/usr/lib/python3/dist-packages/twisted/pair/ is in python3-twisted 16.6.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/twisted/pair/__init__.py
/usr/lib/python3/dist-packages/twisted/pair/ethernet.py
/usr/lib/python3/dist-packages/twisted/pair/ip.py
/usr/lib/python3/dist-packages/twisted/pair/raw.py
/usr/lib/python3/dist-packages/twisted/pair/rawudp.py
/usr/lib/python3/dist-packages/twisted/pair/test/
/usr/lib/python3/dist-packages/twisted/pair/test/__init__.py
/usr/lib/python3/dist-packages/twisted/pair/test/test_ethernet.py
/usr/lib/python3/dist-packages/twisted/pair/test/test_ip.py
/usr/lib/python3/dist-packages/twisted/pair/test/test_rawudp.py
/usr/lib/python3/dist-packages/twisted/pair/test/test_tuntap.py
/usr/lib/python3/dist-packages/twisted/pair/testing.py
/usr/lib/python3/dist-packages/twisted/pair/tuntap.py