/usr/lib/python2.7/dist-packages/pypy/sandbox/ is in python-pypy.sandbox 2.2.1+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/pypy/sandbox/__init__.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/_marshal.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/marshal.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/pypy_interact.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/__init__.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/tool/
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/tool/__init__.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/tool/ansi_mandelbrot.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/tool/ansi_print.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/tool/killsubprocess.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/__init__.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/sandbox/
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/sandbox/__init__.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/sandbox/sandlib.py
/usr/lib/python2.7/dist-packages/pypy/sandbox/rpython/translator/sandbox/vfs.py