/usr/include/boost/python/object/ is in libboost1.62-dev 1.62.0+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/python/object/add_to_namespace.hpp
/usr/include/boost/python/object/class.hpp
/usr/include/boost/python/object/class_detail.hpp
/usr/include/boost/python/object/class_metadata.hpp
/usr/include/boost/python/object/class_wrapper.hpp
/usr/include/boost/python/object/enum_base.hpp
/usr/include/boost/python/object/find_instance.hpp
/usr/include/boost/python/object/forward.hpp
/usr/include/boost/python/object/function.hpp
/usr/include/boost/python/object/function_doc_signature.hpp
/usr/include/boost/python/object/function_handle.hpp
/usr/include/boost/python/object/function_object.hpp
/usr/include/boost/python/object/inheritance.hpp
/usr/include/boost/python/object/inheritance_query.hpp
/usr/include/boost/python/object/instance.hpp
/usr/include/boost/python/object/iterator.hpp
/usr/include/boost/python/object/iterator_core.hpp
/usr/include/boost/python/object/life_support.hpp
/usr/include/boost/python/object/make_holder.hpp
/usr/include/boost/python/object/make_instance.hpp
/usr/include/boost/python/object/make_ptr_instance.hpp
/usr/include/boost/python/object/pickle_support.hpp
/usr/include/boost/python/object/pointer_holder.hpp
/usr/include/boost/python/object/py_function.hpp
/usr/include/boost/python/object/stl_iterator_core.hpp
/usr/include/boost/python/object/value_holder.hpp
/usr/include/boost/python/object/value_holder_fwd.hpp