On Tue, 23 Jun 2020 at 18:37, Adam Williamson <adamwill@fedoraproject.org> wrote:
IMBW, but I think I recall the Python packaging guidelines specifically
said that you could or should (I forget which) just BR python-devel and
not BR python-setuptools at some point. At this point there seems to be
no explicit mention, but the sample spec file looks a lot like a
project that uses setuptools, but does not explicitly BuildRequire
it...
From the Python packaging guidelines here: https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/
Packages building for Python 3 will need BuildRequires: python3-devel.
And also this:
Packages MAY use the automatic Python dependency generator. This generator uses upstream egg/dist metadata (such as setuptool’s install_requires)

Considering the file vs dir difference in metadata storage, I would say it's fair to expect dependencies to be strict.
I myself don't have any Python packages yet, but I'll try to pay extra attention to python3-setuptools in the future :).