/usr/include/mpi4py is in python-mpi4py 1.3.1+hg20131106-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/../share/pyshared/mpi4py/include/mpi4py
/usr/include/../share/pyshared/mpi4py/include/mpi4py