/usr/share/pyshared/pcs/ is in python-pcs 0.5+debian-1.2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/pcs/__init__.py
/usr/share/pyshared/pcs/packets/
/usr/share/pyshared/pcs/packets/__init__.py
/usr/share/pyshared/pcs/packets/arp.py
/usr/share/pyshared/pcs/packets/dhcpv4.py
/usr/share/pyshared/pcs/packets/dns.py
/usr/share/pyshared/pcs/packets/ethernet.py
/usr/share/pyshared/pcs/packets/icmpv4.py
/usr/share/pyshared/pcs/packets/icmpv6.py
/usr/share/pyshared/pcs/packets/ipsec.py
/usr/share/pyshared/pcs/packets/ipv4.py
/usr/share/pyshared/pcs/packets/ipv6.py
/usr/share/pyshared/pcs/packets/localhost.py
/usr/share/pyshared/pcs/packets/nd6.py
/usr/share/pyshared/pcs/packets/payload.py
/usr/share/pyshared/pcs/packets/pseudoipv6.py
/usr/share/pyshared/pcs/packets/tcp.py
/usr/share/pyshared/pcs/packets/tcpv6.py
/usr/share/pyshared/pcs/packets/udp.py
/usr/share/pyshared/pcs/packets/udpv4.py
/usr/share/pyshared/pcs/packets/udpv6.py