/usr/include/python2.7_d/ImDib.h is in python-pil-dbg 3.1.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/python2.7_d/../python2.7/ImDib.h
/usr/include/python2.7_d/../python2.7/ImDib.h