/usr/lib/python3/dist-packages/mpl_toolkits/axes_grid/grid_helper_curvelinear.py is in python3-matplotlib 1.3.1-1ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | from mpl_toolkits.axisartist.grid_helper_curvelinear import *
|