We should be able to use upstream version of these parser, which is included in configargparse since version 1.5.5: bw2/ConfigArgParse@v1.5.3...1.5.5 .

The only thing is that the code got merged without the tests, so I'll need to migrate the tests over the configargparse repo first.

Edit: actually since configparser has not received the patch to use the standard library module tomllib, we can’t use it right away.