In is special and assumed to be always installed even though it isn't part of...

In #python is #setuptools special and assumed to be always installed even though it isn't part of the standard library? (sort of a phantom stdlib)

e.g. is this setup.py file from #bson wrong, in that it import setuptools but isn't in the list of dependencies?
https://github.com/py-bson/bson/blob/master/setup.py

anyhow, install blew up on my build