/usr/lib/ is in python-qwt5-qt4 5.2.1~cvs20091107+dfsg-7+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/PyQt4/
/usr/lib/pyshared/
/usr/lib/pyshared/python2.7/
/usr/lib/pyshared/python2.7/PyQt4/
/usr/lib/pyshared/python2.7/PyQt4/Qwt5/
/usr/lib/python2.7/
/usr/lib/python2.7/dist-packages/
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/_iqt.so
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/Qwt.so
/usr/lib/pyshared/python2.7/PyQt4/Qwt5/Qwt.so
/usr/lib/pyshared/python2.7/PyQt4/Qwt5/_iqt.so
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/__init__.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/anynumpy.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/grace.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/ipy_user_conf.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/iqt.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/pythonrc.py
/usr/lib/python2.7/dist-packages/PyQt4/Qwt5/qplt.py