> It's not only the name, but a copy of the whole module dict just after
> import (that's why reload(sys) takes you back the
> sys.setdefaultencoding() function).

Ow.

> Actually I found a (hackish) way to clean the 'extension' dict, but this
> is not enough: the static variables in xxmodule.c cannot be cleared.
> Shall we exclude this test from the leak hunter?

I'd prefer not. If we hide this leak, we'll end up forgetting about its
existence.