https://python.iswbm.com/c08/c08_06.html
https://python3-cookbook.readthedocs.io/zh_CN/latest/c09/p20_implement_multiple_dispatch_with_function_annotations.html
https://fasionchan.com/python-source/object-model/overview/
https://github.com/leisurelicht/wtfpython-cn#-examples%E7%A4%BA%E4%BE%8B
