/usr/lib/python3/dist-packages/Cython/Includes/libcpp/ is in cython3 0.25.2-1.
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/usr/lib/python3/dist-packages/Cython/Includes/libcpp/__init__.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/algorithm.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/cast.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/complex.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/deque.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/iterator.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/limits.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/list.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/map.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/memory.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/pair.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/queue.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/set.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/stack.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/string.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/typeindex.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/typeinfo.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/unordered_map.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/unordered_set.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/utility.pxd
/usr/lib/python3/dist-packages/Cython/Includes/libcpp/vector.pxd