Use __getattribute__ to run a pre-command hook and continue

I want to set a class state variable before running any class methods every time I call a method; is there a way to use __getattribute__ to run a pre-command hook and continue on to the attr specified? Would I have to use a metaclass, for example?

>Solution :

To do this using __getattribute__ you could do something like this.

import inspect

class A:
    def __getattribute__(self, attrname):
        attr = super().__getattribute__(attrname)
        if inspect.ismethod(attr):
            # Do state stuff
        return attr
        

Instead of using __getattribute__ you could also create a decorator function that does the state stuff you want to do, and add that to each method you want it to apply to.