investigate..

[proycon]

It seems importlib.metadata (standard library) only exposes a single author, even though technically multiple authors do appear in the PKG-INFO (comma separated). The second simply gets stripped it seems. This problem was also illustrated in proycon/codemetapy#28.

The core metadata specification makes no mention of supporting multiple authors. The field is not marked as being "multiple use" either.

However, pyproject.toml does support multiple authors so it seems we are, again referring to proycon/codemeta#28, not getting the full metadata as it goes beyond core metadata. We may need to parse pyproject.toml ourselves to get it (which I didn't really want to do).

[proycon]

This library may also be worth a try to get the information from the PKG-INFO: https://pypi.org/project/pkginfo/

[proycon]

On further investigation, I was wrong and do get multiple authors when invoking importlib.metadata (stdlib) or the importlib_metadata 3rd party package. Just like the PKG-INFO says. Only when mediated via the pep517 package is this information missing.

[proycon]

However, PKG-INFO and egg-info may be an older method (distutils, setuptools). On a project with a pyproject.toml with poetry, I don't seem to get one and I rely on pep517 :/