I’m developing a GUI framework in Python that is inspired by Flutter. Currently, I handle onPressed events by passing the function name as a string and then registering the callbacks in my main.py file. Here’s a simplified example of what I’m doing:

# ExampleWidget.py
button = Button(onPressed="handleClick")

# main.py
def handleClick():
    print("Button clicked!")

register_callback("handleClick", handleClick)

While this works, it feels cumbersome and error-prone. I would prefer a method that’s as simple and precise as Flutter’s approach, where you can directly pass the function as a callback without dealing with strings or separate registrations.

My goal: Simplify the onPressed logic so that it’s more intuitive and closely resembles Flutter’s design.

Questions:

How would you refactor this to avoid passing function names as strings?
What design patterns or techniques could I use to streamline this process?
Are there any best practices in Python that could help make this more elegant?
Additional Context:

The framework uses HTML and CSS for rendering the GUI in a PyWebView window.
I’m targeting desktop platforms like Ubuntu and Windows.
Any insights or suggestions would be greatly appreciated!