/usr/lib/libpython3.4dm.so.1.0-gdb.py is in python3.4-dbg 3.4.3-1ubuntu1~14.04.7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/../bin/python3.4m-gdb.py
/usr/lib/../bin/python3.4m-gdb.py