Dynamic addition of methods to class with decorators

dec_registry.py

class MainClass:
    DYN_METHOD_REGISTRY = {}

    def __init__(self):
        print(f"This class has dynamically added methods: {self.DYN_METHOD_REGISTRY.keys()}")

    def runmethods(self):
        for name, fp in self.DYN_METHOD_REGISTRY.items():
            fp(self,"test")

def add_dyn_method(name):
    def decorator(func):
        MainClass.DYN_METHOD_REGISTRY[name] = func
        setattr(MainClass,func.__name__, func)
        return func
    return decorator

@add_dyn_method("foo")
def foo_processor(self, test):
    print("foo")

@add_dyn_method("bar")
def bar_processor(self, test):
    print("bar")

kala = MainClass()

kala.runmethods()