/usr/lib/python2.7/dist-packages/rpy2/rinterface/ is in python-rpy2 2.8.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/rpy2/rinterface/__init__.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/_rinterface.x86_64-linux-gnu.so
/usr/lib/python2.7/dist-packages/rpy2/rinterface/_rpy_device.x86_64-linux-gnu.so
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/__init__.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_Device.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_EmbeddedR.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_Sexp.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpClosure.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpEnvironment.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpExtPtr.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpSymbol.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpVector.py
/usr/lib/python2.7/dist-packages/rpy2/rinterface/tests/test_SexpVectorNumeric.py