FOSS projects exhibiting clean/good OOP?

[Michele Simionato]

On Jul 9, 4:38 pm, Phillip B Oldham <phillip.old... at gmail.com> wrote:
> I'm wondering whether anyone can offer suggestions on FOSS projects/
> apps which exhibit solid OO principles, clean code, good inline
> documentation, and sound design principles?
>
> I'm devoting some time to reviewing other people's code to advance my
> skills. Its good to review bad code (of which I have more than enough
> examples) as well as good, but I'm lacking in finding good examples.
>
> Projects of varying sizes would be great.

I vote for the doctest module in the standard library.