/usr/lib/python2.6/dist-packages/ffc/quadrature/ is in python-ffc 1.0.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.6/dist-packages/ffc/quadrature/__init__.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/expr.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/floatvalue.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/fraction.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/optimisedquadraturetransformer.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/product.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadraturegenerator.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadratureoptimization.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadraturerepresentation.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadraturetransformer.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadraturetransformerbase.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/quadratureutils.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/reduce_operations.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/sumobj.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/symbol.py
/usr/lib/python2.6/dist-packages/ffc/quadrature/symbolics.py