Auto-register class methods using decorator

Question

I want to be able to create a python decorator that automatically \"registers\" class methods in a global repository (with some properties).

Example code:

Answer 1

Not easy, but if you are using Python 3 this should work:

registry = {}

class MetaRegistry(type):

    @classmethod
    def __prepare__(mcl, name, bases):
        def register(*props):
            def deco(f):
                registry[name + "." + f.__name__] = props
                return f
            return deco
        d = dict()
        d['register'] = register
        return d

    def __new__(mcl, name, bases, dct):
        del dct['register']
        cls = super().__new__(mcl, name, bases, dct)
        return cls

class my_class(object, metaclass=MetaRegistry):

    @register('prop1','prop2')
    def my_method( arg1,arg2 ):
       pass # method code here...

    @register('prop3','prop4')
    def my_other_method( arg1,arg2 ):
       pass # method code here...

print(registry)

Note that you can not have method names equal to the decorator name in the meta-typed class, because they are automatically deleted by the del command in the metaclass's __new__ method.

For Python 2.6 I think you would have to explicitly tell the decorator the class name to use.