How to organize control access to source code ?

[Paul Rubin]

Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> writes:
> > How can we organize development team with code source control policy,
> > that limit access to some portion of code ?
> 
> The question may be of interest, but I'm afraid I don't understand how
> it relates to Python ???

It sounds like a reasonable application of multiple Mercurial
repositories.  Mercurial is a distributed source control system
written in Python.  Does that count?