About the file structure

[ProgVal <progval@gmail.com>]

Hello,

I don't really understand the logic of the Python packages, modules,
and software.
Most of them are installed in /usr/lib/pythonX.Y/dist-packages/, as
the Debian Python Policy says.
Many of them are in /usr/pyshared/pythonX.Y/ (such as PyQt4)
Some others are in /usr/share/python-support/ (such as python-git).
And there are also packages in /usr/lib/pythonX.Y/site-packages/, such
as Gwibber, but I think it is a packaging mistake.

I there any logic in that?

Regards,
Valentin Lorentz