Added py.typed marker file to python package.

Author: timohl

cpp/pybind/make_python_package.cmake

@@ -133,7 +133,8 @@ file(COPY "${PYTHON_PACKAGE_SRC_DIR}/../examples/python/"
 file(COPY "${PYTHON_PACKAGE_SRC_DIR}/../examples/python/"
      DESTINATION "${PYTHON_PACKAGE_DST_DIR}/open3d/examples")
 
-# Generate typing stub files (.pyi)
+# Generate typing stub files (.pyi) and py.typed marker file.
 message(STATUS "Generating typing stubs...")
 message(STATUS "pybind11-stubgen open3d -o ${PYTHON_PACKAGE_DST_DIR}/stubs")
-execute_process(COMMAND ${CMAKE_COMMAND} -E env PYTHONPATH="${PYTHON_PACKAGE_DST_DIR}" pybind11-stubgen open3d -o "${PYTHON_PACKAGE_DST_DIR}")
+execute_process(COMMAND ${CMAKE_COMMAND} -E env PYTHONPATH="${PYTHON_PACKAGE_DST_DIR}" pybind11-stubgen open3d -o "${PYTHON_PACKAGE_DST_DIR}")
+file(WRITE "${PYTHON_PACKAGE_DST_DIR}/open3d/py.typed")