Using Python API to call a function in C ++ backend

#1

I am trying to figure out how I can call a function in C++ backend using the Python API. I understand everything is interfaced through PackedFunc(as shown in this link https://docs.tvm.ai/dev/runtime.html#packedfunc . But I am not sure how this code needs to be organized and are there some other things that I need to add to invoke a C++ function from a Python API?

#2

Any documents regarding this will be helpful. Thank You.