/usr/include/python2.7/CXX/Python2/ is in python-cxx-dev 7.0.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/python2.7/CXX/Python2/Config.hxx
/usr/include/python2.7/CXX/Python2/CxxDebug.hxx
/usr/include/python2.7/CXX/Python2/Exception.hxx
/usr/include/python2.7/CXX/Python2/ExtensionModule.hxx
/usr/include/python2.7/CXX/Python2/ExtensionOldType.hxx
/usr/include/python2.7/CXX/Python2/ExtensionType.hxx
/usr/include/python2.7/CXX/Python2/ExtensionTypeBase.hxx
/usr/include/python2.7/CXX/Python2/Extensions.hxx
/usr/include/python2.7/CXX/Python2/IndirectPythonInterface.hxx
/usr/include/python2.7/CXX/Python2/Objects.hxx
/usr/include/python2.7/CXX/Python2/PythonType.hxx
/usr/include/python2.7/CXX/Python2/cxx_standard_exceptions.hxx