python project layout

[Huron]

Hi,

        What do you guys recommend in terms of python project layout, especially
unit tests layout ?
        Zope has unit tests per packages, twisted has a big tests directory full of
tests ... and the file naming convention are also pretty differents ...
        I guess there is part of "personnal choices" in those matters ... but there
is also good practice advices that can be gathered I think ...

- h