Is there a python method for equal to, that acts like add?

Question

So lets say I have a function FuncA(). Is there a dunder method that lets me see if FuncA is set equal to something kind of like __add__?

With __add__ I can set what happens if you do FuncA() + 1, but what I am looking to do is to set what happens if you do FuncA() = 1.