/usr/share/doc/python-wxgtk2.6-dbg/README.txt is in python-wxgtk2.6-dbg 2.6.3.2.2-5ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-wxgtk2.6-dbg/../python-wxgtk2.6/README.txt