/usr/lib/python2.7/dist-packages/Cython/Debugger/ is in cython 0.23.4-0ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/Cython/Debugger/Cygdb.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/DebugWriter.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/TestLibCython.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/__init__.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/cfuncs.c
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/codefile
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/test_libcython_in_gdb.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/Tests/test_libpython_in_gdb.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/__init__.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/libcython.py
/usr/lib/python2.7/dist-packages/Cython/Debugger/libpython.py