venv/lib/python3.11/site-packages/setuptools/command/register.py

from distutils import log
import distutils.command.register as orig

from setuptools.errors import RemovedCommandError


class register(orig.register):
    """Formerly used to register packages on PyPI."""

    def run(self):
        msg = (
            "The register command has been removed, use twine to upload "
            + "instead (https://pypi.org/p/twine)"
        )

        self.announce("ERROR: " + msg, log.ERROR)

        raise RemovedCommandError(msg)