/usr/lib/pyshared/python2.7/mod_python/_psp.so is in libapache2-mod-python 3.3.1-11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/pyshared/python2.7/mod_python/../../../python2.7/dist-packages/mod_python/_psp.so