python3.5 3.5.3-1+deb9u1 / usr / bin / pdb3.5

/usr/bin/pdb3.5 is in python3.5 3.5.3-1+deb9u1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/bin/../lib/python3.5/pdb.py