Comment 4 for bug 531662

AFAIK, we have 3 places to put the version number without duplication:

 - in setup.py (where it has to be passed to setup(). pkg_resources consumes
   this value indirectly through the PKG-INFO file generated during installation.

 - in an attribute of a module (which one, please? Defend your choice. ;)

 - In a data file in the package (something like the Zope2 product convention of
   'version.txt').

Note that without setuptools / distribute installed, we are already running in degraded mode (hard wiring filename globs for package data, no C optimizations, no documentation generation, wonky namespace package support, etc.). Do we really expect to deliver this feature in that case?

The 'pkg_resources' solution is uniform across *all* installed packages (even stdlib modules in 2.7). I would vote for sticking with it as the blessed solution to this need.