/usr/lib/flatpak/installed-tests/flatpak-builder/testpython.py is in flatpak-builder-tests 0.10.9-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 | #!/usr/bin/python2
import importme
print importme.foo
|