Question: Ideal way to return data from frontend in ipyWidget

[anant-k-singh]

I am creating a custom ipyWidget for Jupyter notebooks and blocked on the right architecture for my widget

These are the order of action I want to be performed:

1. In python kernel: Call a method of my widget class, say myWidget.ExtractData()
2. In python kernel: Somehow call a JavaScript method in frontend
   *Currently I update the shared state field and listen for state change on frontend (JS) side and execute that function
3. In widget frontend: Execute some task (~2 sec)
4. In widget frontend: Somehow return the computed value back to python kernel
   *Currently I update another shared state field and listen for state change on python kernel side
5. In python kernel: Receive the data sent by JS method (in frontend) and return that data from this myWidget.ExtractData() function
   *Not able to implement this. Currently I am reading the data directly from the shared state of the widget, which is not the expectation

Q1: Is it possible to implement this expectation?

Q2: If yes, please suggest me some advise, docs or examples where such scenarios are explained/implemented