RPM Subpackages are very useful when you maintain the big project on the RHEL-kind Linux distro and you need to sparse the project into several differing packages (for instance - <main_package>, -libs, -devel, -debuginfo).

It would be convenient to do the same in a purely Pythonic projects (i mean to place something in setup.py and to obtain the output spec-file with a corresponding number of `%package <subpackage_name>` sections). I didn't manage to find the code that matches these purposes in the most up-to-date release of the distutils (/usr/lib64/python2.7/distutils/command/bdist_rpm.py). 

So I would ask to implement this feature. Also I can try to do it on my own in case if the community considers it as a good offer. Thank you.