1config BR2_PACKAGE_PYTHON_TYPING_EXTENSIONS 2 bool "python-typing-extensions" 3 select BR2_PACKAGE_PYTHON_TYPING if BR2_PACKAGE_PYTHON # runtime 4 help 5 Backported and Experimental Type Hints for Python 3.5+. 6 7 https://github.com/python/typing/blob/master/typing_extensions/README.rst 8