/usr/lib/python2.6/ is in pyvisa 1.4-1.
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/usr/lib/python2.6/dist-packages/
/usr/lib/python2.6/dist-packages/PyVISA-1.4.egg-info/
/usr/lib/python2.6/dist-packages/PyVISA-1.4.egg-info/PKG-INFO
/usr/lib/python2.6/dist-packages/PyVISA-1.4.egg-info/SOURCES.txt
/usr/lib/python2.6/dist-packages/PyVISA-1.4.egg-info/dependency_links.txt
/usr/lib/python2.6/dist-packages/PyVISA-1.4.egg-info/top_level.txt
/usr/lib/python2.6/dist-packages/pyvisa/
/usr/lib/python2.6/dist-packages/pyvisa/__init__.py
/usr/lib/python2.6/dist-packages/pyvisa/visa.py
/usr/lib/python2.6/dist-packages/pyvisa/visa_attributes.py
/usr/lib/python2.6/dist-packages/pyvisa/visa_exceptions.py
/usr/lib/python2.6/dist-packages/pyvisa/visa_messages.py
/usr/lib/python2.6/dist-packages/pyvisa/visa_study.py
/usr/lib/python2.6/dist-packages/pyvisa/vpp43.py
/usr/lib/python2.6/dist-packages/pyvisa/vpp43_attributes.py
/usr/lib/python2.6/dist-packages/pyvisa/vpp43_constants.py
/usr/lib/python2.6/dist-packages/pyvisa/vpp43_types.py
/usr/lib/python2.6/dist-packages/visa.py