/usr/lib/python2.7/dist-packages/sage_setup/ is in sagemath-common 7.4-9.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sage_setup/__init__.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/
/usr/lib/python2.7/dist-packages/sage_setup/autogen/__init__.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/interpreters.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/__init__.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/args.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/doc.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/generator.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/parser.py
/usr/lib/python2.7/dist-packages/sage_setup/autogen/pari/ret.py
/usr/lib/python2.7/dist-packages/sage_setup/clean.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/__init__.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/__main__.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/build_options.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/ext/
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/ext/__init__.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/ext/inventory_builder.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/ext/multidocs.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/ext/sage_autodoc.py
/usr/lib/python2.7/dist-packages/sage_setup/docbuild/sphinxbuild.py
/usr/lib/python2.7/dist-packages/sage_setup/find.py
/usr/lib/python2.7/dist-packages/sage_setup/optional_extension.py