/usr/share/doc/python3.7/examples/demo/ is in python3.7-examples 3.7.0~b3-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/doc/python3.7/examples/demo/README
/usr/share/doc/python3.7/examples/demo/beer.py
/usr/share/doc/python3.7/examples/demo/eiffel.py
/usr/share/doc/python3.7/examples/demo/hanoi.py
/usr/share/doc/python3.7/examples/demo/life.py
/usr/share/doc/python3.7/examples/demo/markov.py
/usr/share/doc/python3.7/examples/demo/mcast.py
/usr/share/doc/python3.7/examples/demo/queens.py
/usr/share/doc/python3.7/examples/demo/redemo.py
/usr/share/doc/python3.7/examples/demo/rpython.py
/usr/share/doc/python3.7/examples/demo/rpythond.py
/usr/share/doc/python3.7/examples/demo/sortvisu.py
/usr/share/doc/python3.7/examples/demo/ss1.py
/usr/share/doc/python3.7/examples/demo/vector.py