Debian and Ubuntu have their own way of managing Python libraries and paths and I can't say I understand it. The modules are stored all over the place, with 'site-packages' being in one place, another called 'distro-packages' (if memory doesn't fail me) somewhere else, and user installed packages in yet another directory. It's hell.
It is absolute confusion, and when you think you've got it, they change it again. I suppose it makes sense to someone somewhere, who probably thinks they're being helpful by inventing all these complicated schemes.
