/usr/lib/python2.7/dist-packages/sympy/calculus/ is in python-sympy 1.1.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sympy/calculus/__init__.py
/usr/lib/python2.7/dist-packages/sympy/calculus/euler.py
/usr/lib/python2.7/dist-packages/sympy/calculus/finite_diff.py
/usr/lib/python2.7/dist-packages/sympy/calculus/singularities.py
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/__init__.py
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/test_euler.py
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/test_finite_diff.py
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/test_singularities.py
/usr/lib/python2.7/dist-packages/sympy/calculus/tests/test_util.py
/usr/lib/python2.7/dist-packages/sympy/calculus/util.py