widget communication in Tkinter

[Stephen Boulet]

Is there a standard method for widgets to communicate with one another in tkinter?

For example, if I want a button press to update a label's text field, I found 
that I can make a MyButton class that inherits Button, and store my label's 
config method as a MyButton method.

I was wondering if tkinter has some sort of built in mediator class to handle 
transactions like this.

-- Stephen