/usr/lib/python2.7/config_d/libpython2.7.a is in python2.7-dbg 2.7.3-0ubuntu3.9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/config_d/libpython2.7_d.a
/usr/lib/python2.7/config_d/libpython2.7_d.a