Using MVC when the model is dynamic

[pysim]

Hi, I have a couple of general requests for pointers to python
examples and design advice.

I'm looking for examples of MVC-based GUI controls done in python
(model-view-controller).

Also, examples where something like a simulation model running in its
own thread sends fast updates to a GUI in near real-time.  The only
examples I've seen, such as SimPy, wait until the model is finished
running before outputting data.

Most MVC controls I see in java for example are only designed for
infrequent user-driven changes, like resizing a window or mouse
clicks, not cases where the underlying model is changing itself over
time.