/usr/lib/python2.7/dist-packages/sympy/matrices/ is in python-sympy 0.7.5-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sympy/matrices/__init__.py
/usr/lib/python2.7/dist-packages/sympy/matrices/dense.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/__init__.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/adjoint.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/blockmatrix.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/determinant.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/diagonal.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/factorizations.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/fourier.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/funcmatrix.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/hadamard.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/inverse.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/matadd.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/matexpr.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/matmul.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/matpow.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/slice.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/__init__.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_adjoint.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_blockmatrix.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_determinant.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_diagonal.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_factorizations.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_fourier.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_funcmatrix.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_hadamard.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_indexing.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_inverse.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_matadd.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_matmul.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_matrix_exprs.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_slice.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_trace.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/tests/test_transpose.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/trace.py
/usr/lib/python2.7/dist-packages/sympy/matrices/expressions/transpose.py
/usr/lib/python2.7/dist-packages/sympy/matrices/immutable.py
/usr/lib/python2.7/dist-packages/sympy/matrices/matrices.py
/usr/lib/python2.7/dist-packages/sympy/matrices/sparse.py
/usr/lib/python2.7/dist-packages/sympy/matrices/sparsetools.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/__init__.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/test_immutable.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/test_interactions.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/test_matrices.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/test_sparse.py
/usr/lib/python2.7/dist-packages/sympy/matrices/tests/test_sparsetools.py