/usr/lib/python2.7/dist-packages/visa.py is in pyvisa 1.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/../../../share/pyshared/visa.py
/usr/lib/python2.7/dist-packages/../../../share/pyshared/visa.py