/usr/lib/python2.7/dist-packages/Pyrex/Compiler/ is in python-pyrex 0.9.8.5-2ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Builtin.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/CmdLine.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Code.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/DebugFlags.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Errors.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/ExprNodes.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Lexicon.pickle
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Lexicon.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Main.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/ModuleNode.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Naming.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Nodes.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Options.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Parsing.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/PyrexTypes.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Scanning.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Symtab.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/TypeSlots.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/Version.py
/usr/lib/python2.7/dist-packages/Pyrex/Compiler/__init__.py