load.py

class Obj:

    def _validate(self):
        raise NotImplemented("The object %s has not an implemented validation function." % self)

    def dump(self):
        return {} #some valid dictionary 

    @classmethod
    def load1(cls, dct):
        o = cls()
        #do what need to do with o
        return o

    @staticmethod
    def load2(dct):
        o = Obj()
        #do what need to do with o
        return o