/usr/lib/python2.7/dist-packages/sage/manifolds/ is in sagemath-common 7.4-9.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/sage/manifolds/__init__.py
/usr/lib/python2.7/dist-packages/sage/manifolds/all.py
/usr/lib/python2.7/dist-packages/sage/manifolds/chart.py
/usr/lib/python2.7/dist-packages/sage/manifolds/continuous_map.py
/usr/lib/python2.7/dist-packages/sage/manifolds/coord_func.py
/usr/lib/python2.7/dist-packages/sage/manifolds/coord_func_symb.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/__init__.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/chart.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/diff_map.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/manifold.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/manifold_homset.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/scalarfield.py
/usr/lib/python2.7/dist-packages/sage/manifolds/differentiable/scalarfield_algebra.py
/usr/lib/python2.7/dist-packages/sage/manifolds/manifold.py
/usr/lib/python2.7/dist-packages/sage/manifolds/manifold_homset.py
/usr/lib/python2.7/dist-packages/sage/manifolds/point.py
/usr/lib/python2.7/dist-packages/sage/manifolds/scalarfield.py
/usr/lib/python2.7/dist-packages/sage/manifolds/scalarfield_algebra.py
/usr/lib/python2.7/dist-packages/sage/manifolds/structure.py
/usr/lib/python2.7/dist-packages/sage/manifolds/subset.py
/usr/lib/python2.7/dist-packages/sage/manifolds/utilities.py