How to override distutils install?

[Skip Montanaro]

    amk> Supply a cmd_class argument to setup(), like this:

    amk> setup(name = ...,
    amk>       cmdclass = {'build_py': qx_build_py},
    amk>      )

Much appreciated.   I'll see if there's something missing in the docs or if
I just missed what is already there.

S