I have a python GUI made with tkinter and I want to define a callback method to be called when the items in a listbox change:

Item added to the listbox
Item deleted from the listbox

I think that should be possible with bindings but I am not sure what is the exact binding name.
There are no built-in events when data is added to or removed from a listbox. However, since it's your code that adds and removes the data, you can generate your own events with event_generate whenever you update the listbox.
python tkinter Listbox bind with items updated