/usr/lib/python2.7/dist-packages/Cython/Build/ is in cython 0.23.4-0ubuntu5.
This file is owned by root:root, with mode 0o755.
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/usr/lib/python2.7/dist-packages/Cython/Build/BuildExecutable.py
/usr/lib/python2.7/dist-packages/Cython/Build/Cythonize.py
/usr/lib/python2.7/dist-packages/Cython/Build/Dependencies.py
/usr/lib/python2.7/dist-packages/Cython/Build/Inline.py
/usr/lib/python2.7/dist-packages/Cython/Build/IpythonMagic.py
/usr/lib/python2.7/dist-packages/Cython/Build/Tests/
/usr/lib/python2.7/dist-packages/Cython/Build/Tests/TestInline.py
/usr/lib/python2.7/dist-packages/Cython/Build/Tests/TestIpythonMagic.py
/usr/lib/python2.7/dist-packages/Cython/Build/Tests/TestStripLiterals.py
/usr/lib/python2.7/dist-packages/Cython/Build/Tests/__init__.py
/usr/lib/python2.7/dist-packages/Cython/Build/__init__.py