Here is the order in which PyPy looks up Python modules:
mixed interpreter/app-level builtin modules, such as
the ``sys`` and ``__builtin__`` module.
on some classes being old-style.
We just maintain those changes in place,
-to see what is changed we have a branch called `vendo
+to see what is changed we have a branch called `vendo/stdlib`
wich contains the unmodified cpython stdlib
.. _`mixed module mechanism`: