dput-ng is a from-scratch refresh of the old dput(1) command. This tool is
used (at some point) to aid with the act of uploading a package to an archive.
dput-ng aims to be compatible with the old dput(1) config files, while
adding additional features for better sanity checking, and designed in an
extensible way.
In addition, dput-ng also provides a Python package that's totally usable from 3ed party apps that wish to integrate with dput-ng.
Check the docs for more on topics that might interest you.