/usr/share/pyshared/google/protobuf/internal/ is in python-protobuf 2.4.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/google/protobuf/internal/__init__.py
/usr/share/pyshared/google/protobuf/internal/api_implementation.py
/usr/share/pyshared/google/protobuf/internal/containers.py
/usr/share/pyshared/google/protobuf/internal/cpp_message.py
/usr/share/pyshared/google/protobuf/internal/decoder.py
/usr/share/pyshared/google/protobuf/internal/encoder.py
/usr/share/pyshared/google/protobuf/internal/message_listener.py
/usr/share/pyshared/google/protobuf/internal/python_message.py
/usr/share/pyshared/google/protobuf/internal/type_checkers.py
/usr/share/pyshared/google/protobuf/internal/wire_format.py